The ordered pair is (–1, –2)
Solution:
Given system of linear equations are
4x –7y = 10 – – – – (1)
3x + 2y = –7 – – – – (2)
To solve this by elimination method.
First multiply equation (1) by 3 and then multiply equation (2) by 4.
(1) × 3 ⇒ 12x –21y = 30 – – – – (3)
(2) × 4 ⇒ 12x + 8y = –28 – – – – (4)
Subtract equation (4) from equation (3), we get
⇒ 12x –21y – (12x + 8y) = 30 – (–28)
⇒ 12x –21y – 12x – 8y = 30 + 28
Combine like terms together.
⇒ 12x – 12x –21y – 8y = 30 + 28
⇒ –29y = 58
Divide both sides by –29, we get
⇒ y = –2
Substitute y = –2 in equation (1), we get
(1) ⇒ 4x –7y = 10
⇒ 4x – 7(–2) = 10
⇒ 4x + 14 = 10
⇒ 4x = 10 – 14
⇒ 4x = –4
Divide both side by 4, we get
⇒ x = –1
Hence the ordered pair for the given system of equations is (–1, –2).
Answer:
so the answer is C
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Answer:
I yard =3 feet that means
Step-by-step explanation:
5 yards =5×3
or, 15
. 5 ýard = 15 feet
Given:
The pie chart shows the flavours of ice cream sold by a shop in one day.
There were a total of 270 ice creams sold.
To find:
The number of vanilla flavoured ice creams sold.
Solution:
We know that the complete central angle is 360 degrees.
From the given pie chart, it is clear that the central angle of the vanilla flavoured ice creams sold is 60 degrees.
Total ice creams sold = 270
Now, the number of vanilla flavoured ice creams sold is
Therefore, the number of vanilla flavoured ice creams sold is 45.
The answer is 7, 3 plus 1 equals 4 minus four equals zero plus 7= 7