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Juliette [100K]
3 years ago
9

PLEASE HELP! WILL MARK BRAINLIEST!

Mathematics
2 answers:
Ivahew [28]3 years ago
7 0

Answer:

donkey y are

understand the answer

Serga [27]3 years ago
6 0

answer:

its answer 4. or D.

x = 5.33

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An arch is in the shape of a parabola. It has a span of 100 feet and a maximum height of 25 ft.
faltersainse [42]

Answer:

y=-\frac{1}{100}(x-50)^2+25

the height of the arch 10 feet from the center is 24 feet

Step-by-step explanation:

An arch is in the shape of a parabola. It has a span of 100 feet, the vertex lies at the center 50 and the maximum height of 25 ft.

Vertex at (50,25)

vertex form of the equation is

y=a(x-h)^2+k, (h,k) is the center

y=a(x-50)^2+25

the parabola starts at (0,0) that is (x,y)

0=a(0-50)^2+25

subtract 25 from both sides

-25=a(-50)^2

-25=a(2500)

divide both sides by 2500

a=-\frac{1}{100}

y=-\frac{1}{100}(x-50)^2+25

the height of the arch 10 feet from the center.

center is at 50, 10 feet from the center so x=40 and x=60

y=-\frac{1}{100}(40-50)^2+25

y=24

the height of the arch 10 feet from the center is 24 feet

4 0
3 years ago
I need the x intercepts for (x+3)(x + 7) = 0
Scrat [10]

Answer:

-3, -7

Step-by-step explanation:

either x + 3 = 0 --> x = -3

or x + 7 = 0 --> x = -7

3 0
3 years ago
Read 2 more answers
Enter three different expressions that are equivalent to, but not exactly the same as 1/4 + 5/4​
choli [55]

Answer:

6/4 = 1 1/2  

1 2/4

12/8

Step-by-step explanation:

7 0
3 years ago
-12 + 6x = 6 + 5(x - 2) <br><br> Please help and EXPLAIN
icang [17]

Answer: x=8

Step-by-step explanation:

Distribute 5(x) and 5(-2)

-12 + 6x = 6 + 5x + (-10) OR 5x - 10

Flip if you'd like

6x - 12 = 6 + 5x - 10

Combine like terms

6x−12=(5x)+(6+−10)

6x - 12 = 5x - 4

Subtract 5x from both 6 and 5

6x - 5x = 5x - 5x

5x cancels out, so you're left with x, 12, and -4

x - 12 = -4

Add 12 to 12 and -4

12 + 12 = -4 + 12

12 cancels out

-4 + 12 = 8

x = 8

7 0
1 year ago
I need to find Angle B, but I cant figure it out! Please help.
Alborosie

An outside angle equals the sum of the two opposite inside angles.

So you have:

(5x-35) = 2x +58

Solve for X then you can calculate Angle B:

(5x-35) = 2x +58

Subtract 2x from both sides:

3x -35 = 58

Add 35 to both sides:

3x = 93

Divide both sides by 3:

X = 93 /3

x = 31

Now for Angle B, replace x with 31:

Angle B = 2x = 2(31) = 62 degrees.

8 0
3 years ago
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