Answer:
Calcium in a cup of milk x = 330 mg
Calcium in cup of spinach y = 150 mg
Step-by-step explanation:
Let call " x " and " y " quantity of calcium ( in mg ) in a cup of milk, and spinach respectively, then according to problem statement we have:
3*x + 1*y = 1140 and 2*x + 2*y = 960
We have a two equation system, we need to solve for x and y then:
y = 1140 - 3*x
2*x + 2 * ( 1140 - 3*x ) = 960
2*x + 2280 - 6*x = 960
-4*x = - 2280 + 960
-4*x = - 1320
x = 1320 / 4 ⇒ x = 330 mg
And y = 1140 - 3*x
y = 1140 - 3* 330 ⇒ y = 1140 - 990 ⇒ y = 150 mg
"3 va después de 5 y entre 7 y 12" = "3 goes after 5, and between 7 and 12"
This eliminates A and D (3 is not between 7 and 12 in either choice).
"5 va antes de 12 y entre 7 y 3" = "5 goes after 12, and between 7 and 3"
This eliminates C (5 is not between 7 and 3).
So the correct sequence is B.
He cannot run 5km in 15.25 minutes
A square has all of the same sides, so just do 12x12 which is 144
Perimeter is the sum of all outside dimensions.
Solve for x first:
12 + x+7 + x+2 + 5 + x +4 + x + 4 = 42
Combine like terms:
4x + 34 = 42
Subtract 34 from both sides:
4x = 8
Divide both sides by 4:
X = 2
Now solve for EF by replacing x:
EF =. X + 7 = 2 + 7 = 9 feet.
