3 years ago

Help please I don't understand this question

Mathematics

1 answer:

andrey2020 [161]3 years ago

6 0

Gbh ecd hgb gbh hope this helps

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I WILL GIVE 30 POINTS TO THOSE WHO FILL IN THE BLANK CORRECTLY

matrenka [14]

Answer:

x=7

Step-by-step explanation:

by pythagoras, 25^2=24^2+x^2

solve for x

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2 years ago

The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +

lianna [129]

You have a system of equations $\left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right.$ .

1. Substitude right side of second equation into the left side of the first equation: $-6x+6=-x^2+2x-9$ .

2. Solve this equation:
$x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4, \\ \sqrt{D}=2, \\ x_{1,2}=\dfrac{8\pm 2}{2 } =3,5$ .

3. Find y:
for $x_1=3, y_1=-6\cdot 3+6=-18+6=-12$ ,
for $x_2=5, y_2=-6\cdot 5+6=-30+6=-24$ .

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.

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3 years ago

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A 70" TV is advertised on sale at a local store. What are the length and width of the television?

a_sh-v [17]

The length and width of the television could be any two numbers whose product is 70.

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3 years ago

Calculate the surface area of a cylinder at waste bucket without a lid that measures 28 cm height and 18 cm in diameter give you

Debora [2.8K]

28500.53 Square Inches into Square Centimeters:

183,874.019348