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3 years ago

Find the value of the discriminant of each quadratic equation:-2x^2-x-1=0

Mathematics

1 answer:

Blizzard [7]3 years ago

4 0

$\Delta=b^2-4ac\\
\Delta=(-1)^2-4\cdot(-2)\cdot(-1)=1-8=-7$

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Solve if x is 3.<br> 91+x raise to power2

Triss [41]

X=3
91 + x^2
91 + 3^2
91 + 9
91 + 9 = 100

6 0

4 years ago

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(PLEASE HELP!!!)Where does the following graph have clusters of data? Select all that apply.

grigory [225]

Answer:

1-5

Step-by-step explanation:

It has clusters from 1 to 5 because that is where all the dots are that are not seperated.

8 0

3 years ago

Enlargement or reduction?

djyliett [7]

Answer:

Reduction

Step-by-step explanation:

so, the blue shape's letters are E, F, G, H and I.

the green shape's letters are E', F', G', H', and I'.

the letters with the ' are the ones that are after the origianal.

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3 years ago

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a cone has a volume of 1230.88 units cubed and a diameter of 14 units what is the height of the cone use 3.14 for pi

ANEK [815]

Answer:

h= 24

Step-by-step explanation:

$v = \pi {r}^{2} \frac{h}{3}$

$r = \frac{d}{2}$

$r = \frac{14}{2}$

r= 7

1230.88=3.14×7^2×h/3

1230.88= 153.86h/3

h=1230.88/153.86

h= 24

7 0

2 years ago

Find the missing side lengths. leave your answers as radicals in simplest form.

Murrr4er [49]

Answer:

x = 4 , y = 2

Step-by-step explanation:

Using the sine / tangent ratios in the right triangle and the exact values

sin60° = $\frac{\sqrt{3} }{2}$ and tan60° = $\sqrt{3}$ , then

sin60° = $\frac{opposite}{hypotenuse}$ = $\frac{2\sqrt{3} }{x}$ = $\frac{\sqrt{3} }{2}$ ( cross- multiply )

x $\sqrt{3}$ = 4 $\sqrt{3}$ ( divide both sides by $\sqrt{3}$ )

x = 4

and

tan60° = $\frac{opposite}{adjacent}$ = $\frac{2\sqrt{3} }{y}$ = $\sqrt{3}$ ( multiply both sides by y )

y $\sqrt{3}$ = 2 $\sqrt{3}$ ( divide both sides by $\sqrt{3}$ )

y = 2

6 0

3 years ago