Answer:
10
Step-by-step explanation:
<u>A negative number with another negative sign is practically a positive number.
</u>
Example: -(-4)
-(-4)
-1 * -4
4
Question: -(-10)
-(-10)
-1 * -10
<em>10
</em>
Answer: 10
Answer:
Step-by-step explanation:
Since the ratio is 4x:4x:7x, if we add all those numbers up we get 15. Then we do 75/15 to get what x equals. So we get 5. So x equals 5. Following the rules of multiplication, you do 4(5):4(5):7(5), and simplifying that further, you get 20:20:35. If we add all those values up, we should get 75, and we do!
If you're wondering why I did 4x:4x:7x instead of 4:4:7, it's because a ratio is just a...well ratio? It's easier to visualize if you put a variable because the variable could be anything, and you would have to multiply all the given values to get the same proportions. In summery, I did it so it was easier to visualize
4/5=87+2(55:10)-33 so that will be your answer if you simplify it
Answer:
The recursive equation that models Barry's account balance is equal to
1.900+(n-1)150
or
150n+1,750
Step-by-step explanation:
Let
n -----> the number of months
f(n) -----> Barry's account balance
we know that
700-150-400=$150
so
The recursive equation that models Barry's account balance is equal to
f(n)=1,900+(n-1)150
f(n)=1,900+150n-150
f(n)=150n+1,750
To subsitute, we need to solve for 1 variable
let's solve for x in bottom equation
x-2y=2
add 2y both sides
x=2y+2
sub 2y+2 for x in other equation
-5(2y+2)+3y=11
-10y-10+3y=11
-7y-10=11
add 10 to both sides
-7y=21
divide both sides by -7
y=-3
sub back
x=2y+2
x=2(-3)+2
x=-6+2
x=-4
(x,y)
(-4,-3)
