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Katena32 [7]
3 years ago
9

A square picture with a side length of 4 inches needs to be enlarged. The final area needs to be 81 square inches. Which equatio

n can be used to solve for x, the increase in side length of the square in inches? x2 + 4x – 81 = 0 x2 + 4x – 65 = 0 x2 + 8x – 65 = 0 x2 + 8x – 81 = 0
Mathematics
2 answers:
alexira [117]3 years ago
9 0

Answer:

C) x2 + 8x – 65 = 0

Step-by-step explanation:

just took it :)

maw [93]3 years ago
4 0

Answer:

use photo math

Step-by-step explanation

its an app you can get on phone

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-3/7 × - 1 2/3<br>what is the answer ​
NNADVOKAT [17]

Answer:

\boxed{\frac{5}{7} }

Step-by-step explanation:

-\frac{3}{7} \times (- 1 \frac{2}{3} )

= -\frac{3}{7} \times (- \frac{5}{3} )

= \frac{5}{7}

7 0
2 years ago
Read 2 more answers
In the right triangle shown, A= 30° and AB = 8.
zloy xaker [14]

Answer:

BC=4\ units

Step-by-step explanation:

The picture of the question in the attached figure

we know that

sin(30^o)=\frac{BC}{AB} ----> by SOH (opposite side divided by the hypotenuse)

we have

AB=8\ units\\\\sin(30^o)=\frac{1}{2}

solve for BC

BC=sin(30^o)(AB)

substitute the values

BC=(\frac{1}{2})(8)

BC=4\ units

4 0
2 years ago
SEE IMAGE PLEASE !!!
inysia [295]
Center of rhombus bisects 90°.

Sum of angles in triangle = 180°
x + x + 14 + 90 = 180
2x + 104 = 180
2 (x + 52) = 180
x = (180 ÷ 2) - 52
x = 90 - 52
x = 38°


4 0
1 year ago
Read 2 more answers
To create a giant gemstone, sara first made two identical square pyramids that each had a base area of 100 square inches. Then s
inysia [295]

Answer:

8 inches.

Step-by-step explanation:

From the statement we have that they first made two identical square pyramids, each with a base area of 100 square inches.

Ab = s ^ 2 = 100

Therefore each side would be:

s = (100) ^ (1/2)

s = 10

So, side of the square base = 10 inches

Then they tell us that they glued the bases of the pyramids together to form the precious stone. The surface area of the gemstone is 520 square inches, so for a single pyramid it would be:

Ap = 520/2 = 260

For an area of the square pyramid we have the following equation:

Ap = 2 * x * s + s ^ 2

Where x is the height of each triangular surface and s is the side of the square base

Replacing we have:

260 = 2 * x * 10 + 10 ^ 2

20 * x + 100 = 260

20 * x = 160

x = 160/20

x = 8

Therefore, the value of x is 8 inches.

5 0
3 years ago
Please help!!! I need anybody help who knows the answer.
Tpy6a [65]

Your answer should be C sorry if i'm wrong, hope it helps tho

4 0
2 years ago
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