Answer:
He did not distribute the negative sign when he subtracted.
Step-by-step explanation:
x-(x+1) is equal to a -1. He did not distribute the negative.
In third step, he did not distribute the negative sign when he subtracted. Then the correct option is C.
What is Algebra?Algebra is the study of graphic formulas, while logic is the interpretation among those signs.
Mr. Knotts found the difference of the following expression.
The expression is given below.
[tex]\rm \rightarrow \dfrac{x}{x^2-1} - \dfrac{1}{x -1}[/tex]
Then the first step of the expression will be
[tex]\rm \rightarrow \dfrac{x}{(x+1)(x-1)} - \dfrac{1}{x -1}[/tex]
The second step of the expression will be
[tex]\rm \rightarrow \dfrac{x}{(x+1)(x-1)} - \dfrac{1(x+1)}{(x+1)(x -1)}[/tex]
The third step of the expression will be
[tex]\rm \rightarrow \dfrac{x - (x +1)}{(x+1)(x-1)}\\\\\rm \rightarrow \dfrac{x - x -1}{(x+1)(x-1)}[/tex]
In third step, he did not distribute the negative sign when he subtracted.
Then the correct option is C.
More about the Algebra link is given below.
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A triangle has a base of x 1/2 m and a height of x 3/4 m. if the area of the triangle is 16 m^2, what are the base and the height of the triangle
Answer:
base = 6.4m
height = 5m
Step-by-step explanation:
Given area = 16m^2
3/4 -1/2 = 1/4 into something x 0.25 its size then add
We see that 2.5 is 10 multiplied. not relevant unless doing algebra
We also see that 0.5 is 0.25 x 2 not relevant unless doing algebra
We start with 5
16/5 = 3.2
if 5 is the height then 3.2 x 2 must be the base.
As we half base to find area so we change this value and reverse the area 1/2 above. 3.2 x 2 = 6.4m base. and 5m height stays as it is.
If we did algebra
Then 1/2 = 0.5 = 4.5
3/4 = 0.75 = 3.75
and we would have to plug in 1 as x
3 as x to find one value as 5.5 (-1) = 4.5
We find 3.75 as 5 (-1 )- 1/4 = 3.75
3.75 x 4.5 = 16.875m^2
and is closest fit using 1/4, 1/2 and -1.
But 3.2 x 5 is a better multiplication as 3 1/5 and finds 16 exact.
Find the area of a trapezoid, base 1 measures 5 inches, base 2 measures 11 inches, height measures 7 inches
Answer:
56
Step-by-step explanation:
Solve this equation 2/3x+ 5= 1
Answer:
x=-6
Step-by-step explanation:
2/3x+5=1
Subtract 5 from both sides:
2/3x=-4
Multiply both sides by 3:
2x=-12
Divide both sides by 2:
x=-6
Hope this helps!
Answer:
-6
Step-by-step explanation:
2/3x +5 = 1
-5 -5
2/3x = -4
2/3x/2/3 = -4/2/3
= -6
:3 if I helped, please mark as brainliest!
There were 23 students running in a race. How many different arrangements of first, second, and third place are possible?
Answer:
10626 different arrangements
Step-by-step explanation:
As we have a total of 23 students and we want to form groups of 3, where the order of the 3 students matters, we can solve this problem using a permutation of 23 choose 3.
The formula for a permutation of n choose p is:
P(n,p) = n! / (n-p)!
So, using n = 23 and p = 3, we have:
P(23,3) = 23! / (23-3)! = 23! / 20! = 23 * 22 * 21 = 10626
So we have a total of 10626 different arrangements of first, second and third place.
Which of the points (s, t) is inside the shaded region of the set of inequalities shown below?
s<24 - 0.66t
s>12 - t
s< 30 - t
s>0
t>0
O A. (1,8)
O B. (-9,21)
O C. (9,4)
O D. (30, 10)
Answer:
Only point C. (9,4)
Step-by-step explanation:
To check if the points are inside the region of the inequalities, we just need to use the values of the point in each inequation, and if the point satisfy all inequations, the point is inside the region.
point A = (1,8): s = 1 and t = 8
first inequation: s<24 - 0.66t
1 < 24 - 0.66*8
1 < 18.72 (true)
second inequation: s>12 - t
1 > 12 - 8
1 > 4 (false)
So point A is not inside the region.
point B = (-9,21): s = -9 and t = 21
As we can see from the fourth inequation, the s value needs to be greater than 0, and point B has s negative, so point B is not inside the region.
point C = (9,4): s = 9 and t = 4
first inequation: s<24 - 0.66t
9 < 24 - 0.66*4
9 < 21.36 (true)
second inequation: s>12 - t
9 > 12 - 4
9 > 8 (true)
third inequation: s< 30 - t
9 < 30 - 4
9 < 26 (true)
fourth inequation: s>0
9 > 0 (true)
fifth inequation: t>0
4 > 0 (true)
As all conditions are true, point C is inside the region.
point D = (30,10): s = 30 and t = 10
first inequation: s<24 - 0.66t
30 < 24 - 0.66*10
30 < 17.4 (false)
So point D is not inside the region.
