Answer:
Do 134 ÷ 2 = 67
Step-by-step explanation:
Answer:
(–1,4)
Step-by-step explanation:
x – y = –5
3x + y = 1
You omit Ys due to their positive and negative signs and you got
4x = –4===> x= –1
and now place –1 inside the upper linear equation and there you have the Y, look
–1 – Y= –5===> –Y= –4===> Y = 4
(–1,4)
Answer: -2
Step-by-step explanation:
Combine like terms
-4-2=-6
2+2=4
Now add 4 to -6 or subtract 6 from 4 (both will give you the same answer)
You should get -2
Answer:
the scores on her last test is x (x > 0)
because on her last tests she scored 4 points lower than she did on her fifth test
=> the scores in the 5th test is x + 4
because Angela’s average for six math tests is 87, we have:
![\frac{93 + 87 + 82 + 86 + x + x + 4}{6} = 87 \\ \\ < = > \frac{352 + 2x}{6} = 87 \\ \\ < = > 352 + 2x = 522 \\ \\ < = > 2x = 170 \\ \\ < = > x = 85](https://tex.z-dn.net/?f=%20%5Cfrac%7B93%20%2B%2087%20%2B%2082%20%2B%2086%20%2B%20x%20%2B%20x%20%2B%204%7D%7B6%7D%20%3D%2087%20%5C%5C%20%20%5C%5C%20%20%3C%20%20%3D%20%20%3E%20%20%5Cfrac%7B352%20%2B%202x%7D%7B6%7D%20%20%20%3D%2087%20%5C%5C%20%20%5C%5C%20%20%3C%20%20%3D%20%20%3E%20352%20%2B%202x%20%3D%20522%20%5C%5C%20%20%5C%5C%20%20%3C%20%20%3D%20%20%3E%202x%20%3D%20170%20%5C%5C%20%20%5C%5C%20%20%3C%20%20%3D%20%20%3E%20x%20%3D%2085)
=> on her last test, she had 85
=> on her 5th test, she had 85 + 4 = 89
Answer:
c
Step-by-step explanation: