Jane is solving the equasion -2x + 4 = 18. She tells her partner that they should add two to both sides first since that is the inverse of -2. Did Jane start this equation correctly? Explain your reasoning
Answer:
No
Step-by-step explanation:
Given
- 2x + 4 = 18
note the inverse of - 2 is - [tex]\frac{1}{2}[/tex] not - 2
However , the first step is to isolate the term in x by subtracting 4 from both sides.
- 2x = 18 - 4 = 14 ( divide both sides by - 2 )
x = - 7
What is the inverse of multiplication?
(A) subtraction
(B) division
(C) addition
(D) multiplication
Answer:
b
Step-by-step explanation:
Answer:
b) division.
Hope it helps you....Find the perimeter. Simplify your answer.
60'
90-8
4c+6
c-7
6c + (c - 7) + (9c - 8) + (4c + 6) =
= 6c + c - 7 + 9c - 8 + 4c + 6 =
= 6c + c + 9c + 4c - 7 - 8 + 6 = 20c - 9
From 1985 through 1995, the yearly gross farrm revenue (in millions) in the United States can be modeled by the function R(t)=-t^2+7t+159 and the yearly farm cost (in millions) in the United States can be modeled by the function c(t)=t^2+131 where t is the number of years since 1985. Write a new function, P(t), that models the yearly profit after 1985
The profit function is simply the difference between the revenue function and the cost function. The profit function that models the yearly profit after 1985 is [tex]P(t) = 7t + 28[/tex]
Given that:
[tex]R(t) = t^2 + 7t + 159[/tex]
[tex]c(t) = t^2 + 131[/tex]
The profit function P(t) is calculated as follows:
[tex]P(t) = R(t) - c(t)[/tex]
So, we have:
[tex]P(t) = t^2 + 7t + 159 - (t^2 + 131)[/tex]
Open brackets
[tex]P(t) = t^2 + 7t + 159 - t^2 - 131[/tex]
Collect like terms
[tex]P(t) = t^2- t^2 + 7t + 159 - 131[/tex]
[tex]P(t) = 7t + 28[/tex]
Hence, the profit function that models the yearly profit after 1985 is [tex]P(t) = 7t + 28[/tex]
Read more about profit functions at:
https://brainly.com/question/11334756
Solve : x/3-2/5 = 2x/15-3/5
Step-by-step explanation:
x/3-2/5=2x/15-3x
5x-6=2x-9
5x-2x=-9+6
3x=-3
3x/3=-3/3
x=-1
Find the area of a rectangular ground which is 14 1/2 m long and 10 2/3 m wide.
Answer:
154 2/3 m²
Step-by-step explanation:
14 1/2 x 10 2/3
First, make the mixed numbers into improper fractions:
29/2 x 32/3
Simlify by cross cancelling if you can:
29/1 x 16/3
Then, multiply:
29/1 x 16/3 = 29 x 16/1 x 3 = 464/3
Finally, turn the new improper fraction into a simplified mixed number:
464/3 = 154 2/3
The area is 154 2/3 m²
Round the fraction to the nearest whole number.
5/8
please help
Answer:
1
Step-by-step explanation:
so when you divide 5/8 you get 0.625 and rounding it of to the nearest whole number it will be 1.
hope this helps
Answer:
1
Step-by-step explanation:
(8/8) = 1 (4/8) = half (0/8) = 0
(5/8) = a bit more than half, so is closer to 1
5/8≈1
Evaluate (27)−1/3(27)−1/3×[271/3−272/3]
Answer:
[tex](27) - \frac{1}{3} (27) - \frac{1}{3} \times ( \frac{271}{3} - \frac{272}{3} ) \\ \\ 27 - 9 - \frac{1}{3} ( \frac{ - 1}{3} ) \\ \\ 27 - 9 - ( - \frac{1}{9} ) \\ \\ 27 - 9 + \frac{1}{9} \\ \\ \frac{243 - 81 + 1}{9} \\ \\ = \frac{163}{9} = 18.1 = 18 \frac{1}{9} [/tex]
I hope I helped you^_^
2x^2(6x^3-3x+1) need help
Answer:
12x^5-6x^3+2x^2
Step-by-step explanation:
9516x 51 plz put steps
Answer:
9516
x51
9516 (first multiply by 9561 by 1)
47580 (second multiply 9561 by 5)
485316 (add two result.)
9516+47580=57096 this is wrong.we add 9516+47580 with shift one space of 47580Step-by-step explanation:
i don’t understand at all
Answer:
26
Step-by-step explanation:
It says find f(f(2)), so we need to find f(2) and then input that into the same function. f(2)=5 so then we input that into the function again and get 26. Boom.
