X+y=8
multiply the first equation by 3 to get rid of x
3x+3y=24
3x+2y=14
subtract equation 1 from 2
y=10
substitute to find the value of x
x+10=8
x=-2
Answer:
senior and junior? that would be a perfect 100%, 29/29
Step-by-step explanation:
Unless I'm incorrect, this question states the probability of <u>BOTH</u> a senior <u>AND</u> junior being chosen, which would be 100% or again, 29/29
Answer:
y = 4
Step-by-step explanation:
(2/3 + 4) + (-3/2y + 1/3y) = 0
(-3/2y + 1/3y) = -4 2/3
-9/6y + 2/6y = -14/3
-7/6y = -14/3
cross-multiply:
-21y = -84
y = 4
Answer:
Step-by-step explanation:
if Jim eats r apples and Maria eats 3times as Jim then we can represent the number of times Maria eats as 3r
Together, the both eat 96 apples that is:
r + 3r = 96 apples - this is the equation for this situation.
Solving further
r + 3r = 96apples
4r = 96 apples (divide through the equation by 4)
4/4 r = 96/4 apples
Then
r = 24 apples
Which means that Jim eats 24 apples while Maria eats 3 * 24 apples = 72 apples.
Answer:
c)-5(3x+2y)(3x-2y)
Step-by-step explanation:
1) lets find out if -45 and 20 have a GCF
-45 and 20 are both dividable by -5 so
-5(9x^2-4y^2)
1) you can see that 9 and -4 are perfect square so:
-5(3x+2y)(3x-2y)
Recheck:
1) lets use FOIL to see if this is right(if its right we will get back our original equation)
-5(9x^2-6xy+6xy-4y^2)
-5(9x^2-4y^2)
-45x^2+20y^2
hope this helps!
