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Diano4ka-milaya [45]
3 years ago
6

I need help please it’s really hard for me and I wanna get a good grade

Mathematics
1 answer:
tekilochka [14]3 years ago
5 0

Answer:

Multiply 40 dollars times 12 which is how many months are in a year. You would get 480 so she would have enough money for her new video camera.

Step-by-step explanation:

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(3d^4)^2<br><br><br> In index form
enyata [817]

Answer:

9d^8

Step-by-step explanation:

i think

8 0
3 years ago
Can someone help me on this
Cerrena [4.2K]

Answer:

2x+h

Step-by-step explanation:

f(x+h) means that wherever there's an x in the function f(x) we plug in a x+h

we have

(x+h)²+9

Let's start with the numerator

(x+h)²+9-(x²+9)

Distribute the exponent

x²+2xh+h²+9-x²-9

Which gives us

2xh+h²

Divide the whole thing by h to give us

2x+h

4 0
3 years ago
What are the angles of rotation for a 20-gon?
Basile [38]
There are 360 degrees so divide 360 by 20 and get 18 degrees
4 0
3 years ago
Read 2 more answers
This is the rest of those 2 step equations with fractions teacher didnt help and taking a test over this tomorrow. Please help a
NNADVOKAT [17]
The answers to the questions

3 0
3 years ago
In a collection of nickels, dimes, and quarters worth $6.90, the ratio of the number of nickels to dimes is 3:8. The ratio of th
dimulka [17.4K]
N=number of nickels
d=number of dimes
q=number of quarters

example
if n:d=3:8
lets say n=3 and d=8
3*8=8*3
so
8n=3d
slightly confusing but go with it, it migh make sense or it might not


n:d=3:8
8n=3d

d:q=4:5
5d=4q

solve for one of them
solve for nickels in first and quarters in second

8n=3d, n=(3/8)d
5d=4q, (4/5)d=q

5n+10d+25q=690
divide by 5 to make it easeir
n+2d+4q=138
sub (3/8)d for n
sub (4/5)d for q
(3/8)d+2d+5(5/4)d=138
(3/8)d+2d+25/4d=138

3/8+2+25/4=
3/8+16/2+50/8=
69/8

(69/8)d=138
times both sides by 8
69d=1104
divide both sides by 69
d=16

16 dimes
sub back

(5/4)d=q
(5/4)16=q
80/4=q
20=q

(3/8)d=n
(3/8)16=n
48/8=n
6=n



6 nickles
16 dimes
20 quarters
yah
8 0
3 years ago
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