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Jlenok [28]
2 years ago
6

Help will give branliest 15 pointss..

Mathematics
2 answers:
Ber [7]2 years ago
7 0

Answer:

x = 3

Step-by-step explanation:

2x + 3 = 9

2(3) + 3 = 9

6 + 3 = 9

Hope this helps!

=)

svp [43]2 years ago
7 0

Answer: x=4

Step-by-step explanation: do the problem backward. 9-3=6, 6 divided by 2 is 4.

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You need 660 mL of a 40% alcohol solution. On hand, you have 35% alcohol mixture. You also have a 95% alcohol mixture. How much
ozzi

Answer:

A. 605 mL of the 35% solution

B. 55 mL of the 95% solution

Step-by-step explanation:

It is given that, you need 660 mL of a 40% alcohol solution. On hand, you have 35% alcohol mixture. You also have a 95% alcohol mixture.

Let x and y be the amount of 35% alcohol solution and 95% alcohol solution (in mL) respectively.

So,

Amount equation: x+y=660        ...(1)

Alcohol equation : 0.35x+0.95y=0.40(660)\Rightarrow 0.35x+0.95y=264     ...(2)

On solving (1) and (2), we get

0.35(660-y)+0.95y=264

231-0.35y+0.95y=264

0.6y=264-231

y=\dfrac{33}{0.6}

y=55

Now, substitute y=55 in (1).

x+55=660  

x=660-55  

x=605  

Therefore, we need 605 mL of the 35% solution  and 55 mL of the 95% solution.

4 0
3 years ago
How do you solve <br> -32+2a=0
Semmy [17]
If you're solving for a, you would add 32 to both sides
2a=32
then you would divide by 2
a=16
6 0
3 years ago
Read 2 more answers
Rhion sat maths and English test
Sauron [17]

Answer:

Rhion did better in maths test.

Step-by-step explanation:

Given that:

Rhion scored 14 out of 17.

We will find percentage and then compare them.

Percentage = \frac{Score}{Total\ marks}*100

Percentage = \frac{14}{17}*100

Percentage = 82.35%

Rhion scored 31 out of 39.

Percentage = \frac{31}{39}*100

Percentage = 79.48

On comparing,

82.35 > 79.48

Hence,

Rhion did better in maths test.

4 0
2 years ago
Gene has a pocket full of quarters and dimes that amount to 2.45$
Hatshy [7]

Answer:

Is that the full question? I think some of it is missing.

7 0
3 years ago
Prove that (AxB).(BxC)+(BxC).(AxD)+(CxA).(BxD)=0
shepuryov [24]

Answer:

I assume you're joking.

Step-by-step explanation:

I think that

A=0

B=0

C=0

D=0

Hope this helped.

8 0
2 years ago
Read 2 more answers
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