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3 years ago

Can sombody please explain and help me with this question pleaseeeeeeee (brainiest )

Mathematics

1 answer:

drek231 [11]3 years ago

4 0

Answer: B

Step-by-step explanation:

The volume of the the square pyramid (480in^3) would not be the same as the cylinder(452.12in^3) (just in case u need the formula Square pyramid - v=(1/3)*(12in)^2*(10in) = 430in^3 ) ( cylinder - v=(3.14)*(6.77in)^2*(10in) = 452.12in^3

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9 more than 2 multiplied by f

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(2+9)*f
= 11*f

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3 years ago

How can 15/6 mixed number in simplest form

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3 years ago

Find an equation of the line perpendicular to the graph of 14x-7y=8 that passing through the point at (-2,5).

MAXImum [283]

Answer:

2x + 4y = 16.

Step-by-step explanation:

14x - 7y = 8

Convert to slope-intercept form:

-7y = -14x + 8

y = 2x - 8/7

The slope is 2 so the line perpendicular to it has a slope of -1/2, so we have:

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3 years ago

Question: which of the following is equal to -7?

evablogger [386]

Answer:

-2-5

Step-by-step explanation:

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3 years ago

Read 2 more answers

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,

i.e. x = -8.4 and x= 1.4

Since, the value of x cannot be negative.

Thus, x = 1.4 feet.

4 0

3 years ago