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AlekseyPX
3 years ago
12

—330 + 450 need help !!!!!!!

Mathematics
2 answers:
natta225 [31]3 years ago
7 0
120
hope that helps
Aleksandr-060686 [28]3 years ago
7 0

Answer:

120

Step-by-step explanation:

use a calculator (if you have one )

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You deposit $2200 into three separate bank accounts that each pay 3% annual interest. How much interest does each account earn a
Keith_Richards [23]
This can be solve using the formula:
F = P ( 1 + i)^n
where F is the money after n years
P is the initial amount of money
i is the annual interest rate
n is the time in years
since you deposit in 3 accounts P = 2200/3
F = ( 2200 / 3) ( 1 + 0.03)^6
F = $ 875.64 is the money each account earned after 6 years
7 0
3 years ago
How many solutions are there for the system x^2+4y^2=100 and 4y-x^2=-20
never [62]
There are 5 solutions for this system.

x^2 + 4y^2 = 100  ____1
4y - x^2 = -20  ____2
Add both 1 & 2 together. x^2 gets cancelled
4y^2 + 4y = 80   (send 80 to the other side and divide by 4)
Then equation the becomes : y^2 + y -20 =0
Now factorise the equation: (y+5) (y-4) = 0
Solve for y :  y = -5 and y = 4
Using the values of y to find the values of x. From equation 1:
x^2 = 100 - 4y^2    x = /100 - 4y^2  (/ means square root) Replace values of y
y = -5, x = /100 - 4(-5)^2 = /100 - 100 = 0
y = 4, x = /100 - 4(4)^2 = / 100 - 64 = /36 = -6 or 6
Thus we have 6 solutions y = -5, 4 and x = -6, 0, 6
6 0
3 years ago
Is 400 pt greater than 100 gal
Rufina [12.5K]

Answer:

no.400pts is equal to 50 gallons.1pt equals 0.125 gallons 400 pints x0.125 gallons equals 50 gallons,so that statement is false

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Is 180°, 2` a reflex angle?​
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yes it is .....,...............reflex angle

3 0
3 years ago
What is a rational number and how do you know?
Andreas93 [3]
A rational number is a number that can be express as the ratio of two integers. A number that cannot be expressed that way is irrational.

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