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4 years ago

Does anyone know this?

Mathematics

2 answers:

barxatty [35]4 years ago

8 0

Answer:

$\Huge \boxed{-2}$

Step-by-step explanation:

$f(x)=-2x^2-2x+10$

For f(2), the input of the function is 2.

Let x = 2.

$f(2)=-2(2)^2-2(2)+10$

Evaluate.

$f(2)=-2(4)-2(2)+10$

$f(2)=-8-4+10$

$f(2)=-2$

lora16 [44]4 years ago

5 0

Answer:

$f(x) = - 2 {x}^{2} - 2x + 10$

put the value of x = 2

$f(2) = - 2( {2}^{2} ) - 2(2) + 10$

$f(2) = - 8 - 4 + 10$

$f(2) = - 12 + 10$

$f(2) = - 2$

hope it helps u

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What is the discriminate of the following quadratic equation? 4x^2 - 2x + 6 = 0

hram777 [196]

-92

Step-by-step explanation:

If a quadratic equation has the following form:

$ax^2 + bx + c =0, \;\;\;a \neq 0$

then its discriminant D is defined as

$D = b^2 - 4ac$

In our given quadratic equation, a = 4, b = -2 and c = 6, so its discriminant is

$D = (-2)^2 - 4(4)(6) = -92$

Note: The value of the discriminant D will determine the characteristics of the roots of the quadratic equation according to the following rules:

$D > 0,\;\;$ there will be 2 real roots

$D = 0,\;\;$ there will be 1 real root

$D < 0,\;\;$ there will be 2 imaginary roots

Hence our given quadratic equation will not have any real roots but only imaginary ones.

7 0

2 years ago

brett shaded 4/8 of a sheet of notebook paper. aisha says he shaded 1/2 of the paper. are the two fractions. equivalent? if so,

defon

Yes they are equivalent. Another fraction would be 2/4

6 0

3 years ago

Read 2 more answers

Answer the following equations:

Andrew [12]

Step-by-step explanation:

3(t+5) = 9

3t+15 = 9

3t = -6

t = -2

2(f-7) = -10

2f - 14 = -10

2f = 4

f = 2

-(c - 9) = 4

-c + 9 = 4

-c = -5

c = 5

-6(2t + 8) = -84

-12t - 48 = -84

-12t = -36

12t = 36

t = 3

-10 (s + 2) = -57

-10s - 20 = -57

-10s = -37

s = 3.7

7(3w + 8)/3 = -9

By cross multiplication,

7(3w + 8) = -27

21w + 56 = -27

21w = -83

w = -3.95

35/5 = (F - 32)/9

7 = (F - 32)/9

By cross multiplication,

63 = F - 32

63 + 32 = F

95 = F

Hope it helps.

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2 years ago

The mean annual incomes of certified welders are normally distributed with the mean of $50,000 and a population standard deviati

garik1379 [7]

Answer:

Their welders earn $50,000 annually.

Step-by-step explanation:

Given : $\mu = 50,000$

$\sigma = 2000$

n = 100

$\bar{x}=50350$

To Find : The ship building association wishes to find out whether their welders earn more or less than $50,000 annually.

Solution :

$H_0:\mu = 50000\\H_a: \mu \neq 50000$

n = 100

Since n > 30

So we will use z test

$z= \frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

Substitute the values

$z= \frac{50350-50000}{\frac{2000}{\sqrt{100}}}$

$z=1.75$

Refer the z table for p value

p value = 0.9599

α= 0.05

Since p value > α

So we accept the null hypothesis .

Hence their welders earn $50,000 annually.

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3 years ago

A 3 gallon jug of water cost $11.04. what’s the price per cup?

fiasKO [112]

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