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3 years ago

What is the substitution for 3x+4y^2 if x= -2 and y=3?

Mathematics

1 answer:

solniwko [45]3 years ago

5 0

Answer:

Step-by-step explanation:

$3x+4y^2\\\\\text{Substitute the value of x = -2 and y = 3 to the expression:}\\\\3(-2)+4(3^2)\qquad\text{use PEMDAS}\\\\=-6+4(9)=-6+36=30$

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A tv costs £800 plus VAT at 20%.<br>What is the total cost of the TV?

Maru [420]

Answer:

Step-by-step explanation:

800+20%

20%= (20/100)

800/100=8*20=160

add to original price= 800+160=960

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2 years ago

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36 of 80 marbles are blue. What percent of the marbles are blue

Masja [62]

If 36 of 80 marbles are blue, then the percent of marbles that are blue is 44% i think

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Which inequality does this graph represent?

garri49 [273]

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3 years ago

How many sides does a polygon have if the sum of the measures of the interior angles is 3960

anastassius [24]

Answer: the polygon has 20 sides.

Step-by-step explanation:

The formula for determining the sum of the measure of the interior angles in a regular polygon is expressed as (n - 2) × 180.

if the sum of the measures of the interior angles is 3960

degrees. This means that

(n - 2) × 180 = 3960

Expanding the brackets by applying the distributive property, it becomes

180n - 360 = 3960

180n = 3960 - 360

180n = 3600

Dividing both sides by 180, it becomes

n = 3600/180

n = 20

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3 years ago

Line AB intersects line CD at point F, with a ray FE forming a right angle EFB. What angle relationship best describes angles AF

vova2212 [387]

Based on the positions of angles AFC and EFC, the relationship between them is a Complimentary angle.

<h3>How are AFC and EFC related?</h3>

Angles AFC and EFC are complimentary angles because complimentary angles are angles that add up to 90 degrees.

Looking at the shape, Line FC divides the right angle to create angles AFC and EFC so when these are added together, they equal 90 degrees.

In conclusion, angles AFC and EFC are complimentary.

Find out more on complimentary angles at brainly.com/question/20728641.

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1 year ago