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3 years ago

Evaluatethe expression 6x2-3x+1 for x=-2

Mathematics

1 answer:

Ad libitum [116K]3 years ago

4 0

Answer:

Step-by-step explanation:

6(-2)^2 - 3(-2) + 1

6(4) + 6 +1

24 + 6 + 1 = 31

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A square base of a pyramid has the dimensions 5 yards by 5 yards. The height of one of the triangular faces is 12 yards. How can

-Dominant- [34]

Answer:

145 yards squared

Step-by-step explanation:

So the area of the base is area of a square with side length of 5 yards $5*5=25$

The area of one triangular face base times height divided by two and then simply multiplied by 4 because there are 4 triangular faces.

$(\frac{5*12}{2} )*4 = 120$

So the total surface area is $25+120=145$ yards squared

4 0

3 years ago

Read 2 more answers

Select the correct answer from each drop-down menu.

vazorg [7]

Answer:

Step 1: Distribute $-2$ to $5x$ and $8$

Step 2: Subtract from both sides of the equation $6x$

Step 3: Add to both sides of the equation $16$

Step 4: Divide both sides of the equation by $-16$

Step-by-step explanation:

Step 1: Apply the Distributive Property. Then you must distribute $-2$ to $5x$ and $8$

Then:

$-2(5x+8)=14+6x\\\\-10x-16=14+6x$

Step 2: You must apply the Subtraction property of Equality and subtract $6x$ from both sides of the equation. Then:

$-10x-16-6x=14+6x-6x\\\\-16x-16=14$

Step 3: You must apply the Addition property of Equality and add $16$ to both sides of the equation. Then:

$-16x-16+16=14+16\\\\-16x=30$

Step 4: You must apply the Division property of Equality and divide both sides by $-16$ . Then:

$\frac{-16x}{-16}=\frac{30}{-16}\\\\x=\frac{30}{-16}\\\\x=-\frac{15}{8}$

6 0

3 years ago

Write an expression for 213 increased by d.

Tcecarenko [31]

Write an expression for 213 increased by d: $213+d=x$

6 0

3 years ago

FIND PRODUCT USING THIS AREA MODEL 300+70+8 AND WRITE THE EQUATION

Dmitrij [34]

Answer:

378

Step-by-step explanation:

300

+-------

378

8 0

3 years ago

Bob is trying to calculate the area of a triangle with a base of 5 meters and a height of 7 meters. He mistakenly switches the h

ehidna [41]

Answer:

see below

Step-by-step explanation:

A = 1/2 b*h

A = 1/2 (5*7)

We can use the commutative property of multiplication which states

a*b = b*a

A = 1/2 (7*5)

This will not affect the answer because 5*7 = 7*5

6 0

3 years ago