Answer:
C
Step-by-step explanation:
"At least 75" means Erin needs a score that is 75 <u>or more</u>. Her score should be equal to or greater than 75.
The number line that shows this is C because the point at 75 is filled in (showing that 75 is included), and the ray (arrow) extends to the right indicating numbers larger than 75.
Answer:
The first one: Kilo-liters to milliliters.
When converting on the metric table, always remember:
Converting from larger to smaller you multiply. Converting from smaller to larger, you divide.
Step-by-step explanation:
A variable on both sides a fractional coefficient on the left side and fraction on the right side. it should be 40
Answer:
24 and 32
Step-by-step explanation:
Let their present ages be x and y
Therefore, x

we have 4x = 3y
4x - 3y = 0......................(I)
After four years,

we have, 9(x + 4) = 7(y + 4)
9x + 36 = 7y + 28
9x - 7y = -8 ........................(ii)
Solving (I) and (ii) simultaneously
4x - 3y = 0
9x - 7y = -8
multiply eqn I by 9 and equation (ii) by 4 and subtract result
36x - 27y = 0...............(iii)
36x - 28y = -32...........(iv)
subtracting (iv) from (iii) we have,
y = 32
substituting y back in equation (I)
4x - 3y = 0
4x -3(32) = 0
4x - 96 = 0
4x = 96
x = 24
Their ages are 24 and 32
Answer:
Step-by-step explanation:
x = 61⁰
Reason: x + 29⁰ = 90⁰ ( right angles i.e the angles are perpendicular to one another)
x = 90⁰ - 29⁰
x = 61⁰