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umka21 [38]
3 years ago
9

PLZ HELP WITH MATH! BRAINLIEST! GO TO MY PROFILE AND ANSWER THE MATH QUESTION... it would make my day

Mathematics
1 answer:
ale4655 [162]3 years ago
4 0

Answer: I got u

Step-by-step explanation:

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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
What is 125.1 ÷ 6 and if you do how do you do it?
Mariana [72]

ans = 20.85

hope it helps...!!!

8 0
2 years ago
Subtract:(40+9)-(30+2)
Georgia [21]

Answer:

17

Step-by-step explanation:

49-32=17

Cud u make me brainliest? Im desperate. Thanks!

Hope this helps!

4 0
3 years ago
Read 2 more answers
the same cafe uses 18.5 cups of flour to make 100 servings of pancakes.how many cups of flour are in one serving of pancakes?
FinnZ [79.3K]
About 5.4, it's 100 divided by 18.5
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3 years ago
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(b12)3<br> The simplified expression is
AlexFokin [52]

Answer:

b^36

Step-by-step explanation:

8 0
3 years ago
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