All categories

3 years ago

A first number plus twice a second number is 24. twice the first number plus the second totals 21. find the numbers.

1 answer:

4 0

We do like the following:
Set the first number is a and the second is b.
We have two equations: a+2xb=24, 2xa+b=21
And we have 2xa+4xb=48 or 2xa=48-4xb
So: 48-4xb+b=21 or -3xb=21-48=-27 and we got b=-27:(-3)=9 and a= 6
a=6 and b=9

You might be interested in

What is the slope of a line that goes through (0,6) and (6,0)

vazorg [7]

(x1,y1)=(0,6)
(x2,y2)=(6,0)
slope=(0-6)/(6-0)=0

3 0

3 years ago

Solve eqaution 15m+22=-7m+18

lilavasa [31]

It will beee 22/4 :)....

7 0

2 years ago

Read 2 more answers

How many liters are in 120 kiloliters

Natali [406]

6 is your answer, hope it helped

8 0

3 years ago

Read 2 more answers

The Rumpart family is building a new room onto their house. The width of the new room will be 16 feet. The length of the room wi

QveST [7]

Answer:

$\text{The length of new room}=16.64\text{ feet}$

$\text{Area of the new room}=266.24\text{ feet}^2$

Step-by-step explanation:

We have been given that the Rumpart family is building a new room onto their house. The width of the new room will be 16 feet.

The length of the room will be 4% greater than the width. This means that length of new room will be 16 feet plus 4% of 16.

$\text{The length of new room}=16+(\frac{4}{100}*16)$

$\text{The length of new room}=16+(0.04*16)$

$\text{The length of new room}=16+0.64$

$\text{The length of new room}=16.64$

Therefore, the expression $16+(0.04*16)$ represents the length of new room and the length of new room is 16.64 feet.

Since we know that area of a rectangular shape is width times length.

$\text{Area of rectangle}=\text{Length*Width}$

$\text{Area of the new room}=16\text{ feet}\times 16.64\text{ feet}$

$\text{Area of the new room}=266.24\text{ feet}^2$

Therefore, the area of the new room will be 266.24 square feet.

5 0

3 years ago

Is jk the same length as kl? make sure you have mathematical proof to support your answer

lutik1710 [3]

Yes jk and kl are the same length because if you count the amount of units they reach from the first point to the last they both are 3 squared units/units how ever you want to call it.

7 0

2 years ago