Answer:
26
Step-by-step explanation:
Ok first u find f(2) so for that u have to input 2 into the value of x. So 2^2 +1 =5
When we get 5 we input THAT into f(x)
So:
F(5) = 5^2 +1
=26
Can you factor x² + 9?
Answer:
x square + 3 Square
(x + 3)square
X Square + 3 Square + 2x3
A dance academy charges $24 per class and a one time registration fee of $15. A student paid a total of $687 to the academy. Find the number of classes the student took.
Answer:
The student took 28 classes
Step-by-step explanation:
What I did was minus $15 from the $687 total, cause $15 is only a one time registration fee, then 687-15=672, so then I divided 672 by the cost per class, so $24, 672 divided by 24 equals to 28, so the student took 28 classes.
Please help!! Due tm! NO LINK
Ans4
Step-by-step explanation:
Step-by-step explanation:
25 . f (-6) = 7
26 . f (0) = -2
27 . x = 2
28 . x = -4
Helppppppppppppppppppppp!
Answer:
x = 11
Step-by-step explanation:
if we need to find the value of x then we need to
5x + 10 = 65 ( Vertically opposite angles are same )
5x = 65 -10
5x = 55
x = 55/5
x = 11
Answer:
x=11
Step-by-step explanation:
5x+10=65
5x=65-10
5x=55
5x÷5=55÷5
x=11
-7x-3x+2=-8x-8 solve the equation for the variable show work
Answer:
sorry man
Step-by-step explanation:
iguess dhejwjsjsj
What percentage of households in the survey have four or more televisions?
Answer:
2.5% ?
Step-by-step explanation:
.025 as percentage is 2.5%
-8x+44>60 and -4x+50<58
-8x + 44 > 60
-8x > 60 - 44
-8x > 16 / : (-8)
x < -2
-4x + 50 < 58
-4x < 58 - 50
-4x < 8 / : (-4)
x > -2
The actual distance between A and B is 960 metres.
a) Work out the scale on the map. Give your answer in the form 1:n
b) Work out the actual distance between A and C in kilometres. Your final line must say, AC = ... km
Answer:
Step-by-step explanation:
a. 960 / 4 = 240 for 1 grid
1/2 cm = 24000
1 : 48000
b. A to C
AC² = 3² + 6²
AC² = 9 + 36
AC²= 432 + 1728
AC² = 2160
AC = √2160 km
Find Cp ox s.p. in each of the following..
C. P = Rs.500 , Profit = Rs. 170 Solution,
Step-by-step explanation:
Solution:
Here,
C.P.=Rs 500
Profit=Rs 170
Now,
S.P.=C.P.+Profit
=Rs 500+170
=Rs 670
Keep smiling and hope u r satisfied with my answer.Have a great day :)
Lawrence spent $1.89 on a bottle of paint and $0.45 on a brush. What was the total amount he spent? Use the model to help you.
Need some help with this please
find the value of a if the line joining the points (3a,4) and (a,-3) has a gradient of 1
Recall that the slope or gradient of a line segment through two points is the ratio of the change in the y coordinate to the change in the x coordinate.
If the gradient is 1, then
1 = (-3 - 4) / (a - 3a)
Solve for a :
1 = -7 / (-2a)
1 = 7/(2a)
2a = 7
a = 7/2
please help!!!!!
what is -x+2x???
5.346 - 2.289 = ?
SHOW WORK
WILL GIVE BRAINLIEST PLEASE
Answer:
7.635
Step-by-step explanation:
1 1
|5| . |3| |4| |6|
+ |2| . |2| |8| |9|
--------------------------------------------------------
|7| . |6| |3|
noboboboobobovobobnaoakspapsls
How to solve 0.6 divided by 30
Please help!!!!!!!!!!!!!!
Step-by-step explanation:
[tex] {40}^{ \frac{1}{2} } and \: 2 \sqrt{10} [/tex]
What is the height of a triangle with an area of 32 cm2
and a base of 8 cm?
Answer:
8 32 A for area and H for height
Step-by-step explanation:
There are 60,659 people under the age of 14 years old
There are 215,927 people age between 15 and 64 years old
There are 36,610 people over the age of 65 years old
What is the Old Age Dependency Ratio as a decimal rounded to
the Thousandths place?
Answer:
(2,800/1,500) * 100 = 187%
Step-by-step explanation:
What is the range of the function on the graph
all real numbers
all real numbers less than or equal to 1
all real numbers less than or equal to 3
all real numbers less than or equal to 0
Marks and con
Save and Exit
Det
Submit
Answer:
where is the graph
Step-by-step explanation: