3 years ago

Four times a number

Mathematics

2 answers:

BlackZzzverrR [31]3 years ago

6 0

Four times a number would equal 4n

Tatiana [17]3 years ago

6 0

The exact answer is 4n!

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You need 300 mL of a 65% alcohol solution. On hand, you have a 50% alcohol mixture. How much of the 50% alcohol mixture and pure

artcher [175]

Answer:

You will need 220 mL of the 60% solution and 80 mL of pure alcohol.

Step-by-step explanation:

Let 'x' be the amount of 50% alcohol solution and y the amount of pure alcohol.

Therefore:

(0.5x + y)/300 = 0.65 ⇒ 0.5x + y = 190

x + y = 300

Solving the sistem of equations:

x = 220 and y = 080

Therefore, You will need

220 mL of the 60% solution

and 80 mL of pure alcohol.

8 0

2 years ago

Use the Distributive Property to evaluate the expression.

beks73 [17]

Hello there! :)

The Distributive property states:

a(b+c)=ab+ac

So, we know what a is. It's 5.

b=3

c=0.4

5(3+0.4)

5*3+5*0.4

15+0.2

15.2

Hope it helps!

$GraceRosalia$

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2 years ago

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because it can go overseas

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3 years ago

HELP!!!!! Help plz thx

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150 is the answer I don’t think it is right

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3 years ago