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docker41 [41]
3 years ago
13

Lisa studies 5 hours for a particular test and gets a score of 77. At this rate, how many hours would she have to study to get a

score of 99?
Mathematics
1 answer:
Murljashka [212]3 years ago
4 0
77/5=99/x
77x=5*99
77x=495
x=495/77
x=6.4
she needs to study 6.4 hrs to get 99
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an 18-foot wire is to be cut so that the longer piece is 5 times longer than the shorter piece. find the length of each peice
gtnhenbr [62]

Answer:

The longer piece is 15 feet long and the shorter piece is 3 feet long.

Step-by-step explanation:

Create a system of equations where x is the length of the longer piece and y is the length of the shorter piece:

x + y = 18

x = 5y

Solve by substitution by substituting 5y as x into the first equation:

x + y = 18

5y + y = 18

Solve for y:

6y = 18

y = 3

So, the shorter piece is 3 feet long. Since the longer piece is 5 times longer, find its length by multiplying this by 5:

3(5)

= 15

So, the longer piece is 15 feet long.

The longer piece is 15 feet long and the shorter piece is 3 feet long.

7 0
3 years ago
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Answer:

1) d < -2

2) b < 3

Step-by-step explanation:

1) d+3< 1

subtract both sides by 3

d+3 -3 < 1-3

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2) b+6< 9

subtract both sides by 6

b+6 -6 < 9 -6

b< 3

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2 years ago
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Answer:

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Step-by-step explanation:

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OLEGan [10]
1. slope of the given line = 1/5
    the equation is 
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    the equation is
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3 years ago
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