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3 years ago

5

How many ounces of 20% hydrochloric acid and 70% hydrochloric acid must be mixed to obtain 20 ounces of 50% hydrochloric acid so

lution?

1 answer:

Sliva [168]3 years ago

5 0

I can’t solve it sorry....................................................<3

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The basketball court is 94 feet long how many inches is the length of the court

Lana71 [14]

Answer:

1,128

Step-by-step explanation:

94 x 12 = 1,128

what hy7h7yh

8 0

3 years ago

Read 2 more answers

1. 14=7b<br> 2. -11=k/4<br> 3.6z=-6

Romashka-Z-Leto [24]

Answer:

the anwer is 14-2294-dhi2

Step-by-step explanation:

Because 14 is - 4 you multiple to 5 equal= dhi2

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2 years ago

Thirty-three college freshmen were randomly selected for an on-campus survey at their university. The participants' mean GPA was

Ivan

Answer: $\pm0.1706$

Step-by-step explanation:

Given : Sample size : n= 33

Critical value for significance level of $\alpha:0.05$ : $z_{\alpha/2}= 1.96$

Sample mean : $\overline{x}=2.5$

Standard deviation : $\sigma= 0.5$

We assume that this is a normal distribution.

Margin of error : $E=\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

i.e. $E=\pm (1.96)\dfrac{0.5}{\sqrt{33}}=\pm0.170596102837\approx\pm0.1706$

Hence, the margin of error is $\pm0.1706$

7 0

3 years ago

NEED ANSWER FAST. 8th grade math

Kipish [7]

Answer: C

I can’t explain it very well, but the answer is C

6 0

3 years ago

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What is the solution to the system of equations? Use the substitution method.

BabaBlast [244]

The answer is:
4x+2y=11} 4x+2y=11} x=2-2y
x-2=-2y } x+2y=2 } x=2-2(-3/6)
x=2-(-6/6)
4(2-2y)+2y=11 x=2-(-1)
8-8y+2y=11 x=3
8-6y=11
-6y=11-8
-6y=3/-6
y=-3/6=-1/2

So for my opinion the solution is A.(3,-1/2)

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3 years ago