Answer:39.9
Step-by-step explanation:
PLEASE HELP 50 POINTS
What is the inverse of y= 1/3 * 7^x-1
Answer:
I think its C
Step-by-step explanation:
Hello I need the answer fast pls The tennis courts are 3 blocks west and 2 blocks south of Miguel’s house. The bike path is 5 blocks east and 2 blocks south of Miguel’s house. How many blocks are the tennis courts from the bike path?
Answer:
8
Step-by-step explanation:
If its correct please give brainliest
y= x+4 what is the answer?
Answer:
x = y − 4
Step-by-step explanation:
y=x+4
Step 1: Flip the equation.
x+4=y
Step 2: Add -4 to both sides.
x+4+−4=y+−4
x=y−4
Answer:
x=y−4
PLSSS HELP ME I DONT HAVE MUCH TIME
Answer:
- 12 and - 187
Step-by-step explanation:
To evaluate f(- 7) substitute x = - 7 into f(x)
f(- 7) = 2(- 7) + 2 = - 14 + 2 = - 12
Similarly for g(- 4)
g(- 4) = 3(- 4)³ + 5 = 3(- 64) + 5 = - 192 + 5 = - 187
Malcolm planted two trees in his yard. One tree is 50 inches tall and grows
at a rate of 2 inches per month. The other tree is 59 inches tall and grows
at a rate of 1 inch per month. How many months will it take until both
trees are the same height?
A man travels 20 km by car from Town P to Town Q at an average speed of x km/h. He finds that the time of the journey would be shortened by 12 minutes if he increases his speed by 5 km/h. Find the value of x.
Answer:
x = 20.
Step-by-step explanation:
First, you should remember the relation:
Distance = Speed*Time.
First, we know that a man travels a distance of 20km at a speed of x km/h, in a time T.
We can write this as:
20km = (x km/h)*T
We know that the time is shortened by 12 minutes if the speed is increased by 5km/h
Rewriting these 12 minutes in hours (remember that 60min = 1 hour)
12 min = (12/60) hours = 0.2 hours
Then from this, he can travel the same distance of 20km in a time T minus 0.2 hours if the speed is increased by 5 km/h
We can write this as:
20km = (x + 5 km/h)*(T - 0.2 h)
Then we have a system of two equations, and we want to find the value of x:
20km = (x km/h)*T
20km = (x + 5 km/h)*(T - 0.2 h)
First, we should isolate the variable T in one of the equations, if we isolate it in the first one, we will get:
20km/(x km/h) = T
Replacing that in the other equation we get:
20km = (x + 5 km/h)*(T - 0.2 h)
20km = (x + 5 km/h)*( 20km/(x km/h) - 0.2 h)
Now we can solve this for x.
Removing the units (that we know that are correct) so the math is easier to read, we get:
20 = (x + 5)*(20/x - 0.2)
We only want to solve this for x.
20 = x*20/x - x*0.2 + 5*20/x - 5*0.2
20 = 20 - 0.2*x + 100/x - 1
subtracting 20 in both sides we get:
20 - 20 = 20 - 0.2*x + 100/x - 1 - 20
0 = -0.2*x + 100/x - 1
If we multiply both sides by x we get:
0 = -0.2*x^2 + 100 - x
-0.2*x^2 - x + 100 = 0
This is just a quadratic equation, we can solve it using the Bhaskara's equation, the solutions are:
[tex]x = \frac{-(-1) \pm \sqrt{(-1)^2 - 4*(-0.2)*100} }{2*-0.2} = \frac{1 \pm 9 }{-0.4}[/tex]
Then the two solutions are:
x = (1 + 9)/-0.4 = -25
x = (1 - 9)/-0.4 = 20
As x is used to represent a speed, the negative solution does not make sense, so we should use the positive one.
x = 20
then the average speed initially is 20 km/h
A window is being replaced with tinted glass. The plan below shows the design of the window. Each unit length represents 1 foot. The glass costs $16 per square foot. How much will it cost to replace the glass? Use 3.14 fo
what is the probability of rolling a 6?
EASY GEOMETRY PLS HELP!!!!
Answer:
D
Step-by-step explanation:
It is a 30, 60, 90 triangle
if the leg on the same side as the 90 degree angle is [tex]14\sqrt{3}[/tex], then:
The base is 14, and the hypotenuse is 28
In this type of triangle:
the base [tex]\sqrt{3}[/tex] is the other leg
and 2 times the base is the hypotenuse
so x=14, and y=28
Answer D
I need to know how to solve this anyone?
