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4 years ago

A rectangle has a length of 8ft

Mathematics

1 answer:

Rainbow [258]4 years ago

6 0

Answer:

48 sq ft

Step-by-step

I am pretty sure they mean what is the new area if the current area is expanded so: 100% + 50% = 150%

4 times 8 = current area = 32 sq ft

32 times 1.5 = new area = 48 sq ft

in the circumstance in which they were talking about the side lengths and not the original then it would be

8 times 1.5 = 12

4 times 1.5 = 6

6 times 12 = area = 72 sq ft

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How do I solve for x plzzzz help

jeka94

Answer:

x = -13

Step-by-step explanation:

Find LCM for 5 , 10. LCM of 5 , 10= 10

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Cross multiply,

x - 7 = -2 * 10

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7 0

3 years ago

Which value of -7(x2-6)+2y when x=2 and y=6

Marianna [84]

Answer:

Solution

= -7 (x2 -6) +2y

= -7 ( 2*2 - 6 ) + 2 * 6

= -7 ( 4 - 6) + 12

= -7 - 2 + 12

= - 9 + 12

= 3

I hope this help u :)

5 0

3 years ago

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Bess [88]

I think c it also could be b

4 0

4 years ago

Factorise 9 X square + Y square + Z square - 6 X Y + 2 Y Z - 6 x z hence find its value when X is equals to 1 by equal to 2 and

Assoli18 [71]

a) Factor 9x² + y² + z² - 6xy + 2yz - 6xz

This looks a lot like

(x+y+z)² = x² + y² + z²+ 2xy + 2yz + 2xz

except instead of x there's (-3x). So this must be

(-3x+y+z)² = (-3x)² + y² + z² + 2((-3x)y + (-3x)z + yz)

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Looks good.

Answer: (-3x+y+z)²

Since it's a square we could also negate the inside and write this (3x-y-z)²

b) I'll guess that says we want to evaluate this when x=1, y=2, z= -1

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Answer: 4

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4 years ago

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pochemuha

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8 0

4 years ago