Answer:
Irene spent $33.82 on gas to fill her tank.
I don’t know if im correct
its 7 because 7*7=49 and 49*7=343
so the cube root of 343 would be 7
Substitution is where we first Isolate one of the unknowns, express it in terms of the other unknown, and replace the isolated unknown with the other unknown in another equation. So that each time we only need to deal with one unknown. I think you'll get a better idea here:
First name these 2 equations with 1 and 2.
4x + 5y = 7 (1)
y = 3x + 9 (2)
Since y is already isolated in (2), so we can skip the isolation step and continue to substitute.
Substitute (2) into (1).
4x + 5(3x+9) = 7
Expand.
4x + 15x + 45 = 7
Group.
19x + 45 = 7
Shift +45 to the other side and turn it into -45.
19x = 7 - 45
19x = -38
Shift x19 to the other side, turn it into /19.
X = - 38/19
X = - 2
Now we solved x already, we can just substitute x= - 2 back to equation (2).
y = 3(-2) + 9
y = - 6 + 9
y = 3
So, the answers are
x = - 2
y = 3
Answer:
2400 people
Step-by-step explanation:
Let x be the number of people who had a swimming pool in the population of 10,000,
Thus, the ratio of people who had swimming pool to the total population = 
Since, out of 250 people 60 had swimming pool,
So, the ratio of the people who had swimming pool to the total population = 
Hence, 2400 people in the city might one expect to have a swimming pool.
First option is correct.
Answer:
(X+2)(v-5)
Step-by-step explanation:
first, group and factor out the greatest common factor and combine to get (x+2)(v-5)
