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2 years ago

PLEASE HELP!!!!!!!!! Solve the system using elimination method.

Mathematics

1 answer:

NeX [460]2 years ago

8 0

Answer:

The answer is (6,12)

107x= 642

x=6

7•6 +2y=66

y= 12

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Multiplying Binomials<br> pls help

allsm [11]

Answer:

Answer C

Step-by-step explanation:

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3 years ago

Alex scored 98,72, and 87 on his first three math test. What must he score on the next test to have an average of at least 86 (P

ss7ja [257]

Answer:

$\huge\boxed{\text{At least an } 87\%}$

Step-by-step explanation:

In order to find what score Alex must earn to have an average of 86 on all his tests, we need to first note what the formula to find the average of a data set is.

$\displaystyle \frac{x_1+x_2+...x_n}{n}$

What the formula means is that we have to add up all the values then divide by the total number of values.

Let's represent our unknown number as $x$ .

$\displaystyle \frac{98+72+87+x}{4} \geq 86$ (since we want AT LEAST an 86).

Let's solve this inequality for x.

$\frac{98+72+87+x}{4} \cdot 4 \geq 86 \cdot 4$
$98+72+87+x \geq 344$
$257 + x \geq 344$
$257 + x - 257 \geq 344 - 257$
$x \geq 87$

So, Alex must score at least an 87% on his next quiz to have an average of 86%.

Hope this helped!

8 0

2 years ago

What is 10 times 10 times 10 times 10 times 10 in exponent form and word form what is the answer

jolli1 [7]

$10^{5}$ in exponent form and in word form it is 10 to the 5th power

5 0

3 years ago

Read 2 more answers

How do you calculate the common difference?

SCORPION-xisa [38]

Answer:

<h3> second term minus first term </h3>

Step-by-step explanation:

Difference is a result of subtracting (not dividing!)

To calculate difference between two terms we have to subtract the previous from the next:

$d=a_2-a_1=a_3-a_2=a_4-a_3=...=a_n-a_{n-1}$

7 0

3 years ago

Which equation represents a line that has a slope of 1/3 and passed through point (-2,1)?

umka2103 [35]

Answer:

y=1/3x+5/3

Step-by-step explanation:

use the equation y=mx+b plug in slope for m, -2 for x and 1 for y

7 0

3 years ago