2 years ago

Solve for the variable. if necessary, round to the nearest tenth.

Mathematics

1 answer:

Yanka [14]2 years ago

7 0

Answer:

b. 8 is the correct answet it's clearly

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When salt and water are combined, they form a salt or saline solution. How much ml of water must be added to 150 mL of an 80% sa

Vinvika [58]

Answer:

We must add 400 ml of water.

Step-by-step explanation:

We can use the following equation:

$C_{i}V_{i}=C_{f}V_{f}$

Where:

C(i) is the initial concentration of the solution (80%)
C(f) is the final concentration of the solution (30%)
V(i) is the initial volume (150 ml)
V(f) is the final volume

Now, we just need to solve the equation for V(f).

$V_{f}=\frac{C_{i}V_{i}}{C_{f}}$

$V_{f}=\frac{80*150}{30}$

$V_{f}=400\: ml$

Therefore, we must add 400 ml of water.

I hope it helps you!

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18. What is the<br> y = -2x + 7<br> y = -3

sp2606 [1]

Answer:

what is x?

Step-by-step explanation:

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(8.4x10^3)-(6.4x10^2)<br> Write anserr in scientific notation

Alex_Xolod [135]

I think the answer is 2x10^1

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3 years ago

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Need help with this question

Lemur [1.5K]

X=95°(right opposite angle)

As X is right opposite to 95°,meaning that it would be 95° as well.
Please do remember that any angles that are right opposite to each other would be equal.

hope it helps!

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A Metal rod is 7/8 m long it will be cut into pieces that are each 1/56 meters long how many pieces will be made from the road ?

Katen [24]

Namely, how many times does 1/56 go into 7/8? well, let's check

$\bf \cfrac{\quad \frac{7}{8}\quad }{\frac{1}{56}}\implies \cfrac{7}{8}\cdot \cfrac{56}{1}\implies \cfrac{7}{\underline{8}}\cdot \cfrac{\underline{8}\cdot 7}{1}\implies \cfrac{49}{1}\implies 49$

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