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iVinArrow [24]
3 years ago
11

What is the first step in solving this system with. Elimination Using Multiplication?

Mathematics
1 answer:
docker41 [41]3 years ago
3 0

Answer:

A. I will eliminate y    B. x = 10   y = -3  

Step-by-step explanation:

  x + 2y = 4

+ x - 2y = 16       Add the equations together

2x = 20              Divide both sides by 2

x = 10

Plug this into the first equation

10 + 2y = 4

-10          -10     Subtract 10 from both sides

2y = -6             Divide both sides by 2

y = -3

if this answer is correct, please make me Brainliest!

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1 - f = -5 the answer has to be 6 (show work) (please)
Anestetic [448]

Answer:

it is 6 because there is no other explanation to 1-f f=6!

Step-by-step explanation:

all i did was look 1 - f = 5 then f equaled 6!

8 0
3 years ago
20 points!!! first answer gets brainliast. Don't need too much explanation thank you!​
KengaRu [80]

Answer:

The answer to your question is below

Step-by-step explanation:

2. \sqrt{-128}                Just find the prime factors of 128 and simplify

   \sqrt{-2^{7}} = \sqrt{-2^{6} 2} = 2^{3}i \sqrt{2}

   8i\sqrt{2}

3.- \sqrt{-9} + \sqrt{-16}     Get the square roots and simplify

     3i + 4i

     7i

4.- None of the choices is equal to one, because the exponents are pair.

5.- 1/3x² + 10 = 7

    1/3x² = 7 - 10

    1/3x² = -3

         x² = -3(3)

         x² = -9

         x = ±3i

8 0
4 years ago
A pet store contains 35 light green parakeets (14 females and 21 males) and 44 sky blue parakeets (28 females and 16 males). You
snow_tiger [21]
You can use this formula <span>P(AorB) = P(A) + P(B) - P(AandB) 

Given:
35 LG (14 F & 21 M)
44 SB (28 F & 16 M)

Req:
- the probability that it is a female (F) or a sky blue (SB)

Sol:
</span>P(F or SB) = P(F) + P(SB) - P(F and SB) 
                 = [(14 F + 28 F)/(35 + 44)] + [(44 SB)/(35 + 44)] - [(28 F)/(35 + 44)]
                 = 53.16 + 55.70 - 35.44
                 = 73.42%

You have to deduct 28 female parakeets from 44 sky blue parakeets because the 28 parakeets are already accounted for in the female parakeets. You can also think of how many ways you can choose a female parakeet and a sky blue parakeet. Add all female parakeets (14 + 28) = 42. Sky blue parakeet equaled to 44. Minus the 28 female parakeets included in the sky blue parakeet to avoid double counting. 42 + 44 - 28 = 58 divided by 79 (35 + 44) total parakeets = 73.42%


7 0
3 years ago
The height in feet of a projectile with an initial
enot [183]

Answer:

thus is what i learnd as a baby 64CK NI>GGA DI PSY SH :]

Step-by-step explanation:

6 0
3 years ago
Find the percentage of change when 77 is decreased to 70. If necessary, round your answer to the nearest tenth
Svet_ta [14]
Change % = (77-70)/77 *100

= 100/11 = 9.1 % decrease

option C)

hope it helped
8 0
3 years ago
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