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3 years ago

15

A plane pencil and a colored pencil together cost 30 cents The colored pencil cost 10 Cents more then the plane pencil how

much does each cost

1 answer:

Serjik [45]3 years ago

8 0

Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents

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one number is equal to the square of another. find the numbers if both are positive and their sum is 1122

statuscvo [17]

Answer:

One number is 561

The other number is 23.6854

Step-by-step explanation:

x = y^2 One number = the square of another

x + y^2 = 1122 The sum of the two numbers is 1122

Substitute y^2 in for x on the second equation.

y^2 + y^2 = 1122 Combine like terms on the left

2y^2 = 1122 Divide by 2

y^2 = 1122/2

y^2 = 561 Take the square root of both sides.

y = 23.6854

x = y^2

x = 561

y^2 = 561

4 0

3 years ago

18. When y = x?, which of the following expressions is<br> equivalent to -y ?

vitfil [10]

Answer:

-y=-x

The problem:

y=x then -y=?

Step-by-step explanation:

If y=x, then -y=-x.

Just like if u=9, then -u=-9.

Or, if -m=8, then m=-8.

5 0

3 years ago

Find the distance between the pair of points.<br> (21,18) and (-20, -19)<br> The distance is

True [87]

Answer: answer in pic

55.2

Plz mark me brainliest

6 0

3 years ago

John drives to the beach which is 270 miles away. In 2 hours he drives 10 miles. If he continues at the speed, how long will it

Digiron [165]

1 hr = 5 miles
270 ÷ 5 = 54 hrs

8 0

3 years ago

Which data set has the widest spread? A. data set A: 1, 1, 2, 1, 2, 1 B. data set B: 2, 2, 4, 4, 3, 3 C. data set C: 1, 1, 2, 2,

OlgaM077 [116]

Answer:

C

Step-by-step explanation:

7

4 0

3 years ago