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LekaFEV [45]
3 years ago
13

What is the substitution equation for 7x-2y=35 and x-4y=5

Mathematics
1 answer:
Debora [2.8K]3 years ago
7 0

Answer:

y=0 and x=5

Step-by-step explanation:

multiplying equation 2 by 7 and subtracting it from equation 1 we get

7x-2y=35 - 7x-28y=35

26y=0

y= 0/26

y = 0

putting value of y in equation 1

7x -2(0) = 35

7x - 0 = 35

7x = 35

x = 35/7

x = 5

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lynn, jude and anne were given the function f(x)=-2x^2+32, and they were asked to find f(3). lynns answer was 14, judes answer w
AfilCa [17]
The only thing we need to here to find who is correct is evaluate the function f(x)=-2 x^{2} +32 at x=3. To do that we are going to replace x with 3 in the function:
f(x)=-2 x^{2} +32
f(3)=-2 (3)^{2} +32
f(3)=-2 (9) +32
f(3)=-18+32
f(3)=14

We can conclude that Lynn is correct. f(3) is indeed 14.
6 0
3 years ago
Please!!! I need help, this is the last question on my paper, I just want to go play video games for the weekend :'|
ANEK [815]
<h2><u>Functions</u></h2>

The relationship between both prices is determined by function (R - 1 = B + 2).

It is clear that for each pound less of brown rice there will be 2 more pounds of beans, with which there is a direct relationship between both quantities, which is determined through a function (R - 1 = B + 2).

Given that brown rice cost $ 2 per pound, and beans cost $ 1 per pound, and Alexa has $ 10 to spend on these items to make a meal for a dinner she is attending, to determine if it is the amount of rice purchased a function of the amount of beans purchased, the following calculation must be performed:

  • 2 x 5 + 0 = 10
  • 2 x 4 + 2 = 10
  • 2 x 3 + 4 = 10
  • 2 x 2 + 6 = 10
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Therefore, it is clear that for each pound less of brown rice there will be 2 more pounds of beans, with which there is a direct relationship between both quantities, which is determined through a function (R - 1 = B + 2).

Learn more about maths in brainly.com/question/9216080

3 0
2 years ago
2(x-3)+5=3(x-1) how to solve?<br>​
jasenka [17]

Answer:

2x-12+5=3x-3

1. subtract 3x-2x

-12+5=x-3

2.-12 add to 5

-7=x-3

3. add three to seven

-4=x

Step-by-step explanation:

6 0
3 years ago
4. Find the mean absolute deviation (MAD) for the following data:
serious [3.7K]
The MAD is 2.4861 (1repeating) <span> I hope that helps :-) Good luck</span>
7 0
3 years ago
Read 2 more answers
Find the missing angle<br>PLZ HELP ​
Nadusha1986 [10]

Answer:

The answer is 94 degrees.

Step-by-step explanation:

The total number of degrees in a triangle is 180.

So you would subtract 35 and 51 from 180.

180-35-51=94

Hope this helps <3

6 0
3 years ago
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