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ludmilkaskok [199]
3 years ago
7

I need help please ..

Mathematics
1 answer:
koban [17]3 years ago
4 0

A is 18

B is 162

C is 18

D is 162

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Solve the system of equations using the linear combination method. {5m+3n=41 {3m−6n=9 Enter your answers in the boxes. m = n =
Masja [62]
These are linear equations that can be solved simultaneously;
5m+3n=41
3m-6n=9   (multiplying the first equation by 3 and the second by 5)

15m+9n=123
15m-30n= 45 (subtracting the two equations)
         39n = 78
             n = 2, 
and for m, 3m = 9+6(2)
                        = 21
                     m = 7
Therefore, n=2 and m=7
8 0
3 years ago
27x+3=6 what does x equal
Digiron [165]

Answer:

1/9

Step-by-step explanation:

27x+3 = 6

-3 -3

27x = 3

/27 /27

× = 3/27 = 1/9

8 0
3 years ago
Read 2 more answers
Question is in picture need help asap
Andrej [43]
The given expression is:

\sqrt[4]{ 9^{ \frac{1}{2}x } }

4th root is equivalent to raising the expression to power \frac{1}{4}. So, re-writing the expression by converting radical to exponent:

( 9^{ \frac{1}{2}x } )^{ \frac{1}{4} } \\  \\ 
= 9^{ \frac{1}{8}x }

Therefore, the given expression simplifies to 9^{ \frac{1}{8}x }
6 0
3 years ago
What is the factorization of the trinomial below -x^2 + 2x + 48
OlgaM077 [116]

For this case we must factor the following expression:

-x ^ 2 + 2x + 48

We take the sign "-" as a common factor of the expression, taking into account that:

- * - = +\\- (x ^ 2-2x-48)

To factor, we must find two numbers that, when multiplied, result in -48 and when added, result in -2. These numbers are -8 and +6.

-8 + 6 = -2\\(-8) * (+ 6) = - 48

Then, we factor the expression within the parenthesis as:

- ((x-8) (x + 6))

Answer:

- (x-8) (x + 6)

4 0
3 years ago
Average after 8 test is 91%. if he gets a 78% on his 9th test what will be the new acerage
Vika [28.1K]
All you need to do is add te averages together then divide them by 2. 91%+78%=169% 169%÷2=84.5% So the new test average is 84.5%
6 0
3 years ago
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