2 years ago

So what's the use Mental Math to find 7 x 53 which expression could is definitely not the

Mathematics

2 answers:

Bess [88]2 years ago

8 0

Im not sure what you mean but the answer would be 371

docker41 [41]2 years ago

5 0

7x50+ 7x3 would be easy mental math.

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A parking space shaped like a parallelogram has a base of 17 feet and a height is 9 feet. A car parked in the space is 16 feet l

Sauron [17]

17 by 9 parking space
16 by 6 car

17-16=1
9-6=3
1 foot by 3 feet left of parking space

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3 years ago

Evaluate -3(9+y) if y = -7

mario62 [17]

Answer:

-6

Step-by-step explanation:

Substitutet -7 for y in -3(9+y): -3(9 - 7) = -3(2) = -6

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3 years ago

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pentagon [3]

Answer:

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Step-by-step explanation:

I just guessed this on E. and got it right.

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3 years ago

3n + 7 - 11n - 31 = 160

Otrada [13]

Answer:

n = -23

Step-by-step explanation:

3n + 7 - 11n - 31 = 160

Step 1: Combine like terms

-8n - 24 = 160

Step 2: Simplify

-8n = 184

n = -23

6 0

2 years ago

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Help me as quick as possible <br> 11x+4y=12<br> 9x-4y=8<br> Solve it with elimination method

Firdavs [7]

Answer:

x = 1, y = 1/4

Step-by-step explanation:

$11x + 4 y = 12 \ \ \ ---( 1)\\9x -4y = 8 \ \ \ - - - (2)\\\\(1) + ( 2 ) => 20x + 0 = 20\\\\$

$=> x = 1$

Substitute x = 1 in ( 1 ) :

$11 + 4y = 12\\4y = 12 - 11\\\\y =\frac{1}{4}$

3 0

3 years ago