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lana66690 [7]
3 years ago
13

Answer these three for me pls guys

Mathematics
1 answer:
Nataliya [291]3 years ago
8 0
11) X= 7, X= -7
(X+7)(X-7)=X^2+7X-7X-49=X^2-49

You might be interested in
Help me please explain do not need work just explain THANK YOU I NEED HELP
Mnenie [13.5K]
Alright, 

you will need to solve for each variable to find if they got the equation correctly or not.. 

Let's start with h 
isolate h 
(1/2)h = A/(b1+b2)
Now we need to get rid of 1/2 we may do so by multiplying both sides by 2 

h = 2(A/(b1+b2))

And that's not how they did it for h so Option D doesn't apply 


Let's see C
Also doesn't apply since they multiplied 2 only by A rather than A/h

Let's see B
Also not correct they made the same mistake as with option C

Let's see A
again same mistake 
when multiplying both sides by 2 
the 2 should be as following 
2\frac{A}{h}

I believe you should contact your instructor and explain that non of the options is right. 

6 0
2 years ago
Noah says to find 20% of a number he divides the number by 5. Is this true explain your answer
Nutka1998 [239]

Answer:

yes

Step-by-step explanation:

note that 20% = \frac{20}{100} = \frac{1}{5}

Hence to find 20% of a number, dividing the number by 5 is correct

20% of £30 = \frac{30}{5} = £6


5 0
3 years ago
Please answer this fast thank uuu :)
Serga [27]

Answer:

x + 37 = 90

Step-by-step explanation:

Since complementary angles add up to 90 degrees, we would need to add 37 and x to equal 90 degrees. Therefore, x + 37 equals 90 degrees. As for solving, subtract 37 from both sides and you are left with x = 53.

5 0
3 years ago
Which of the following is a monomial A. 12c B. C^2 -16 C. c^2+c+6 D. C^3 +4c^2 -12c + 7
abruzzese [7]
Answer is A. 12c
A monomial only consists of one term (12c), 
Binomials consist of two terms (c^2 - 16)
Trinomials consist of three terms (c^2 + c + 6)

An easy way of remembering which is which is to look at the prefixes. 
Mono= 1
Bi= 2
Tri= 3

8 0
3 years ago
Seventeen added to the product of six and a number equals 113
serg [7]

Answer:

16

Step-by-step explanation:

113-17= 96

96/6= 16

6 0
3 years ago
Read 2 more answers
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