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andriy [413]
3 years ago
10

15 points and show steps

Mathematics
1 answer:
Westkost [7]3 years ago
3 0

Answer:

<h2>x = -7 and x = 7</h2>

Step-by-step explanation:

-2x^2-9=-107\qquad\text{add 9 to both sides}\\\\-2x^2-9+9=-107+9\\\\-2x^2=-98\qquad\text{divide both sides by (-2)}\\\\\dfrac{-2x^2}{-2}=\dfrac{-98}{-2}\\\\x^2=49\to x=\pm\sqrt{49}\\\\x=-7\ \vee\ x=7

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Wei has $150.00 to make a garland using 60-cent balloons. He wants to purchase 100 blue balloons and some number of white balloo
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Answer:

The answer is 0.60b + 0.30w = 150; 60 + 0.30w = 150

Step-by-step explanation:

Wei can purchase 300 balloons.

The model used for the problem is .

Step-by-step explanation:

Let the number of white balloons = x

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Answer:

Hello the required image is missing attached below is the missing box

answer : FHGE

Step-by-step explanation:

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What is a blind spot for a driver of a car
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adelina 88 [10]

Answer:

m∠1= 41°

m∠2= 85°

m∠3= 95°

m∠4= 85°

m∠5= 36°

m∠6= 49°

m∠7= 106°

Step-by-step explanation:

<u>To find m∠2</u>

95+m∠2= 180

-95             - 95

m∠2= 85

<u>To find m∠4</u>

Since they are vertical angles, m∠2=m∠4, that means that they are both 85°

<u>To find m∠1</u>

There is four angles in this shape, so the sum is 360 degrees.

90+144+85+m∠1= 360

319+m∠1= 360

-319            -319

m∠1= 41°

<u>To find m∠5</u>

144+m∠5= 180

-144             -144

m∠5= 36°

<u>To find m∠6</u>

m∠5+m∠3+m∠6= 180

36+95+m∠6= 180

131+m∠6= 180

-131             -131

m∠= 49°

<u>To find m∠7</u>

You need to find the sum of the other unidentified angle.

m∠6+m∠=180

49+m∠= 180

-49            -49

m∠= 131

Now you need to find the sum of all the angles in the quadrilateral to get the measure for angle 7.

131+38+85+m∠7= 360

254+m∠7= 360

-254            -254

m∠= 106°

4 0
4 years ago
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