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ioda
3 years ago
10

Pls help, (20 pts, will mark u the brainliest when your correct, PLS ANSWER ASAP)

Mathematics
2 answers:
tester [92]3 years ago
4 0

Answer:

-7

Step-by-step explanation:

7.

step-by-step explanation:

the coefficient multiplies the variable.

it is -7.

Eva8 [605]3 years ago
4 0

Answer:

.

Step-by-step explanation:

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The mean score of a placement exam for entrance into a math class is​ 80, with a standard deviation of 10. Use the empirical rul
Sedbober [7]

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47.5%

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3 years ago
Solve the simultaneous equation <br> 2x-5y=9<br> 3x+4y=2
Dmitriy789 [7]

Answer/Step-by-step explanation:

2x-5y=9

Add 5y  to both sides of the equation.

2x=9+5y

Divide each term by 2 and simplify.

Divide each term in 2x=9+5y by 2

\frac{2x}{2} =\frac{9}{2} +\frac{5y}{2}

Cancel the common factor of 2.

Divide x by 1.

x=\frac{9}{2} +\frac{5y}{2}

y=\frac{-9}{5} +\frac{2x}{5}

----------------------------------------------------------------------------------------------------------------

3x+4y=2

Add 4y to both sides of the equation

3x=2+4y

Divide each term by 3 and simplify.

Divide each term in 3x=2+4y by 3.

\frac{3x}{3} =\frac{2}{3} +\frac{4y}{3}

Cancel the common factor of 3.

Divide x by 1.

x=\frac{2}{3} +\frac{4y}{3}

y=\frac{-1}{2} +\frac{3x}{4}

5 0
2 years ago
PLS HELP ME ASAP!!!!
elena55 [62]

Answer:

2Pi/8

Step-by-step explanation:

6 0
3 years ago
Eight more than twice a number is less than twenty (what is the expression)
blsea [12.9K]

eight more than twice a number is less than twenty (what is the expression)

2x+8 <20

4 0
3 years ago
Can you please help me out on this one ​
vampirchik [111]

Answer:

9

Step-by-step explanation:

You need to divide 54 by 6

4 0
3 years ago
Read 2 more answers
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