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Len [333]
3 years ago
7

How do I solve the symptoms of linear equations by substitution 2x-y=23x-9=-1​

Mathematics
2 answers:
JulsSmile [24]3 years ago
7 0

Answer:

x = 8, y = -7

in coordinate form: (8,-7)

Step-by-step explanation:

first, find x using the second equation:

x - 9 = -1

add 9 to both sides of the equation

x - 9 + 9 = - 1 + 9

x = -1 + 9

x = 8

next, substitute x for 8 in the first equation:

2x - y = 23

2 * 8 - y = 23

16 - y = 23

16 - y + y = 23 + y

16 = 23 + y

16 - 23 = y

y = -7

also, I had this exact question on an assignment earlier today ahah

Ivan3 years ago
6 0
Yes!! the person above got the correct answer!! hope you have an awesome day!!
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The length of the side of square A is 50% of the length of the side of square b
galben [10]

Answer:

25%

Step-by-step explanation:

let length of 1st square be x and second be y

then

A/q

x = y/2

area of first square = x^2 = (y/2)^2 = (y^2)/4

and

area of second square = y^ 2

so from sbove two lines

area of first square = 1/4 * area of second square

= 1/4 *100%

so..

area of first sqare = 25% of area of second square

8 0
3 years ago
Please help me on this question as soon as possible
lbvjy [14]
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7 0
3 years ago
Principal, $2000; Annual interest rate, 5.4%; time, 2 years; The balance after 2 years is?
Sloan [31]
P = $2000
R = 5.4%
T = 2 yrs

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3 0
3 years ago
Mark ran 2 1/3 km and Shaun ran 3 1/5 km. Find the difference in the distance that they ran.
soldier1979 [14.2K]

Answer:

7/15 km

Step-by-step explanation:

Find the least common denominator between the two fractions. The least common denominator in this case would be 15, so you have to multiply 1/3 by 5 to have a denominator of 15. Then you multiply 1/5 by 3 to have a denominator of 15. You will find that Mark ran a distance of 2 5/15 km and Shaun ran 3 3/15 km. To make it even easier, you can add the whole number back into the fraction so Mark will have ran 35/15 km and Shaun will have ran 48/15 km meaning that Shaun will have ran more. Then you set you fractions up and subtract them.

6 0
3 years ago
a local bbq restaurants offers 2 side dishes with a lunch plate. there are 7 side dishes. how many choices of side dishes does a
Sonja [21]

The number of choice out of 7 that consumer have are 42.

<h3>What is permutation?</h3>

The term permutation alludes to a numerical computation of the quantity of ways a specific set can be sorted out. Set forth plainly, a change is a word that depicts the quantity of ways things can be requested or organized. With stages, the request for the course of action matters.

<h3>According to given data:</h3>

Number of choices of side dishes does a customer have,

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ⁿP₂

⁷P₂

7×6 = 42

Thus required number of ways are 42.

To know more about permutation visit:

brainly.com/question/13715183

#SPJ4

7 0
1 year ago
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