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Vlad1618 [11]
3 years ago
11

The length of a solar car race track is supposed to be 4.8 meters.

Mathematics
1 answer:
snow_tiger [21]3 years ago
7 0

Answer:

  -12.5%

Step-by-step explanation:

A percentage change is computed using ...

  percent change = ((new amount) -(original amount))/(original amount) × 100%

We want to find the percentage change from 4.8 m, so we have ...

  percent change = (4.2 -4.8)/4.8 × 100% = -.6/4.8×100% = -12.5%

The carpenter made the track 12.5% too short.

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Read 2 more answers
X = – 2y – 1<br> x = – 5y + 5
motikmotik

Answer:

x = -5

y = 2

Step-by-step explanation:

x = – 2y – 1

= -x - 2y - 1

-x - 2y = 1

x = – 5y + 5

= -x - 5y + 5

-x - 5y = -5

-x - 2y = 1

-x - 5y = -5

___________--

3y = 6

y = 6/3

<u>y = 2</u>

-x - 2y = 1

-x - 2(2) = 1

-x - 4 = 1

-x = 1 + 4

-x = 5

<u>x = -5</u>

6 0
3 years ago
A pouch contains 6 red marbles and 2 blue marbles. A second pouch contains 3 red marbles and 7 blue marbles. A marble will be dr
aksik [14]

Answer:

2/8

Step-by-step explanation:

because there are 2 blue marbles

add those up with the red marbles(6) and you get 8 marbles. But the chance for picking up a blue marble would be 2/8

4 0
3 years ago
Olga worked 37.5 hours last week at the library and earned 12.50 an hour.if she gets a 2.50 per hour raise,how many hours will s
ruslelena [56]

Olga worked 37.5 hours last week and earned $12.50 an hour.

[ h = the number of hours              y = total earnings ]

12.50h = y

12.50(37.5) = y

468.75 = y

She earned $468.75 last week


If she gets a $2.50 per hour raise:

12.50 + 2.50 = 15.00

She gets $15 per hour.

How many hours will she have to work to make $468.75?


15h = 468.75        Divide 15 on both sides to get "h" by itself

h = 31.25


She needs to work 31.25 hours

4 0
3 years ago
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