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wariber [46]
3 years ago
12

the perimeter of a rectangular swimming pool is 30 meters the width of the pool is 3 meters less than its length find the width

of the swimming pool
Mathematics
2 answers:
Alexxx [7]3 years ago
7 0
6 is the answer hope I could help
shtirl [24]3 years ago
3 0
6*2=12
9*2=18
18+12=30

the answer is 6
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pls help me with this i’ve been stuck on it for a while but i did it on paper and it doesn’t look right
inn [45]

i will fill the boxes from top down

4(-2)-5=-13

4(1)-5=-1

4(2)-5=3

4(3)-5=7

5 0
3 years ago
A geography teacher shares 18 maps equally between 8 students. The number of maps that each student gets lies between what two w
Serga [27]
I believe it is 2 and 3.
8 0
3 years ago
Can you explain step by step for #15 and #16 I have a test on this tomorrow
RUDIKE [14]

Answer:

15.

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

16. 10 ml of 20% saline and 40 ml of 10% saline

Step-by-step explanation:

A chemist takes x ml of 20% saline and y ml of 10% saline. In total, he takes

x + y ml that is 50 ml, so

x + y = 50.

There are  0.2x ml of salt in x ml of 20% saline and 0.1y ml of salt in 10% saline. There are 0.12\cdot 50=6 ml of salt in 50 ml of 12% saline. Thus,

0.2x+0.1y=6

15. We get the system of two equations:

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

16. Solve this system. From the first equation:

x=50-y

Substitute it into the second equation:

0.2(50-y)+0.1y=6\\ \\10-0.2y+0.1y=6\\ \\-0.1y=6-10\\ \\-0.1y=-4\\ \\y=40\\ \\x=50-y=50-40=10

7 0
3 years ago
Number sentences for these 4?
Murrr4er [49]
A. 15-35=-20
b. -2+7=5
c. -10+14=4
d. 60-100=-40
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3 years ago
I need help with number 15,16,and 17
777dan777 [17]
15. A=7, 16. V=9, 17. D=26
7 0
3 years ago
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