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4 years ago

EASY PROBLEM!! ASAP I NEED HELP! WILL MARK BRAINLIEST!!What is 3 increased by 250%? Decreased by 100%? Decreased by 150%?

Mathematics

1 answer:

MrRissso [65]4 years ago

3 0

Answer:

formula =

NV=F% × O.V

x=350/100 × 3 increase=% + 100

x=3.5 × 3

x=10.5 a part decrease= % - 100

Step-by-step explanation:

do the steps similarly with the other parts.

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4 years ago

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Lindsie is painting on a canvas with dimensions of 3 ft by 4 ft. She wants to make a display model for a gallery that has twice

love history [14]

Answer:

B. 1.4 feet

Step-by-step explanation:

Let, the amount of increase be 'x' ft.

Since, the length and width of the canvas are 4 ft and 3 ft respectively.

Thus, area of the canvas, $A_{c}$ = length × breadth = 4 × 3 = 12 ft²

Since, the area of display model is twice the area of the canvas. We have,

$A_{d}$ = 2 × $A_{c}$

i.e. $A_{d}$ = 2 × 12

i.e. $A_{d}$ = 24 ft².

As, the length and width of the canvas are increased by 'x'.

The, length and width of the display model are (x+4) ft and (x+3) ft.

So, we get,

$A_{c}$ = length × breadth = (x+4) × (x+3) = $x^{2} +7x+12$

Since, $A_{d}$ = 24 ft²

i.e. $x^{2} +7x+12$ = 24

i.e. $x^{2} +7x-12=0$

Solving the quadratic equation, we get,

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Since, the value of x cannot be negative.

Thus, x = 1.4 feet.

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3 years ago