I can't make out what the radius of the sphere is, but the equation you're looking for is:
[tex]V=\frac{4}{3}\pi r^3[/tex]
For example:
If the radius of a sphere is 5 m, it's volume would be,
[tex]V=\frac{4}{3}\pi (5)^3[/tex]
[tex]V=\frac{4}{3} (3.14)(5)^3[/tex]
[tex]V=\frac{4}{3}(3.14)(125)[/tex]
[tex]V=523.6 m^3[/tex]
Hello, Please help me :D thank you!
Answer:
6a. 26
6b. 60%
6c. 33.3% or just one-thrid
7. 80.925 rounded is $80.93
8. 240
9. 25
10. 54%
Step-by-step explanation:
brainliest please!
Answer:
Step-by-step explanation:
chocolate donuta= 35% of 40
=[tex]\frac{35}{100} *40[/tex]
=[tex]\frac{1400}{100}[/tex]
=14
chocolate donuts=14
a.donuts that are not chocolates=40-14
=26
b.donuts with sprikles=24
percent of donjts with sprikles=24/40 *100%
=(2400/40)%
=60%
c.donuts that have cream filling out of donut that have sprikles=8
percent of donuts which have sprikles with cream filling=8/24*100%
=(800/24)%
=33.33%
7.final cost=35% of $124.50
=35/100 *$124.50
=$4357.5/100
=$43.575
8.48% 0f 500
=48/100 *500
=48*5
=240
9.let the number be x
15=60% 0f number
15=60/100 *x
15/x=60/100
do cross multiplication
x*60=15*100
x=1500/60
x=25
therefore the number is 25.
10.let the percent be y%
90=y% of 60
90=y/100 *60
90*100=60y
9000/60=y
y=150 %
therefore 150% 0f 60 is 90
A 2-gallon jug of water costs $8.24. What is the price per quart?
Answer:
8×$8.24=0.97 cents
Step-by-step explanation:
there are 4 quarts in a gallon. so 8 quarts in 2 gallons. divide 8 by $8.24
Write a compound inequality to represent all of the numbers between -4 and 6. Write your answer using proper set notation.
Answer:
Step-by-step explanation:
+56
answer plz answer plz
Answer:
C. [tex] 2 y^2 [/tex]
Step-by-step explanation:
[tex]( {3} \degree {y}^{2} ) \times \: 2(xy) \degree \\={3} \degree {y}^{2} \times \: 2\times x \degree\times y \degree \\=1 {y}^{2} \times \: 2\times 1\times 1 \\ = {y}^{2} \times 2 \\ = 2 {y}^{2} [/tex]
What is the slope of the line? Hint: Note the scales for the x and y axis.
What is the y - intercept of the line?
What is the equation of the line? y = x +
Use the equation to predict the number of visits per week to a coffee shop that is 3 blocks away.
Answer:
y = (-1 visit/block)x + 9 visits
6 visits
Step-by-step explanation:
The y-intercept is 9 (meaning 9 visits per week).
Note that (1, 8) is a point on the line.
To find the equation of this line, start with the slope-intercept form y = mx + b. We know that when x = 1, y = 8 and that the y-intercept, b, is 9. Therefore:
8 = m(1) + 9.
Solve this by subtracting 9 from both sides. We get:
-1 = m
The slope is m = -1 visits/block
and the desired equation is y = (-1 visit/block)x + 9 visits
If a particular coffee shop is 3 blocks away, we predict that the number of visits per week made to this shop is y = -1(3) + 9, or 6 visits
What is the square inches
A.51 square inches
B. 90 square inches
C.100 square inches
D.190 square inches
Answer:
8*8+12*3=100 is the answer
Which of the following are interior angles in the figure below?
Answer:
C
Step-by-step explanation:
The interior angles means the angles inside the triangle
Please please help with this no links please
Answer:
f/9
Step-by-step explanation:
n + 5/5 = f + 9/9
do cross multiplication
5(f+9)=9(n+5)
5f+45=9n+45
5f=9n+45-45
5f=9n+0
f/9 = n/5
Kiran's father is 65 years old. He is 8 years older than three
times Kiran's age. Find Kiran's age?
Answer:
let kiran's age be x
kiran's father's age is 65
acc.to ques
kiran's father is 8 years older than 3 times kiran's age ....which gives us the equation as follows
8+3x =65
therefore
3x =65-8
3x =57
x =57/3
x= 19 ans
so kiran's age is 19 years.
Answer:
kiran is 19 years old.
