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3 years ago

What is the area of a triangle that has a base of 5 feet and a height of 12 feet

1 answer:

riadik2000 [5.3K]3 years ago

6 0

Hey there!

When we do the area of a triangle, we use the formula:

A = bh/2

With b as the base and h as the hight.

We'll get to why this formula works in a minute. If we plug in our given values into this formula, we get:

A = (5)(12)/2
A = 60/2
A = 30 feet squared

The reason why this formula works is simple. When you think of a triangle, do you ever think of it as half a rectangle? When we do the area of a rectangle, we sort of do base times height- we just do length times width. We find the area of the triangle as if it's a rectangle, and just divide it by 2 because it's half of a rectangle.

Hope this helps!

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adell [148]

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You are knitting a blanket. You want the area of the blanket to be 24 feet squared . You want the length of the blanket to be 2

Sauron [17]

Think of it this way: x multiplied by a number that is two more than x is y.
So, look at the factors. 3 and 8 wouldn't work, because 8 is 5 longer than 3. 1 and 24 wouldn't work, because 24 is 23 more than 1. 12 and 2 is also not going to work; 12 is 10 more than 2. What you have left is 4 and 6. 6 is 2 more than 4, and they both multiply to get 24.

So, the correct answer is 6 feet long and 4 feet wide.

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3 years ago

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-4xy(4x2 + 7y - 8xy)

EastWind [94]

$- 4xy( {4x}^{2} + 7y - 8xy)$

$- 4xy( {4x}^{2} )- 4xy(7y)- 4xy( - 8xy)$

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3 years ago

If f(x) = 3x - 12, what is f(2)?

LUCKY_DIMON [66]

Answer is D
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3 years ago

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Britney is solving a quadratic equation. Her first

Liula [17]

Britney used commutative property of addition and distributive property of multiplication over addition to get to step

The answer is II and IV ⇒ answer 4

Step-by-step explanation:

The quadratic equation is:

3x² - 8 - 10x = 3(2x + 3)

Britney's step is:

3x² - 10 x - 8 = 6x + 9

Lets explain the meaning of:

1. Commutative property of addition is: you can add a and b or b and a

both give the same answer

2. Distributive property of multiplication over addition is: when the

number a is multiplied by the sum of two numbers (b + c), the

first number a can be distributed to both b and c and multiplied

by each of them separately, then adding the two products ab and

ac together for the same result as multiplying the first number a by

the sum (b + c) ⇒ a(b + c) = ab + ac

3. Addition property of equality is: the property that states if you

add the same number to both sides of an equation, the sides

remain equal

4. Multiplication property of equality is: The property that states if

you multiply both sides of an equation by the same number, the

sides remain equal

Now let us explain Britney's step

∵ She change the places of the terms - 10x and - 8

- She arranges the terms of the left hand side from greatest power

of x to the numerical term

∴ She used the commutative property of addition

∵ She multiplied 3 by 2x and multiplied 3 by 3

- She multiplied the number out side the bracket by each of the

two terms in the bracket

∴ She used the distributive property of multiplication over addition

Britney used commutative property of addition and distributive property of multiplication over addition to get to step

The answer is number 4) II and IV

Learn more:

You can learn more about quadratic equation in brainly.com/question/8196933

#Learn withBrainly

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3 years ago

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