3 years ago

What is 78+34 is the same as 80+

Mathematics

1 answer:

babunello [35]3 years ago

7 0

Answer:

Step-by-step explanation:

78+34=112

80+32=112

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What is the answer to -5x+7y=11<br> -5x+3y=19

marusya05 [52]

$\left\{\begin{array}{ccc}-5x+7y=11\\-5x+3y=19&/\cdot(-1)\end{array}\right\\+\left\{\begin{array}{ccc}-5x+7y=11\\5x-3y=-19\end{array}\right\\-------------\\.\ \ \ \ \ \ \ \ 4y=-8\ \ \ \ |divide\ both\ sides\ by\ 4\\.\ \ \ \ \ \ \ \ \ y=-2\\5x-3(-2)=-19\\5x+6=-19\\5x=-19-6\\5x=-25\ \ \ \ \ |divide\ both\ sides\ by\ 5\\x=-5\\\\Answer:x=-5\ and\ y=-2$

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3 years ago

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Pls help… grade 6/ primary 6 work. thanks!

Yuri [45]

Answer:

320

Step-by-step explanation:

go backwards, 75 + 45 = 120

120 * 5/3 = 200

200+40 = 240

240 *4/3 = 320

3 0

2 years ago

Please help I’ll mark you as brainliest if correct

Len [333]

Answer:

I think it is option B

Step-by-step explanation:

I dont know if I am right

if I am your welcome

4 0

3 years ago

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Write a system of equations to describe the situation below, solve using any method, and fill in the blanks.

olasank [31]

Answer:

x=18 y=69

Step-by-step explanation:

3x+5y=399

x+5y=363

2x=36

x=18

18+5y=363

5y=345

y=69

5 0

2 years ago

What is X? I literally forgot how to do this lol

sdas [7]

Step-by-step explanation:

A straight line has an angle of 180

132+(2x+3)=180

2x+3=48

2x=45

x=45/2

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3 years ago