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lesya [120]
3 years ago
7

150 copies will cost $15.00. What is the Unit Rate?

Mathematics
1 answer:
serg [7]3 years ago
4 0
Of 150 copies cost $15, one copy costs $0.1
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Suppose y varies jointly as x and z. Find y when x = –13 and z = 7, if y = 205 when x = –5 and z = –8. Round your answer to the
lesya692 [45]

Answer: y = - 466.375

Step-by-step explanation:

y varies jointly as x and z.

This means that y varies directly as x and also varies directly as z.

In order to remove the proportionality symbol, we will introduce a constant of proportionality, k. Therefore,

y = kxz

The next step is to determine the value of k

if y = 205 when x = –5 and z = –8.

we will substitute these values into the equation to determine k.

205 = k × -5 × -8

205 = 40k

k = 205/40 = 5.125

Therefore, the equation becomes

y = 5.125xz

We want to determine y when x = - 13 and z = 7

y = 5.125 × - 13 × 7

y = 5.125 × - 91

y = - 466.375

3 0
3 years ago
Lara charges $12 per hour for babysitting. If f represents Lara's total fee after babysitting for h hours, which answer choice s
Yuliya22 [10]

Answer:

Can't really read that but these would work

f = 12h

h = f/12

Step-by-step explanation:

4 0
2 years ago
Which number goes in the blank?
uranmaximum [27]

Answer:

A

Step-by-step explanation:

842,109 is bigger then 842,019

8 0
2 years ago
3 1/3 percent as a fraction
vekshin1

Answer:

10/3

Explanation:

3*3+1 = 10 over the denominator

Mark brainliest please :)

7 0
3 years ago
Read 2 more answers
HELP DUE IN 10 MINS! Solve for x in the parallelogram below:<br><br> x=??
slavikrds [6]

Answer:

x = 10

Step-by-step explanation:

The opposite angles in a parallelogram are congruent, then

5x - 9 = 3x + 11 ( subtract 3x from both sides )

2x - 9 = 11 ( add 9 to both sides )

2x = 20 ( divide both sides by 2 )

x = 10

6 0
2 years ago
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