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IRISSAK [1]
3 years ago
15

Solve simultaniously 2x-y=3 3x+2y=8

Mathematics
2 answers:
Andre45 [30]3 years ago
8 0
ANSWER: ( 0.75 , 2 )

EXPLANATION:
To find the system of solutions, solve the 2 equations.
(1) Find what you can multiply with to get the same number in the second equation.
(2) Multiply equation by -2
(3) New equation:
-4x - 2y = -6
3x + 2y = 8
(4) Add both equations
(5) New equation:
7y = 14
(6) Divide both sides by 7
(7) New equation:
Y = 2
-
Now find X
(1) Substitute y with a equation
(2) 3x + 2 (2) = 8
(3) 3x + 4 = 8
(4) Subtract 4 both sides
(5) 3x = 4
(6) Divide 3 both sides
(7) x = 0.75
-
PLEASE MARK BRAINIEST :)
Aleonysh [2.5K]3 years ago
8 0
X=3+y/2
X=8–2y/3
Hope this helps.
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8 0
3 years ago
5 % of 170 is what number?​
Darina [25.2K]

Answer: 3400

Step-by-step explanation:

We have, 5% × x = 170

or,  

5

100

× x = 170

Multiplying both sides by 100 and dividing both sides by 5,

we have x = 170 ×  

100

5

x = 3400

If you are using a calculator, simply enter 170×100÷5, which will give you the answer.

4 0
3 years ago
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Find the value of c that makes each trinomial a perfect square<br> x^2-19x+c<br> Please Help! :)
tensa zangetsu [6.8K]

The value of c is \frac{361}{4}

Explanation:

Given that the trinomial is x^2-19x+c

We need to determine the value of c such that the trinomial is a perfect square.

The value of c can be determined using the formula,

c=(\frac{b}{2})^2

From the trinomial, the value of b is given by

b=-19

Substituting the value of b in the above formula, we have,

c=(\frac{-19}{2} )^2

Squaring both the numerator and denominator, we have,

c=\frac{361}{4}

Thus, the value of c is \frac{361}{4} which makes the trinomial a perfect square.

4 0
3 years ago
Ended up with 7 7 quarters. Which expression equals the number of dollars Monique spent on the book?
shtirl [24]

Answer:

6.25-1.75

Step-by-step explanation:

Step-by-step explanation:

Monique had 6 dollars. She found 25 cents and then bought a book

25 cents = 0.25 dollars

Total dollar she had= 6 + 0.25= 6.25 dollars

Let x be the cost of a book

She ended up with 7 quarters. Convert quarter into dollars

1 quarter = 0.25 dollars

7 quarters = 7 times 0.25=1.75 dollars

So she ended up with 1.75 dollars

Amount she had at the beginning - the cost of book = amount ended up

Number of dollars spent on the book = Amount she had - amount ended

Number of dollars spent on the book=

6.25-1.75

6 0
3 years ago
What is the value of x? <br> X + (-7) =2<br> Enter your answer in the box in simplest form.
Makovka662 [10]

move -7 to the right side of the equal sign which becomes +7

x=2+7

7 + 2 is 9

=9

5 0
3 years ago
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