3 years ago

Please help with my homework please

Mathematics

1 answer:

marysya [2.9K]3 years ago

7 0

I is c I think sorry if it’s not

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Factor each completely

avanturin [10]

K^2-5k-50
(k-10)(k+5)

This is because k*k=k^2 (your first term), 5k-10k=-5k (your second term) and -10*5=-50 (your last term).

Distribute to check.

3 0

3 years ago

Which equation represents the circle described? (in picture)

Sedaia [141]

You are right. In circle equation we have =r² so the correct answer will be C od D. But we have to calculate the center of a circle.

$x^2+y^2-8x-6y+24=0\quad|-24\\\\(x^2-8x)+(y^2-6y)=-24$

Complete the square:

$x^2-8x+a^2\implies a=\dfrac{8x}{2x}=4\implies x^2-8x+4^2\\\\\\y^2-6y+b^2\implies b=\dfrac{6y}{2y}=3\implies y^2-6y+3^2$

And we have:

$(x^2-8x)+(y^2-6y)=-24\\\\(x^2-8x+4^2)-4^2+(y^2-6y+3^2)-3^2=-24\\\\
(x-4)^2+(y-3)^2-16-9=-24\\\\(x-4)^2+(y-3)^2-25=-24\quad|+25\\\\\boxed{(x-4)^2+(y-3)^2=1}$

So the answer is C (the same left side of equation).

6 0

3 years ago

Rachel is 40 cm taller than Lucy. Rachel is 25 percent taller than Lucy. How tall is Lucy? Explain

tatyana61 [14]

What is 40cm 25% of?
The answer is 160cm.

Rachel is 160cm. 160 - 40 = 120.

Lucy is 120cm tall.

5 0

3 years ago

A sports club offers an organized basketball league. A team pays $600 to join their league. In addition to paying their share of

egoroff_w [7]

Answer:

Step-by-step explanation:

600-775=125

25x5=125

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3 years ago

Read 2 more answers

The ratio of Dobermans to terriers is 2:7. There are 774 dogs altogether.

kaheart [24]

Answer:

172-602 I think

Step-by-step explanation:

6 0

3 years ago