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3 years ago

12

(Its multiple choice)

2 answers:

Ludmilka [50]3 years ago

7 0

Answer:20h + 21 is the only one equivalent to 4(5h + 4) + 5

Step-by-step explanation:

melisa1 [442]3 years ago

7 0

Answer:

20h+21 is the answers for the question

Step-by-step explanation:

please give me brainlest

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What method would be best to use 53=4(x-3)^2-11

Veronika [31]

Answer:

x = 7 , -1

Step-by-step explanation:

<u>SOLUTION :-</u>

$4(x-3)^2-11 = 53$

Add 11 to both the sides.

$=> 4(x-3)^2-11+11=53+11$

$=> 4(x-3)^2 = 64$

Divide both the sides by 4.

$=> \frac{4(x-3)^2}{4} = \frac{64}{4}$

$=> (x-3)^2 = 16$

Root square both the sides.

$=> \sqrt{(x-3)^2} = \sqrt{16}$

$=> x-3 = +4 \; or -4$

Here , x will have two values -

1) $x-3 = 4$

$=> x = 4 + 3 = 7$

2) $x - 3 = -4$

$=> x = -4 + 3 = -1$

<u>VERIFICATION :-</u>

When x = 7 ,

$4(x-3)^2 - 11 = 4(7 - 3)^2 - 11$

$= 4 \times 4^2 - 11$

$= 4 \times 16 - 11$

$= 64 - 11$

$= 53$

When x = -1 ,

$4(x-3)^2 - 11 = 4(-1 - 3)^2 - 11$

$= 4 \times (-4)^2 - 11$

$= 4 \times 16 - 11$

$= 64 - 11$

$= 53$

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3 years ago

If David has test average of 80, Homework average of 90, and the final exam score of 71,

kumpel [21]

B bc that math adds up right

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Write an equation that represents a discount of 18% on a retail price of $55. Let p represent the new price.

trapecia [35]

$\boxed{\tt{55(55-0.18)=pA}}$

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x = 2.1

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vlada-n [284]

Answer:

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