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inysia [295]
2 years ago
13

9) EASY POINTS WILL GIVE BRAINLIST TO BEST ANSWERS

Mathematics
2 answers:
Simora [160]2 years ago
7 0
1(5) + 4(X) = 25
5 + 4X = 25
subtract 5 from both sides
4X = 25 - 5
4X= 20
divide both sides by 4
X = 20/4
x=5
Each eraser cost 5$
ra1l [238]2 years ago
3 0
You bought a magazine for $5 and four erasers. you spent a total of $25.

Magazine cost: 5$ each
Eraser cost: X$ each

Total cost is the number of items (1 magazine) times the cost of each item (5$). We don't know the cost of each eraser, so we represent that using a variable, X.

1(5) + 4(X) = 25

5 + 4X = 25

subtract 5 from both sides

4X = 25 - 5

4X = 20

divide both sides by 4

X = 20/4

X = 5

Each eraser cost 5$
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How do I solve this?? I'm lost
Alekssandra [29.7K]
Your insight that the function values differ by 5 every time is very important. So your f(x) will contain 5x as a term. You have to find a constant to add or subtract to make sure f(1)=-2.

f(x) = 5x-7 does the job.
7 0
3 years ago
Please help me out with this!!!!!!!
Bad White [126]

Answer:

A

Step-by-step explanation:

The line on the right has equation y = x + 1

The absolute value function always gives a positive value

Thus the equation is y = | x + 1 | → A

3 0
3 years ago
Your grandfather gave you $1.65 with
Lelu [443]

Answer:

$1.98

Step-by-step explanation:

1.65/5=0.33

1.65+0.33=1.98

check: 1.98/6 =0.33

0.33x5=1.65

5 0
3 years ago
Read 2 more answers
PLEASE HELP
Savatey [412]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
Suppose that y varies directly with x, and y=3 when x=8
spayn [35]

we are given

y varies directly with x

so, we can write equation as

y=kx

where

k is a constant

now, we need to find k

we are given

y=3 when x=8

so, we can plug it and find k

3=k*8

k=\frac{3}{8}

now, we can plug it back

y=\frac{3}{8}x

(A)

we have got equation as

y=\frac{3}{8}x

for finding inverse , we can switch x and y

x=\frac{3}{8}y

now, we can solve for y

8*x=8*\frac{3}{8}y

8*x=3y

f^{-1}(x)=\frac{8x}{3}............Answer

(B)

we have

y=\frac{3}{8}x

we can plug x=4 and find y

y=\frac{3}{8}*4

y=\frac{3}{2}................Answer

4 0
3 years ago
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