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mestny [16]
2 years ago
12

Find two numbers such that one number is 3 less than twice as big as the other number and the two numbers sum to 21.

Mathematics
1 answer:
Hitman42 [59]2 years ago
8 0

Answer:

The two numbers are:

8 and 13

Step-by-step explanation:

a = 2b - 3       Eq. 1

a + b = 21        Eq. 2

Replacing Eq. 1 in Eq. 2:

(2b-3) + b = 21

3b - 3 = 21

3b = 21 + 3

3b = 24

b = 24/3

b = 8

from Eq. 1

a = 2*8 - 3

a = 16 - 3

a = 13

Check:

From Eq. 2:

a + b = 21

13 + 8 = 21

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3 years ago
There is 1/4 of a birthday cake left over. If 4 friends share it equally, what fraction of the entire cake will each friend rece
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3 years ago
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The accompanying diagram show a cross-section of a rectangular pyramid. The cross sectional area is 36in and is 3 inches from th
LiRa [457]

The area of the rectangular base is the amount of space on the rectangular base

The area of the rectangular base is 60 square inches

<h3>How to determine the area of the rectangular base?</h3>

The question is incomplete; as the diagram is not given.

So, I will apply the concept of similar shapes to determine the area of the rectangular base

To determine the area of the rectangular base, we make use of the following equivalent ratio:

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This gives

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Express as fraction

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3 0
2 years ago
Find YQ if MQ = 3x-3 and YQ = 2x-6.
Alina [70]

Answer:

• Assume Q is a mid point of line MY

{ \underline{ \sf{ \:  _{l} M \:  \:  \:  \:  \:  \:  \:  \:  _{l} Q \:  \:  \:  \:  \:  \:  \:  \:  _{l}Y}}}

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2 years ago
What is the value of x? <br> enter your answer in the box
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Answer:

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Subtract 3x from each side

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Add 10 to each side

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