Answer:
28
Step-by-step explanation:
add 3
4+3 = 7
7+3 = 10
10+3 =13......
Answer:
1/2
Step-by-step explanation:
Sine is opposite over hyp.
So the opp is 5 and the hyp is 10
5/10 equal 1/2
Answer:
x > 2
Step-by-step explanation:
5x +7 > 17
5x > 10
x > 2
Answer:
![y=2x](https://tex.z-dn.net/?f=y%3D2x)
Step-by-step explanation:
The line passes through the origin,
so its equation is of the form;
![y=mx](https://tex.z-dn.net/?f=y%3Dmx)
The graph also passes through
.
We substitute this point to obtain;
![4=2m](https://tex.z-dn.net/?f=4%3D2m)
We divide both sides by 2 to get;
![2=m](https://tex.z-dn.net/?f=2%3Dm)
We substitute the value of m into the equation to get;
![y=2x](https://tex.z-dn.net/?f=y%3D2x)
The correct answer is A
6. One variable only so pretty straightforward.
length-x+4
width-x
x+x+4=80
2x=76
x=38
x+4=42
answer: length 42cm and width 38cm
7. Another money problem!
n-# of nickels
q-# of quarters
n=3+q
0.05n+0.25q=2.85
Substitution works like a charm!
0.05(3+q)+0.25q=2.85
0.15+0.05q+0.25q=2.85
0.3q=2.7
q=9
n=3+q
n=3+9
n=12
answer: 9 nickels and 12 quarters
8. One variable situation again.
Ann's money-2b+9
Betty's money-b
b+2b+9=60
3b=51
b=17
2b+9=43
answer: Ann has $43 and Betty has $17.
9. # of red m&m's-x+1
# of blue m&m's-x
x+1+x=13
x=6
x+1=7
answer: 6 blue and 7 red m&m's
10. a-number of adult tickets
s-number of student tickets
a+s=785 ----> a=785-s
5a+2s=3280
5(785-s)+2s=3280
-3s=-645
s=215
a+s=785
a+215=785
a=570
answer: 215 children tickets and 570 adult tickets