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2 years ago

How many do u wanna bet nobody on this app is not going to help me on this question

Mathematics

1 answer:

Vika [28.1K]2 years ago

5 0

The last one :))))))))))

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A student has a 2% salt water solution and a 7% salt water solution. To best imitate salt water at a local beach, he needs 1 lit

FromTheMoon [43]

Let

x-------> the amount of $2\%$ solution

y--------> the amount of $7\%$ solution

we know that

$2\%=0.02\\7\%=0.07\\3.5\%=0.035$

$x+y=1$

$y=1-x$ -------> equation A

$0.02x+0.07y=0.035$ -------> equation B

substitute equation A in equation B

$0.02x+0.07(1-x)=0.035$

$0.02x+0.07-0.07x=0.035$

$0.05x=0.035$

$x=0.7\ liters$

find the value of y

$y=1-x$

$y=1-0.7=0.3\ liters$

therefore

The student need $0.7\ liters$ of $2\%$ solution and $0.3\ liters$ of $7\%$ solution

<u>the answer is</u>

A) The percent values were written incorrectly in the equation

B) The amount of 7% solution should be written as 1 – x, not x – 1.

8 0

2 years ago

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Can someone please help me

Vikki [24]

$16(4 shirts)= $64
5%=$64(0.05)=$3.20
Jamal's total is $67.20

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2 years ago

HELPPPPPPP PLZZZZ I DONT GET IT

expeople1 [14]

Answer:

See below

Step-by-step explanation:

$1) \: \frac{1}{2} \times 5 \times 6 = 15 \: {cm}^{2} \\ \\ 2) \: \frac{1}{2} \times 10 \times 6 = 30 \: {cm}^{2} \\ \\ 3) \: 5 \times 3 = 15 \: {cm}^{2} \\ \\ 4) \: 10 \times 6= 60\: {cm}^{2}$

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2 years ago

Triple a number divided by 5

hjlf

I think 15 is the answer I’m not sure tho

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3 years ago

Help plz ill give extra points

Alecsey [184]

Answer: Point B

Point B is above (-2, -1)

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2 years ago

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