Answer:
1425
Step-by-step explanation:
∑ 1 ^30 (3n+1)=4+7+10+... 30 terms
a=4
n=30
d=7-4=3
![S_{30}=\frac{30}{2}[2 \times 4+(30-1) \times 3]\\=15[8+87]\\=15 \times 95\\=1425](https://tex.z-dn.net/?f=S_%7B30%7D%3D%5Cfrac%7B30%7D%7B2%7D%5B2%20%5Ctimes%204%2B%2830-1%29%20%5Ctimes%203%5D%5C%5C%3D15%5B8%2B87%5D%5C%5C%3D15%20%5Ctimes%2095%5C%5C%3D1425)
Answer:
x = 4, -10
Step-by-step explanation:
Find the zeros of the equations.
Solve the equation:
x^2 + 6x = 40
Subtract -40 from both sides.
x^2 + 6x - 40 = 0
Factor the equation.
(x - 4)(x + 10)
Solve for x with the given information by equaling it to 0.
x - 4 = 0
Add 4 to both sides
x = 4
x + 10 = 0
Subtract 10 from both sides
x = -10
This means that our x values are:
x = 4, -10
Answer:
-5 > -6.
Step-by-step explanation:
-5 is closer to 0 on a number line. Therefore, it is greater than -6.
4-(4*x)=3.60
4-4x=3.60
-4x=-.4
x=.1
.1*100=10
10% discount
p.s. this is not college level math