3 years ago

NEED HELP ASAP!!!!!!!!!!!!!!!!

Mathematics

1 answer:

FromTheMoon [43]3 years ago

5 0

Answer:

6:8 and 9:12

Step-by-step explanation:

As long as you do the same thing to both parts of the ratio, it's the same ratio

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whats the answer of the problem peter is 3 years older than his sister Anna. if times their combined age is 85 . determine Annas

jeyben [28]

Answer:

Anna is 41 years old.

Step-by-step explanation:

Easiest way to do this is by building a equation,

Lest say Anna's age is $x$ .

Then as Peter is 3 years older than Anna Peter's age should be $x+3$ .

Then the combined ages of the two people is given as 85. So we can write an equation as,

$x+(x+3)=85$

$x+x+3=85$

$2x+3=85$

$2x+3-3=85-3$ (deducting 3 from both sides of the equation)

$2x=82$

$x=41$

As we originally took Anna;s age as $x$

We can say Anna is 41 years old.

4 0

3 years ago

Look at the attachment! This is algebra. 10 points!

boyakko [2]

If x∆y = 3x - y², then

5∆1 = 3×5 - 1² = 15 - 1 = 14

and

14∆6 = 3×14 - 6² = 42 - 36 = 6

So (5∆1)∆6 = 6.

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2 years ago

11n plus 5 plus3 plus1

Nikitich [7]

Answer:

Step-by-step explanation:

11 + 5 = 16

16 + 3 = 19

19 + 1 = 20

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3 years ago

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nikklg [1K]

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-7 2/3+(-5 1/2)+ 8 3/4

Alex_Xolod [135]

Step-by-step explanation:

-7 2/3+(-5 1/2)+ 8 3/4

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