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3 years ago

Will mark brainliest. 20 points.

Mathematics

1 answer:

Genrish500 [490]3 years ago

8 0

Answer:

I dont know sorry look so complicated

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PLEASE I NEED HELP QUICKLY!!! Find the solution for the given system of equations in the form (x,y).

goblinko [34]

Answer:

(4, - 4)

Step-by-step explanation:

<u>Given system:</u>

-x + y = 8
7x + 3y = - 16

<u>Multiply the first equation by 7 and add up the equations:</u>

-7x + 7y + 7x + 3y = 7*8 - 16
10y = 40
y = 4

-x + 4 = 8
-x = 4
x = - 4

3 0

2 years ago

Read 2 more answers

A school has 510 male students and 850 female students. If a student from the school is selected at random, what is the probabil

Colt1911 [192]

Answer:

0.375

Step-by-step explanation:

510 male out of a total of 1360

510/1360 = 0.375

5 0

3 years ago

Which expressions are equivalent to 10a - 25 + 5b

sergey [27]

Answer:

Step-by-step explanation:

$10a-25+5b\\\\-2(-5a-25+5b)=(-2)(-5a)+(-2)(-25)+(-2)(5b)\\=10a+50-10b\qquad NOT\\\\(2a-5+b)(5)=(2a)(5)+(-5)(5)+(b)(5)=10a-25+5b\qquad YES\\\\10(a-2.5+0.5b)=(10)(a)+(10)(-2.5)+(10)(0.5b)\\=10a-25+5b\qquad YES\\\\(-2a+5-b)(-5)=(-2a)(-5)+(5)(-5)+(-b)(-5)\\=10a-25+5b\qquad YES\\\\-10(-a-2.5-0.5b)=(-10)(-a)+(-10)(-2.5)+(-10)(-0.5b)\\=10a+25+5b\qquad NOT$

5 0

3 years ago

Write an expression where you multiply a decimal number by 100. In a complete sentence, describe which direction and how many pl

Tatiana [17]

If you are multiplying by 100, the decimal will move 2 places to the right.

It moves to the right when multiplying because the number is getting greater, and there are 2 zeroes in 100 so it moves twice.

6 0

4 years ago

I need help pls !!!!!!

Rama09 [41]

(k-7) would be the equation

6 0

3 years ago