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astraxan [27]
3 years ago
14

Simplify the expression b - 7 + b - 8

Mathematics
1 answer:
natulia [17]3 years ago
3 0

Answer:

2b - 15

Step-by-step explanation:

b - 7 + b - 8  

You combined the two b's correctly, but didn't combine the two constants, -7 and -8.  

Those combine to   -7 + (-8)  = -7 - 8  = -15,  so the final answer is

2b - 15

you have -7 and are subtracting 8 more, so you are moving 8 units left on the number line, so it has to get more negative.

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Luna is making a rope ladder. Each step of the ladder is 2 1/3 feet wide and uses an additional 1/2 foot on each end of the step
koban [17]

By taking the quotient between the total length and the length needed for each step, we conclude that Luna can make 9 steps.

<h3>How many steps can she make from the rope?</h3>

To find this, we need to take the quotient between the total length of the rope and the length needed for each step.

She has a total length of 30ft.

For each step she needs (2 + 1/3) ft plus (1/2) ft for each knot, and there are two knots, then each step needs: (2 + 1/3)ft + 2*(1/2)ft = (3 + 1/3) ft.

Then the number of steps that can be made is:

N = (30 ft)/(3 + 1/3) ft. = 9

She can make 9 steps or the lader.

If you want to learn more about quotients:

brainly.com/question/8952483

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6 0
1 year ago
A gardener has 10 pounds of soil. He used 58 of the soil for his garden. How many pounds of soil did he use in his garden?
mars1129 [50]

Answer:

Step-by-step explanation:

58% of 10 pounds = 0.58 × 10 pounds = 5.8 pounds

8 0
3 years ago
Dr Wellbee advised his patients to drink 8 eight-ounce glasses of water everyday for every 50 pounds of weight. Kelby drank 168
BlackZzzverrR [31]
Kelby drank 168 glasses of water per week
i.e 24 glasses per day

Since 8  eight-ounce glass of water is for every 50 pounds.
1 eight-ounce glass is for = 50/8 pounds
and 24 glasses of water is for = 50*24/8
= 150pounds

So kelby probably weighs 150 pounds
3 0
3 years ago
Answer pls<br> thank you
frosja888 [35]

Answer:

d = 5/6t

Step-by-step explanation:

5 stories every 6 seconds

at 12 seconds, it would have travelled 10 seconds.

using this 2 data in this formula

(y-y1)/(x-x1) = (y2-y1)/(x2-x1)

Note : d = y, t = x;

d1 = 5, t1 = 6, d2 = 10, t2 = 12

we have

(d - 5)/(t-6) = (10-5)/(12-6)

(d - 5)/(t-6) = 5/6

d = 5/6(t-6) + 5

d = 5/6t -5+5

d = 5/6t

7 0
2 years ago
If s = 1 over 4 unit and A = 80s2, what is the value of A, in square units? square unit(s). (Input whole number only.) (1 point)
9966 [12]

Answer:

7

Step-by-step explanation:

3 0
3 years ago
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