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geniusboy [140]

3 years ago

8

A scientist needs 10mL of a 17% acid solution for an experiment. The lab has available a 20% solution and a 10% solution. How ma

ny milliliters of the 20% solution and how many milliliters of the 10% solution should the scientist mix to make the 15% solution?

1 answer:

DiKsa [7]3 years ago

6 0

This is hard help get it from google or something

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Cindy spends 2 hours doing English, Geometry and History homework. It takes her 35 minutes to do English homework and 55 minutes

Vikki [24]

Ok! So first, 2 hours are 120 minutes and 55 + 35 = 90
120 - 90 = 30
So the answer is A. Cindy spends 30 minutes on History
Hope it helps!

4 0

3 years ago

The shorter leg of a 30 60 90 triangle is 6.4 inches long. Find the perimeter.

kogti [31]

The perimeter is 38.4 inches

8 0

3 years ago

Which expression has the sum of twenty six twentieths?

weeeeeb [17]

The first one ://////)

7 0

3 years ago

Read 2 more answers

Solve for W <br> 4w^2+9w= -2

7nadin3 [17]

Answer:

$w_1=-\frac{1}{4},w_2=-2}$

Step-by-step explanation:

$4w^2+9w=-2$

$4w^2+9w+2=0$

$w^2+9w+8=0$

$(w+1)(w+8)=0$

$(4w+1)(w+2)=0$

$w_1=-\frac{1}{4},w_2=-2}$

3 0

2 years ago

The expression 21 - (2x + 3)2 + 4 (1 - 1) + z3 can be simplified into the form

mr Goodwill [35]

Answer:

A=z

B=-2

C=0

D=30

Step-by-step explanation:

First lets simply the equation

21 - (2x +3)2 + 4(1-1) + z^3

21 - (2x^2 + 9) + 4(0) + z ^3

21 - 2x^2 + 9 + z^3

- 2x^2 + z ^3 + 30

This means that:

A=z

B=-2

C=0

D=30

5 0

3 years ago