Answer:9,4
Step-by-step explanation:
What is the volume of a cube that has a height of 10 inches
Answer:
1000 inches
Step-by-step explanation:
V= a3=103=1000in³
Answer:1,000in3
Step-by-step explanation:
V=LxWxH
V=10x10x10
V= 1,000
the question is on the image
Answer:
1/6
Step-by-step explanation:
The slope of a line in y=mx+b form is always the number before the x value.
Hope this helps!
Help please will give brainly! Clara’s friend Brian decides to find his median as well. Find the median and type it in the answer box. What does the median show us?
Answer:
The median is 88. The median shows that Brian gets on average 88% on his tests.
Step-by-step explanation:
If you put the numbers in order and get the average of the two middle number, it is 88.
Name the first 10 perfect squares. Why are they perfect squares?"
Answer:
why a math problem
Step-by-step explanation:
math is hard
Help me find the MAD volume please
How many sundaes are there?
Answer:
2
Step-by-step explanation:
8+12+4+8 = 32
32/4 = 8
8-8 = 0
12-8 = 4
8-4 = 4
8-8 = 0
4+4+0+0 = 8
8/4 = 2
help help!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
The first option, the mayor will lose by a large percentage.
Step-by-step explanation:
If you look at the numbers, You can see that the two best answers which are excellent and satisfactory are low, and in total equal 28.
Being compared to the lower ratings which are needs improvement and unsatisfactory are high, and in total equal 52.
Seeing this, this shows that the mayor will lose the election the with more than half of the people voting for someone else.
All the other options excluding the first one, say that he will win by a close call, a big percent, or a close call again.
which just leaves the first option saying that he will lose by large percent, which is true.
add or subtract (7x^2-x-2)-(-6x^3+3)
Answer:
[tex] \tt{}6x ^{3} + {7x}^{2} - x - 5[/tex]
Step-by-step explanation:
[tex] \tt{}(7 {x}^{2} - x - 2) - ( - 6 {x}^{3} + 3)[/tex]
[tex] \tt{}7 {x}^{2} - x - 2 + 6x^{3} - 3[/tex]
[tex] \tt{} {7x}^{2} - x - 5 + 6x ^{3} [/tex]
[tex] \tt{}6x ^{3} + {7x}^{2} - x - 5[/tex]
Answer:
[tex]6 {x}^{3} + 7 {x}^{2} - x - 5[/tex]
Step-by-step explanation:
[tex](7 {x}^{2} - x - 2) - ( - 6 {x}^{3} + 3)[/tex]
➡️ [tex]7 {x}^{2} - 2 - ( - {6}^{3} + 3)[/tex]
➡️ [tex]7 {x}^{2} - x - 2 + 6 {x}^{3} - 3[/tex]
-2 - 3-(2 + 3)-5➡️ [tex]7 {x}^{2} - x - 5 + 6 {x}^{3} [/tex]
➡️ [tex]6 {x}^{3} + 7 {x}^{2} - x - 5[/tex] ✅
When there is no outlier is thebetter measure of center for a set of data
Median
Mode
Range
None of the above
Answer:
Median
Explanation:
The median is the middle number. This answer fits best with the question asked.
The mode is the number that occurs the most. This number doesn't really have a correlation to the middle of this data.
The range is just how many numbers the data spans across. It has no relation to the middle of the data.
help plz question is in the photo
Answer:
A. Trinomial
Step-by-step explanation:
It says it's a polynomial and that based on the number of terms. So right then you can cancel out cubic and quadratic because they aren't polynomials. Also:
Cubic is just a variable with the exponent of 3. Examples:
[tex]x^3,y^3,z^3[/tex]
Binomial is a polynomial with 2 terms. Examples:
[tex]5x+3; 6x+2; x+7[/tex]
A quadratic has a division sign.
I need help. How do you get 12.4 as an answer with using these instruction below.
Answer:
There are many solutions.
Here is one of them:
1 x 4 / 10 + 14 - 2 = 12.4
Hope this helps!
:)
Answer this there is a pic
Answer:
A
Step-by-step explanation:
1:2.5 because 2/2=1 and 5/2=2.5
Can someone help with this
Answer:
the answered is -3 like in the picture
Step-by-step explanation:
Consider the following polynomial.
-2xys + 3x? - 10x°y6 + 8x + 4
Which of the following statements are true? Select all that apply.
-The polynomial has 5 terms.
-The leading coefficient is -2.
.
-The degree of the polynomial is 7.
-The constant term is 4.
-The polynomial is in decreasing degree order.
Answer:
Step-by-step explanation:
If you write correctly:
[tex]P = -2xys+3x? - 10xy^{6} +8x+4\\[/tex]
I do not know the "?" in the formule de P
-The polynomial has 5 terms. Yes
-The leading coefficient is -2. No
.
-The degree of the polynomial is 7. Yes
-The constant term is 4. Yes
-The polynomial is in decreasing degree order. No
Fond the equation of the line shown
Answer:
y+-1/2x-1
Step-by-step explanation:
The line is negative
It rises one digit and runs 2
and it crosses though -1 on the y axis
Which property is illustrated by the
equation below?
