All categories

3 years ago

Evaluate when x = 2 -X2 + 5x - 7

Mathematics

1 answer:

Rufina [12.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

f(x)=x²-5x+7

f(2)=2²-5.2+7=4-10+7=11-10=1

f(-1)=(-1)²-5.(-1)+7=1+5+7=13

f(1/3)=(1/3)²-5(1/3)+7=1/9-5/3+7=49/9

∴, f(2)-f(-1)+f(1/3)

=1-13+49/9

=58/9-13

=-59/9

mark be brainlest plss

You might be interested in

1.8.2

VLD [36.1K]

Answer:

4.66

-0.97

-3/2

-20

3 0

3 years ago

Rewrite the function by completing the square.

bixtya [17]

Answer:

$g(x) = 4(x - 2)^2 -9$

Step-by-step explanation:

Given

$g(x) = 4x^2 - 16x + 7$

Required

Complete the square

Rewrite so that $x^2$ has 1 coefficient

$g(x) = 4(x^2 - 4x) + 7$

Take half of the coefficient of x

$\frac{4}{2} = 2$

Square the result

$(\frac{4}{2})^2 = 2^2$

$(\frac{4}{2})^2 = 4$

Add and subtract the result in the bracket

$g(x) = 4(x^2 - 4x + 4 - 4) + 7$

Expand the bracket to remove -4

$g(x) = 4(x^2 - 4x + 4) - 16 + 7$

$g(x) = 4(x^2 - 4x + 4) -9$

Expand the bracket

$g(x) = 4(x^2 - 2x -2x+ 4) -9$

Factorize

$g(x) = 4(x(x - 2) -2(x-2)) -9$

Factor out x - 2

$g(x) = 4((x - 2)(x-2)) -9$

Express as square

$g(x) = 4(x - 2)^2 -9$

3 0

3 years ago

A football team gains 7 yards in the first down then gains 2 yards in the second down. Then loses 4 yards in the third yard. Wha

Alinara [238K]

Answer: 5

Step-by-step explanation:

First we should do the first step: 7+2=9, The they lose 4 which then 9-4

which would equal 5

6 0

3 years ago

Read 2 more answers

I need help with this please help me

lozanna [386]

8/9 - 1/3 =
8/9 - 3/9 = 5/9

8 0

3 years ago

Read 2 more answers

How to shade the pieces

gayaneshka [121]

Answer:I am pretty sure you shade the right side on all but the second one you shade the left side.

Step-by-step explanation:

5 0

4 years ago