3 years ago

What is the answer to this question?

Mathematics

1 answer:

Andrew [12]3 years ago

3 0

first -10 then divide by 10

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Consider the system of linear equations. x + y = 9.0 0.50 x + 0.20 y = 4.05 Find the values of x and y .

mixas84 [53]

Answer:

x=7.5

y=1.5

Step-by-step explanation:

$x + y = 9.0$

subtract x from both sides

$y=9-x$

$0.50x + 0.20y= 4.05$

$0.50 x +0.20(9-x)= 4.05$

$0.50x+1.8-0.2x= 4.05$

combine like terms

$0.30x+1.8= 4.05$

subtract 1.8 from both sides

$0.30x=2.25$

divide both sides by 0.3

x=7.5

$y=9-x$

$y=9-7.5$

y=1.5

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3 years ago

The teacher is saying the answer is 7/15. how did she get that?

balu736 [363]

I think this is how
you change the - to a +
8/12 + -1/5 then
2/3+-1/5 then
10/15+-3/15

10+-3
---------
15

7/15

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3 years ago

I need help on this too please I'm literally struggling

Orlov [11]

The probability is 0.2256 or 22.56% chance i think

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3 years ago

Which of the following graphs would not represent the relative frequencies of heads when tossing 1 penny?

tiny-mole [99]

Answer:

the chance of getting heads when flipping a coin is 50%. As I cannot see the graphs, choose the one that shows 50%.

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3 years ago

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30% of the sixth grade is eleven years old. if there are 90 eleven years olds, how many total students are in the sixth grade?

Darina [25.2K]

The answer is 300 students.
.3x = 90
90 / .3 = 300

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4 years ago

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