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3 years ago

Which quadratic equation has roots of 7 and -2?

Mathematics

1 answer:

RUDIKE [14]3 years ago

7 0

Answer:

x² - 4x - 21 = 0

Step-by-step explanation:

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4 years ago

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lidiya [134]

Answer:

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Step-by-step explanation:

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3 years ago

Solve for b<br><br> B=??????

kozerog [31]

Answer:

$\frac{b-7}{b+1}=\frac{b-10}{b+4}$

$\left(b-7\right)\left(b+4\right)=\left(b+1\right)\left(b-10\right)$

$\left(b-7\right)\left(b+4\right)=b^2-3b-28$

$\left(b+1\right)\left(b-10\right)=b^2-9b-10$

$b^2-3b-28=b^2-9b-10$

$b^2-3b-28+28=b^2-9b-10+28$

$b^2-3b=b^2-9b+18$

$b^2-3b-\left(b^2-9b\right)=b^2-9b+18-\left(b^2-9b\right)$

$6b=18$

$\frac{6b}{6}=\frac{18}{6}$

$b=3$

4 0

2 years ago

What is the volume of this square based pyramid?

Butoxors [25]

Hey There! I can help you by explaining how to solve it but not answering sorry! Anyhow, To find the volume of a square based pyramid I suggest you start with the square and do L x W. Than Solve the triangles by using formula 0.5 * b * h. Hint: On the bottom triangle use 8cm from the square with the 3.8cm. Hope you now understand and can find the answer!

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3 years ago