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il63 [147K]
3 years ago
10

Evaluate the expression when x = -3x²+6x+8​

Mathematics
2 answers:
adell [148]3 years ago
3 0
6x-1_______________________
Sedaia [141]3 years ago
3 0

Answer:

-1

Step-by-step explanation:

x² + 6x + 8, x= -3

= (-3)² + 6(-3) + 8

= 9 + (-18) + 8

= 9 - 18 + 8

= - 1

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If the given values in a right triangle are cos A =
Vlad1618 [11]
See the picture attached to better understand the problem

we know that
in the right triangle ABC
cos A=AC/AB
cos A=1/3
so
1/3=AC/AB----->AB=3*AC-----> square----> AB²=9*AC²---->  equation 1

applying the Pythagoras Theorem
BC²+AC²=AB²-----> 2²+AC²=AB²---> 4+AC²=AB²----> equation 2

substitute equation 1 in equation 2
4+AC²=9*AC²----> 8*AC²=4----> AC²=1/2----> AC=√2/2
so
AB²=9*AC²----> AB²=9*(√2/2)²----> AB=(3√2)/2

the answer is
the hypotenuse is (3√2)/2

5 0
3 years ago
X-2/x+4=x-6/x-4 how to solve ? <br> a. x=8 <br> b. x=3<br> c. x=9 <br> d. x=5
lana66690 [7]

Answer:

the answer is a where x=8

Explanation:

cross multiplication method

8 0
3 years ago
How to solve for x/ extraneous solutions
taurus [48]

Answer:

<h2>x = 8</h2>

Step-by-step explanation:

\log_ab=c\iff a^c=b\\\\===================\\\\Domain:\ 8x>0\to x>0\\\\\log_4(8x)=3\iff4^3=8x\\\\8x=64\qquad\text{divide both sides by 8}\\\\x=8\in D

3 0
3 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
vladimir1956 [14]

Answer:

Step-by-step explanation:

First you divide the total mulch (77 1/2) by the amount per bag (2 1/4). This will tell you how many bags of mulch you have.

The answer is 34.4444444 which is 34 full bags of mulch.

Now if one bag is $2.25, then what is 34 bags?

$2.25 multiplied by 34 is $76.5

Hope this helps your understanding

5 0
2 years ago
Please help I'm confused ​
Brums [2.3K]

Answer:

214

Step-by-step explanation:

set bc = to cd and solve for x

then substitute x into one of the equations and solve --> you should get 73

multiply 73 by 2 and then subtract that from 360

you should get 214

8 0
3 years ago
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