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3 years ago

What is -9+8x=-10y equals

Mathematics

1 answer:

dlinn [17]3 years ago

6 0

Your answer would be Y=-8x-9/10

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Jon recently drove to visit his parents who live 280 miles away. On his way there his average speed was 9 miles per hour faster

Luba_88 [7]

Answer:

11 mph and 20 mph

Step-by-step explanation:

Represent his average speed going by r1 and his average speed returning by r2. We know that r1 = r2 + 9.

Recall that distance = rate times time, so time = distance / rate.

Time spent going was (280 mi) / r1, or (280 mi) / (r2 + 9 mph).

Time spend returning was (280 mi) / r2.

The total time was 14 hrs, so (280 mi) / (r2 + 9 mph) + (280 mi) / r2 = 14 hrs

Note that there is only one variable here: r2. Find r2, and then from r2, find r1:

Dividing all 3 terms by 14 hrs yields:

20 20

---------- + ----------- = 1

r2 + 9 r2

The LCD here is r2(r2 + 9). Thus, we have:

20r2 (r2 + 9)(r2)

------------------- = 1 or ------------------

(r2 + 9)(r2) (r2 + 9)(r2)

Then 20(r2) = (r2)^2 + 9(r2). This is reducible by dividing all terms by r2:

20 = r2 + 9, or 11 = r2. Then r1 = 11 + 9, or 20.

The two rates were 11 mph and 20 mph.

8 0

3 years ago

Find the circumference for 6 and 8

Naya [18.7K]

Answer:
6. 98.01
8. 32.04

5 0

3 years ago

What is the square root of 144444444453?

ale4655 [162]

Answer:

380058.475044

3 0

3 years ago

Read 2 more answers

The distance around a circular lampshade is 219.8 mm. If Gail measures straight across the center of the lampshade from one side

fredd [130]

Answer: Longest distance she could measure is 70 mm

Step-by-step explanation:

To find the longest distance from one side to other across the center we have to find the diameter of the lampshade.

As it is given that the distance around the lampshade is 219.8 mm which is equal to the circumference of the lampshade.

Circumference of the lampshade is $=$ πD, where D is the diameter of the lampshade

$219.8= 3.14D$ where the value of π=3.14

Divide both sides by 3.14 we get

$\frac{219.8}{3.14} = D$

on solving we get

$D = 70$

5 0

3 years ago

Read 2 more answers

Plz tell me the answer!!!!

Anestetic [448]

Monday and Wednesday since they both round to 1.45

7 0

3 years ago