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horsena [70]
3 years ago
9

Complete the steps for solving 7 = -2x2+10x

Mathematics
2 answers:
V125BC [204]3 years ago
4 0
Step 1: move all terms to one side

7 + 2x^2 - 10x = 0

Step 2: Use the quadratic formula

X = 10 + 2(square root of 11). 10-2 _/—-11
————————————. ——————
4. , 4

Step 3: Simplify solutions

X= 5 + (square root of 11) 5 - (square root 11)
——————————- , ————————
2. 2
larisa [96]3 years ago
3 0

Answer:

Factor -2 out of the variable

Add 24/4 inside the parentheses and subtract 25/2

on the left side of the equation

White the perfect square trinomial as a binomial squared

Divide both sides by -2

Use the square root property of equality

Add 5/2 to both sides

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Step-by-step explanation:

7 0
2 years ago
Gracie bought a cd for $810 that earns a 2.9 APR and is compounded quarterly. The CD matures in 5 years. How much will this CD b
enyata [817]

Answer:

The amount that this CD will be worth at maturity would be $935.90. The right answer is B.

Step-by-step explanation:

In order to calculate How much will this CD be worth at maturity we would have to use and calculate the formula of future value as follows:

Future Value=Present value×(1+i/n)∧nt

Future Value=$810×(1+2.9%/4)∧(4×5)

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The amount that this CD will be worth at maturity would be $935.90

8 0
3 years ago
#10: find angle x and y!<br> Im struggling so much with this question please help a gurl out!
hjlf

Answers:

x = 100

y = 25

==============================================================

Explanation:

Angle y and the 25 degree angle are corresponding angle. Because the lines are parallel, this means that y = 25

Check out the attached image. Using a red pen, I extended one of the lines to form a triangle. From the alternate interior angle theorem, we know that one of the angles of the triangle is 75 degrees (alternate interior angles are congruent). Again this stems from the fact that the lines are parallel.

I've also introduced the variable z to help find x. The angles x and z add up to 180 degrees since they form a straight line. So we need to find z before we can find x.

The triangle's angles 25, 75, z add up to 180. Let's solve for z

25+75+z = 180

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z = 180-100

z = 80

Use this to find x

x+z = 180

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x = 180-80

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4 0
3 years ago
The average price of a gallon of gas increased by 12% in 2010 and by 10% in 2011. By what percentage did the average price of a
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Answer:

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Step-by-step explanation:

finding the percentage price increase

we need to find the difference in percentage price between the 2 years

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Sergeu [11.5K]
D as you can see on the number line d is 1/3 of the way to -2
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3 years ago
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