3 years ago

Please give me the correct answer

Mathematics

2 answers:

Marat540 [252]3 years ago

5 0

Last one :) djsjsjdndnwjdjnd

Naily [24]3 years ago

3 0

The Awnser is the last one

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Solve the following system of equations using the elimination method.

Margaret [11]

So for eliminating, you only solve for one variable first.

I solved for y, so I multiplied by -4 to eliminate the x.

Then I got y= -1

I then substituted that to one of the equations to get x.

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3 years ago

HELP I WILL GIVE BRAINLIEST!!

Reika [66]

Answer:

x=40

Step-by-step explanation:

2x+7+x-10+63=180

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3 years ago

Convert the measurements 66,597 grams = how many kgs

Nuetrik [128]

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divide by 1000

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What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the

marishachu [46]

The sum of all the measurements is just the average times the number.

$\bar x = \frac{1}{n} \sum_{i=1}^n x_i$

$\sum_{i=1}^n x_i = n \bar x$

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The average of the last two is 7.2 so their sum is $2 \times 7.2$

That means the sum of the first 90 is $92 \times 7 - 2 \times 7.2$

so the average of the first 90 is

$\dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556$ cm

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notka56 [123]

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3 years ago

Please give me the correct answer ​

Please give me the correct answer