7 + (-7) = 0
A. Additive Inverse Property
B. Distributive Property
C. Associative Property of Addition
D. Additive Identity Property
Answer:
additive inverse
Step-by-step explanation:
-7 is the inverse of 7 so adding it would cancel it out making it 0
I need help with this please ASAP!!!
Answer:
B and c
Step-by-step explanation:
Which ratio is not equivalent to the others?
Answer:
4:7
Step-by-step explanation:
3:5=6:10/2=3:5
9:15=9:15/3=3:5
Answer:
number 13. is d
Step-by-step explanation:
It took Darcy two days to drive from Orlando to Pittsburgh. She drove 595 miles on the first day and at least 1,020 miles in total. How many miles did she drive on the second day?
Answer:
Darcy drove 425 miles
Step-by-step explanation:
you find this out by doing the equation 1,020-595
Ms. Sanders put $5,200 in a savings account that pays 4.2% simple interest. Each year she withdraws the interest and treats herself to a visit to a spa. How much can she spend each year?
Answer:
$218.40
Step-by-step explanation:
i=prt
i=(5200)(.042)(1)
Zayne has a bag filled with coins. The bag contains 7 quarters, 8 dimes, 3 nickels, and 9 pennies. He randomly chooses a coins from the bag. What is the probability that Zayne chooses a quarter or a nickel?
Answer:
Q=7/27 N=1/9 which is 10/27
Step-by-step explanation:
you add all the coins together
then if it is quarter then it is 7/27
if it is a nickel then it is 3/27 = 1/9
HELP will mark brainliest
Answer:
x=55 degrees
Step-by-step explanation:
Angle X + 125 degrees is 180 degrees. 180 minus 125 is 55.
Find the volume of a pyramid with a square base, where the area of the base is 19.6\text{ cm}^219.6 cm 2 and the height of the pyramid is 12.7\text{ cm}12.7 cm. Round your answer to the nearest tenth of a cubic centimeter.
Answer:
V = 83.0 cm^3
Step-by-step explanation:
To find the volume of the squared pyramid you use the following formula:
[tex]V=\frac{1}{3}Bh[/tex] ( 1 )
B: base of the pyramid = 19.6 cm^2
h: height of the pyramid = 12.7 cm
you replace the values of B and h in the equation ( 1 ):
[tex]V=\frac{1}{3}Bh=\frac{1}{3}(19.6cm^2)(12.7cm)\\\\V=82.97cm^3\approx 83.0cm^3[/tex]
hence, the volume of the pyramid is 83.0 cm^3
A monkey is swinging from a tree. On each swing, she travels along an arc that is
75%, percent as long as the previous swing's arc. The total length of the arcs from her first 4 swings is 175m.How long was the monkey's 1st swing?
Round your final answer to the nearest meter.
Answer:
Total length of the first swing=64 m
Step-by-step explanation:
The total length of all four swings can be expressed as; Total length of all 4 swings=Length of first swing+length of second swing+length of third swing+length of fourth swing
where;
Total length of all 4 swings=175 m
Length of first swing=x
Length of second swing=75% of length of first swing=(75/100)×x=0.75 x
Length of third swing=75% of length of second swing
Length of third swing=(75/100)×0.75 x=0.5625 x
Length of fourth swing=75% of length of third swing
Length of fourth swing=(75/100)×0.5625 x=0.421875 x
replacing;
Total length of all 4 swings
175=x+0.75 x+0.5625 x+0.421875 x
2.734375 x=175
x=175/2.734375
x=64
Total length of the first swing=x=64 m
(x+2)(x-3)(x+5) is identical to x^(3)+ax^(2)-11x+b
Find the value of a and the value of b
Answer:
a = 4 and b = - 30
Step-by-step explanation:
Expand the left side and compare like terms on both sides, that is
(x + 2)(x - 3)(x + 5) ← expand the first pair of factors using FOIL
= (x² - x - 6)(x + 5) ← distribute
= x³ + 5x² - x² - 5x - 6x - 30 ← collect like terms
= x³ + 4x² - 11x - 30
Compare like terms with x³ +ax² - 11x + b
4x² and ax² ⇒ a = 4
+ b and - 30 ⇒ b = - 30
The requried simplified values of a and b are given as 4 and -30 respectively.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
here,
Given expression,
(x+2)(x-3)(x+5) = x³+ax²-11x+b
(x + 2)[x² +2x -15 ] = x³+ax²-11x+b
x³ +4x² -11x - 30 = x³+ax²-11x+b
Comparing both sides,
a = 4 and b = -30
Thus, the requried simplified value of a and b are given as 4 and -30 respectively.
Learn more about simplification here:
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Martha used 2/3
tablespoons of pepper to make 1/6
liters of gravy. If Martha's recipe is for 1 liter of gravy, how much pepper will she need to make double the recipe?
A) 2 tablespoons of pepper
B) 4 tablespoons of pepper
C) 8 tablespoons of pepper
D) 12 tablespoons of pepper
plz helppp
Answer:
8 tablespoons of pepper
Step-by-step explanation:
Therefore, double the recipe: 4 × 2 = 8 tablespoons of pepper
