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Monica [59]
3 years ago
13

What is y=2(x+3)^2 -4 in standard form

Mathematics
2 answers:
romanna [79]3 years ago
5 0

here hope this helps :)

AVprozaik [17]3 years ago
4 0

Answer:

y=2x^2+12x+14

Step-by-step explanation:

y=2(x+3)^2 -4

y=2(x^2+6x+9) -4

y=2x^2+12x+18-4

y=2x^2+12x+14

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The lengths of the sides of a triangle are consecutive integers, and the largest angle is twice the smallest angle. What is the
hjlf

Answer:cosA = \frac{a+2}{2a}

Step-by-step explanation:

Given that the lengths of the sides of a triangle are consecutive integers

Since side cannot be negative we can assume that the sides are

a, a+1 and a+2 where a>0

The largest angle is opposite side a+2 and smallest is angle opposite a

Using sine formula and the given information that the largest angle is twice the smallest angle

we get

\frac{a}{sin A} =\frac{a+2}{sin 2A}

Cross multiply to get

\frac{sin 2A}{sin A } =\frac{a+2}{a}

Since sin 2A = 2sin A cos A

we get

2cosA = \frac{a+2}{a} \\cosA = \frac{a+2}{2a}

8 0
3 years ago
Dawn bought a winter coat at 30% off the original price. The discount on the coat was $21. was the original price of the coat? S
daser333 [38]

Answer:

$70

Step-by-step explanation:

21/30 = 0.7

100x 0.7 = 70

8 0
3 years ago
Please help!! I can’t figure this out
Rudiy27
Each room has 2 walls that are 4x10 = 40 square feet and 2 walls that are 8x10 = 80 square feet. So 80+80+40+40 = 240 square feet of wall will be painted per room.

We use 2 coats of paint so in effect, we double the area. Imagine laying one thin wall on top of the other. The amount of paint area used per room doubles from 240 to 480

There are 4 of these rooms so 4*480 = 1920

The total area we need to paint is 1920 square feet

Divide this over 32 to get 1920/32 = 60

Final Answer: 60
5 0
3 years ago
12. Find the slope and y-intercept of the line. y= 1/5x-8
eduard

Hello and Good Morning/Afternoon:

<u>Let's take this problem step-by-step</u>:

<u>What does the problem want us to find:</u>

  • slope
  • y-intercept

<u>Let's gather the information</u>:

  ⇒ the information given: y = 1/5 x - 8

        ⇒ the line is in <u>slope-intercept form</u>

            ⇒ means:

                     ⇒ coefficient in front of 'x' is the slope

                     ⇒ constant is the y-intercept

  • slope is 1/5
  • y-intecept is -8

<u>Answer:</u>

  • <u>Slope is 1/5</u>
  • <u>y-intercept is -8</u>

<u></u>

Hope that helps!

#LearnwithBrainly

7 0
2 years ago
Help me solve for the right one ? <br> I need help
astra-53 [7]

Answer:

it should be B correct me if I'm rong

8 0
3 years ago
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