3 years ago

This answer is the one I need to know

Mathematics

1 answer:

spayn [35]3 years ago

3 0

The answers for the problems are: 6. -18
9. 6
12. -40

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It’s linear so you map out the first differences and then put it into y=Mx+b form. For the you gotta find the y intercept

Alika [10]

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Let's find the slope (m) :

$\dfrac{y2 - y1}{x2 - x1}$

$\dfrac{16 - 11}{9 - 6}$

$\dfrac{5}{3}$

slope of given line is 5/3

now, let's plug the value of coordinates of a point lying on the line ( for example : (6 , 11) and slope (m) to find the y - intercept (c) :

$y = mx + c$

$11 = \bigg(\dfrac{5}{ 3} \times 6 \bigg) + c$

$11 = (5 \times 2) + c$

$11 = 10 + c$

$c = 11 - 10$

$c = 1$

value of y - intercept (c) = 1, so our equation will be :

$y = mx + c$

$y = \dfrac{5}{3}x + 1$

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2 years ago

If 1 mile equals 5280 feet and an escalator moves at a rate of 2 feet per second. At what rate does the escalator move in miles

Sever21 [200]

Ratio=2 ft/s
ratio=2 ft/s * (1 mile / 5280 ft)*(3600 s / 1 h)=1.36363636.. miles/h≈1.36 miles/h.

Answer: 1.36 miles/h

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A submarine dives 750 feet every 5 minutes and 4,500 feet every 30 minutes. Find the constant rate at which the submarine dives.

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Answer:

150 feet per minute

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7 more than d is equal to 19

galben [10]

7+d=19 is the answer

subtract 7 from each side d=19-7

d=12

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