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Molodets [167]
2 years ago
6

Solve x2 + 14x = -40 by completing the square.

Mathematics
1 answer:
zalisa [80]2 years ago
6 0

Answer: C x=-4 and -10

Step-by-step explanation:

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Which expression is equivalent to a2 + 2a – 8?
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Answer:

D

Step-by-step explanation:

(a+4)(a-2)=a^2+2a-8

a*a=a^2

a*(-2)=-2a

a*4=4a

4*(-2)=-8

a^2-2a+4a-8=a^2+2a-8

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3 years ago
What is the insverse of the function f(x) =2x+1?
goldenfox [79]
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To find the inverse of a function you just need to switch the x by y or vice-versa:

-> y = 2x + 1
-> x = 2y + 1

After that you isolate the y again:

-> 2y = x - 1

-> y = (x-1)/2
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Answer:
f^{ - 1} (x) = (x - 1) \div 2
5 0
3 years ago
I don't understand this question can you help me please
Maslowich
I believe the answer is A because the formula for area is length times width. 
5 0
3 years ago
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How many leaves on a tree diagram are needed to represent all possible combinations tossing a coin 4 times?
gtnhenbr [62]
1/2 x 1/2 x 1/2 x 1/2 = 1/16

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6 0
3 years ago
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Which of the following pairs have similar terms<br>-6y,7x / 13,9y / 2x,x3 / -2x,7x
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Step-by-step explanation:

-2x,7x and 2x,x3

look for the same variables or look if they both have a negative or a positive without a variable , example: -2.345 has the same terms as -5.99

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