Answer: the answer is 36
Step-by-step explanation:
we can solve this using an algebra equation
so first from the world problem, we can tell that mother and daughter's ages added together is 45 we can represent this by saying x (mother's age), plus y (daughter's age) is 45.
(x+y)=45
Then we from the problem we know that 5 years ago the product of their ages is four times the mother's age at that time. From this, we can write
(x-5)*(y-5)=4*(x-5)
Then we just subtract the common denominators which is (x-5) so then the equation becomes
(y-5)=4
add 5 to both sides
y=9
Then all we do is plug the answer for y into the very first equation
x+9=45
Subtract both sides by 9
x=36
To double-check let's put the answers in the second equation
(36-5)*(9-5)=4*(x-5)
we get
(31)*(4)=4*(31)
so it's right I think
Answer:
2(4a + 1)
Step-by-step explanation:
combined like terms: 4a + 6a - 3a and 5 + 3 - 6
when you combined these 2 terms, it's 8
a
+
2
8
a
+
2 = 2(4a + 1)
your choices:
2(8a + 1) = 16a + 2 ( not what we are looking for)
2(8a + 2) = 16a + 4 ( not what we are looking for)
2(4a + 1) = 8a + 2 ( the answer that we are looking for)
8a + 4 ( we are looking for 8a+ 2 not 8a + 4)
Therefore, 2(4a + 1) is the correct answer
Answer:
6
Step-by-step explanation:
3! or 3x2x1 because there are 3 different choices at the first, 2 choices on the second and the last flavour is third.
5+5=10
y=5
b=5
the answer is 5 plus 5