Step-by-step explanation:
kiran's father age = 65
let kiran's age be x
kiran's father is 8 years older than three times kiran's age means 8 + 3x
so according to the question equation is
65 = 8 + 3x
65 - 8 = 3x
57/3 = x
19 = x
therefore kiran's age is 19 years.
what is the percent decrease of y=400(0.37)^x
Answer:
y= 16(0.25)^x
Step-by-step explanation:
y= 16(0.25)^x
The exponential equation represents an exponential decay because the rate of decay is 0.25 which is less than 1.
The general form equation is:
y(x)= a(1-r)^x such that r is the decay percent.
Comparing two equation we have 1-r = 0.25
==> r= 1-0.25 = 0.75 = 75%
2. y= 0.8(1.8)^x
The equation represents exponential growth because the growth factor is greater than 1.
==> 1+r = 1.8
==> r= 0.8 = 80%
3. y= 17(1/5)^x
The equation represents exponential decay because 1/5 is less than 1.
==> 1-r = 1/5
==> r= 1- 1/5 = 4/5 = 0.8= 80%
What the side length ST equals
Answer:
7.1 in
Step-by-step explanation:
A triangle adds up to 180 degrees, and we know angle S is 90 degrees, so angle U is 180-90-42=48 degrees.
Using the law of Sines, we can say that
sin(90)/9.5 = sin(48)/ side ST
Thus, side ST = sin(48) * 9.5/sin(90) = 7.1 in
Evaluate the expression below when x = 7 and y = 8.
5x2−3y
Answer:
221
Step-by-step explanation:
Substitute x = 7 and y = 8 into the expression
5(7)² - 3(8)
= 5(49) - 24
= 245 - 24
= 221
Which ordered pair is located on the X-axis? A) (0,-5) B) (-2) C) (3,0) D) (-1,5)
Answer:
(3 , 0 )
Step-by-step explanation:
At x-axis, y-co ordinate is 0
So, (3,0)
Answer: (3, 0)
Step-by-step explanation: The x-intercept is a point where a line crosses the x-axis and it's important to understand that all x-intercepts have a y-coordinate of zero. So the point (3, 0) is the x-axis.
In the picture below, I have plotted a few points including the point
in this problem to show you that all x-intercepts have a y-coordinate of zero.
Can someone else me with this
Answer:
8
Step-by-step explanation:
Answer:
Hi, there your answer is 4
Step-by-step explanation:
BRAINIEST AND 15 POINTS HELP FAST!!!
In the square below, the two semi-circles are congruent. Find the area of the
shaded region. If necessary, round your answer to two decimal places.
Answer:
3.44.
Step-by-step explanation:
We can see that in this square, the radii of the semicircles are 2. Using that, we can calculate that the area of each one is 6.58. Both combined is 12.56. Now, the original area of the circle was 16. 16 minus 12.56 is equal to 3.44, so the area of the shaded region is 3.44.
Answer:
3.44
Step-by-step explanation:
enter it just like that in ape x
The probability model based on experimental probability for randomly selecting a marble from a bag is P(green)=18/40, P(Blue)=14/40, and P(white)=8/40. About how many marbles of each color are in the bag if there are 60 total marbles.
A. 27 green, 12 blue, 21 white
B. 12 green, 27 blue, 21 white
C. 27 green. 21 blue, 12 white
D. 27 white, 12 blue, 21 green
Answer:
C
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
it the only one that make sense
find the indicated side of the triangle 60 30
Answer:
7√3
Step-by-step explanation:
tan 60° = x/7
√3 = x/7
x = 7√3
Which transformation is a dilation?
The dolphin is 20 feet below the serface of the ocean.
Answer: we wont be able to answer if there is no fill out box
Step-by-step explanation:
Answer:
Can you complete the sentence?
What number should be added to both sides of the equation to complete the squa
x2 - 10x = 7
Given:
The equation is:
[tex]x^2-10x=7[/tex]
To find:
The number that should be added to sides of the equation to complete the square.
Solution:
If an expression is in the form of [tex]x^2+bx[/tex], then we have to add [tex]\left(\dfrac{b}{2}\right)^2[/tex] to make it perfect square.
We have,
[tex]x^2-10x=7[/tex] ...(i)
To make it perfect square we need to add square of half of coefficient of x on both sides.
Coefficient of x is -10, so square of half of coefficient of x is:
[tex]\left(\dfrac{-10}{2}\right)^2=(-5)^2[/tex]
[tex]\left(\dfrac{-10}{2}\right)^2=25[/tex]
On adding 25 on both sides of (i), we get
[tex]x^2-10x+25=7+25[/tex]
[tex](x-5)^2=32[/tex]
Therefore, we need to add 25 to both sides of the equation to complete the square.
