3 years ago

What is the value of b?

Mathematics

1 answer:

VikaD [51]3 years ago

5 0

Answer: The b-value is the middle number, the number next to the X

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This year Reuben watched 80 movies. He thought that 68 of them were very good. Of the movies he watched, what percentage did he

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What is the volume of the prism? ________ cm3

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2x2 – 9x + 2 = –1

Reika [66]

Answer:

C) The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

Discriminant

$b^2-4ac\quad\textsf{when}\:ax^2+bx+c=0$

$\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real roots}$

$\textsf{when }\:b^2-4ac=0 \implies \textsf{one real root}$

$\textsf{when }\:b^2-4ac < 0 \implies \textsf{no real roots}$

$2x^2-9x+2=-1$

$\implies 2x^2-9x+3=0$

$\implies a=2, b=-9, c=3$

$\begin{aligned}b^2-4ac &=(-9)^2-4(2)(3)\\& =81-24\\&=57 > 0\implies \textsf{two real roots}\end{aligned}$

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2 years ago

21 and 22 are complementary angles. The measure of Z1 is 60°.

levacccp [35]

Answer:

Step-by-step explanation:

We assume you mean that ...

∠1 + ∠2 = 90°

60° + 2x° = 90° . . . . given values for the angles

2x° = 30° . . . . . . . . . .subtract 60°

x = 15

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3 years ago

Please help with all part because I will brainliest plus 50 points!!

KonstantinChe [14]

Answer:

sorry I can only answer b.

3 sec = 36 feet

6 sec = 72 feet

9 sec = 108 feet

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