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inessss [21]
3 years ago
10

Select the correct answer.

Mathematics
2 answers:
alexgriva [62]3 years ago
3 0

Answer:

D. 157

Step-by-step explanation:

4(x^2+3)-2y

4(6^2+3)-2(-1/2) add in given values

4(39)+1.     start with parentheses

156+1.        combine like terms

157.            answer

anygoal [31]3 years ago
3 0

Answer:

D. 157

Step-by-step explanation:

Hi there!

We want to find the value of the expression 4(x²+3)-2y is when x=-6 and y=-1/2

Let's first simplify the expression, as that will likely make it easier

Distribute 4 to both x² and 3

4x²+12-2y

That's the expression

Substitute -6 as x into the expression

4(-6)²+12-2y

Raise (-6) to the second power

4*36+12-2y

Multiply 36 by 4

144+12-2y

Add 12 and 144 together

156-2y

Now the expression is 156-2y

But remember that we know that y=-1/2, and we haven't substituted it into the expression yet

Substitute -1/2  as y into the expression

156-2(-1/2)

Multiply

156+2/2

Simplify

156+1

Add

157

Hope this helps!

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lara [203]

Answer:

1. 12/13 and 5/13

2. 5/13 and 12/13

3. The sin of <A and cos of <B are congruent.

Since "Sine" is Opposite/Hypotenuse and Cosine is adjacent hypotenuse...

The opposite of angle A is 12, and the hypotenuse is 12, therefore making 12/13.

The adjacent of angle B is 12, (The adjacent side is the side next to the opposite that is not the hypotenuse) and the hypotenuse is 13, therefore making 12/13.   (The hypotenuse never changes no matter how you look at the triangle.)

Sin <A = 12/13

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7 0
3 years ago
How many minutes is it from 8:00am to 11:40am?
ollegr [7]

Answer:

220 minutes

Step-by-step explanation:

Find how many hours there are between the two times which is 3 hours then multiply 3 by 60 because there are 60 minutes in an hour

Since the time is 11:40 we also know 40 minutes have passed so add the two minutes

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5 0
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Fudgin [204]

Answer:

the second choice

Step-by-step explanation:

8 0
3 years ago
A home with an area of 2,200 square feet has 660 square feet of wood flooring. What percent of the home's flooring is wood
zheka24 [161]

Answer:

30%

Step-by-step explanation:

Given data

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Area of wood flooring=  660 square feet

The percent of wood flooring in the house can be gotten as

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7 0
3 years ago
John and Karen plan on building a garden in their new home. They plan on designing a rectangular garden with a perimeter of 70 f
valentinak56 [21]

Answer:

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Step-by-step explanation:

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70 = 10L ... dividing both sides by 10 gives

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Recall from the first equation that W = 4L

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7 0
3 years ago
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