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sesenic [268]
3 years ago
6

Would this be X = 5. HElp asap

Mathematics
1 answer:
Art [367]3 years ago
6 0

Answer:

I think so. Just check your work backwards. Plug in x for 5 and see if you come to an answer that you know is 100% correct.

Hope that helps!

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Todd is 81 years younger than Rosa. 3 years ago, Rosa’s age was 4 times Todd’s age. How old is Todd now?
Delvig [45]
Let t represent Todd's age now.
.. 4(t -3) -(t -3) = 81 . . . . . . 3 years ago, their differnce in ages was 81.
.. 3t -9 = 81
.. t = (81 +9)/3 = 30

Todd is 30 now.

_____
You can also work this by considering "ratio units." 3 years ago, the ratio of their ages was 4:1, a difference of 3. That difference corresponds to 81 years, so each "ratio unit" represents 81/3 = 27 years. Todd's age then was 1 ratio unit, 27 years. Now, Todd's age is 30.
8 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%7B10%7D%5E%7B2%7D%20%20%2B%207x%20%2B%201" id="TexFormula1" title=" {10}^{2} + 7x + 1" al
irina1246 [14]

Answer:

factors of 7: 1, 7

factors of 10: 2, 5

1*-2 = -2

7*-5 = -35

...

-35 + -2 = -37

Step-by-step explanation:

8 0
2 years ago
Which of the matrixes can be added together? Choose all that apply.
katen-ka-za [31]
<h3>Answer: A and C</h3>

Both matrices are 1 x 4 matrices. This notation says there is 1 row and 4 columns. The number of rows must match up, as well as the number of columns, in order for matrix addition to be possible. This is so the corresponding elements pair up and add together. For instance, the 5 and -2 pair up and add together for matrices A and C.

4 0
2 years ago
What set of fractions equals 1 1/2?
enot [183]

Answer:

3/2 6/4 12/8

Step-by-step explanation:

4 0
3 years ago
What is the circumference of a circle if the diameter is 12 in
Delvig [45]
Answer:  
______________________________________________________
The circumference (in terms of "π") is:  " 12π  in. " .
__________________________________________________________
The circumference (using "3.14" as an approximation for "π") is: " 37.7 in. " .
__________________________________________________________

Circumference, "C" = π* d ; (d = diameter = 12 in.); 

C = π* d = π * 12 in. = " 12π  in. "  (in terms of "π").

Or, using the approximation, "π ≈ 3.14" ;

C = 3.14 * (12 in.) = 37.68 inches ; round to:  " 37.7 in. " .
______________________________________________ 
6 0
3 years ago
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