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3 years ago

Subtract:4x2 + 3x – 8 from 2x2 + 7x – 5

Mathematics

1 answer:

andriy [413]3 years ago

6 0

Answer:

10x-1

Step-by-step explanation:

(4×2)=8

8+3x-8

8-8+3x=3x

(2×2)=4

4+7x-5

4-5+7x=-1+7x

3x+7x-1

10x-1

good luck

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K(x) = 6x+100 k(-5) =

kkurt [141]

Answer:

$k(-5)=70$

Step-by-step explanation:

The given function is

$k(x)=6x+100$

To find k(-5), we put x=-5 into the given function to get;

$k(-5)=6(-5)+100$

Multiply out to obtain;

$k(-5)=-30+100$

This is the same as;

$k(-5)=100-30$

This simplifies to

$k(-5)=70$

3 0

4 years ago

Help me asap

Sladkaya [172]

Answer:

12x = 84

Step-by-step explanation:

$7 = \frac{84}{12}$

I am joyous to assist you anytime.

3 0

4 years ago

Solve 1 + cos theta = 2 cos^2 theta

valentina_108 [34]

$~~~~1+ \cos \theta = 2 \cos^2 \theta \\\\\implies 2\cos^2 \theta -\cos \theta -1 = 0\\\\\implies 2 \cos^2 \theta -2\cos \theta + \cos \theta -1 = 0\\\\\implies 2 \cos \theta( \cos \theta -1) +(\cos \theta -1)=0\\\\\implies (\cos \theta -1)(2 \cos \theta +1)=0\\\\\implies \cos \theta = 1, ~~\cos \theta = -\dfrac 12\\\\\implies \theta = 2n\pi,~~~ \theta = 2n\pi \pm \dfrac{2\pi}3$

8 0

2 years ago

I need to know what is the m< DBC?

Artist 52 [7]

Answer:

120

Step-by-step explanation:

The sum of the angles is 180 since it forms a straight line

2x+ x+90 = 180

Combine like terms

3x +90=180

Subtract 90 from each side

3x+90-90=180-90

3x= 90

Divide each side by 3

3x/3 = 90/3

x = 30

We want angle DBC = x+90

= 30+90

=120

5 0

3 years ago

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ANSWER NOW PLEASE MY LOVE I AM ABOUT TO DIE I NEED THIS ANSWER.....

vladimir1956 [14]

Answer:the answer is startfraction 1 over 36 end fraction

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Subtract:4x2 + 3x – 8 from 2x2 + 7x – 5​

Subtract:4x2 + 3x – 8 from 2x2 + 7x – 5