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Lesechka [4]
3 years ago
7

Solve the simultaneous equations: 4x - y = 22 3x + 4y = 26

Mathematics
1 answer:
Nonamiya [84]3 years ago
6 0
4x - y= 22 /x 4
<u>3x+4y=26
</u>
16x - 4y = 88 }+
3x + 4y = 26

16x + 3x - 4y + 4y = 88 + 26
19x = 114 / :19
<u>x = 6

</u>3x + 4y = 26
4y = 26 - 3*6
4y = 8 /: 4<u>
y = 2</u>
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When y=7.5 x=2 what is the value of y when x is 2 1/4
swat32
<h2>Answer:</h2>

The value of y is 8.4375

<h2>Step-by-step explanation:</h2><h3>Known :</h3>
  • y = 7.5
  • x = 2

<h3>Asked :</h3>
  • The value of y when x is 2.25

<h3>Solution :</h3>

2/7.5 = 2.25/y

Do a cross multiplication,

2/7.5 = 2.25/y

=> 20/75 = 2.25/y

=> 75 . 2.25 = 20y

=> 168.75 = 20y

Reverse the equation,

168.75 = 20y

=> 20y = 168.75

Find the value of y,

20y = 168.75

=> y = 8.4375

<h3>Conclusion :</h3>

y = 8.4375

7 0
2 years ago
If the rule of the function is "multiply by 2 then add 3" and the input value is -2, what is the output value?
miv72 [106K]
The equation would be 2x+3 so when you plug it in it's 2(-2)+3 which simplify to -4+3 which is -1
5 0
3 years ago
Question 1
insens350 [35]

Answer:

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3 0
3 years ago
Use the terms below to create a linear equation with a solution of x = 10<br> Terms: x 2 4 5
yulyashka [42]

Answer:

x = \frac{4 * 5}{2}

Step-by-step explanation:

x = 10

x = 20 / 2

x = 4*5 / 2

5 0
3 years ago
Place the fractions 3 7 , 1 3 , 2 5 , and 3 8 in order from least to greatest.
eimsori [14]

Answer:

1/3,  3/8,  2/5,  3/7

Step-by-step explanation:

3/7 \approx 0.42857142857

1/3 \approx 0.33333333333

2/5 = 0.4

3/8 = 0.375

4 0
3 years ago
Read 2 more answers
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