Answer:
1) When x is 1, y is 4, and vice versa
2) When x is -6, y is 42, and when x is 7, y is 114
3) When x is -2, y is 2, and when x is 8, y is 42
Step-by-step explanation:
1)
which can be rearranged as 
.
Substituting this lone y into the first equation, you get:
Move everything to one side:
Factor:
2)
which can be rearranged as 
.
Let's use elimination this time and subtract the first equation from the second:
Factor:
3)
Let's set the two equations equal to each other through substitution:
Move everything to one side:
Factor:
Hope this helps!
hmmmm
b = brother
s = sister
a = my age
so your brother is 5 years older, b = a + 5.
and your sister is 3 years younger, s = a - 3.
that means your sister is
![\bf \begin{cases} b=a+5\implies b-5=\boxed{a}\\ s=a-3\\[-0.5em] \hrulefill\\ s=\boxed{b-5}-3\implies s=b-8 \end{cases} \\\\\\ \stackrel{\textit{if your sister is "m" years old, say s = m}}{m=b-8}\implies \blacktriangleright m+8=b \blacktriangleleft](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Bcases%7D%20b%3Da%2B5%5Cimplies%20b-5%3D%5Cboxed%7Ba%7D%5C%5C%20s%3Da-3%5C%5C%5B-0.5em%5D%20%5Chrulefill%5C%5C%20s%3D%5Cboxed%7Bb-5%7D-3%5Cimplies%20s%3Db-8%20%5Cend%7Bcases%7D%20%5C%5C%5C%5C%5C%5C%20%5Cstackrel%7B%5Ctextit%7Bif%20your%20sister%20is%20%22m%22%20years%20old%2C%20say%20s%20%3D%20m%7D%7D%7Bm%3Db-8%7D%5Cimplies%20%5Cblacktriangleright%20m%2B8%3Db%20%5Cblacktriangleleft)
Do you think you can send a picture of the problem I’m not really understanding
Answer: 17/2
Step-by-step explanation:
1- <u>Add</u> up the numbers.
2- Cut 2 below the second fraction with 2 cubed, then 2 will be squared.
3- Solve the potentiation (2 squared is equal to four, because 2 * 2 = 4)
4- And, finally, compute 9/2 + 4. It will give 17/2.
Answer:
520 miles
Step-by-step explanation:
65 mph * 8 hours = 520 miles
I hope this helps :)
