Answer: 52 books
Step-by-step explanation: it's reverse math. Subtract the books that she bought from the amount she has now and then multiply by 2 (39-13=26•2=52)
Answer:
YZ = 25.40 correct to 1dp
Step-by-Step explanation:
Sin16°= XZ/YZ
YZ=XZ/sin16°
YZ=7/0.276
YZ=25.3623188405797
YZ = 25.40 correct to 1dp
Answer:
a. $4
b. Noah has 5/5. Elena has 4/5.
Step-by-step explanation:
Noah has $5.
a.
Elena has 80% of Noah's money.
80% of $5 = 0.80 * $5 = $4
b.
Noah has $5. We can consider $5 to be the full amount.
A full amount is 100% or 1 or 5/5.
Elena has 80% of Noah's money, so she has 80/100 of Noah's money.
80/100 reduces to 4/5.
Noah has 5/5, and Elena has 4/5.
Answer:
All real values of x such that x ≥-3
Step-by-step explanation:
g(x) = sqrt(x+3)
A sqrt must be greater than or equal to zero
sqrt (x+3) ≥ 0
Square each side
x+3≥ 0
Subtract 3 from each side
x ≥-3
The restrictions on x are x ≥-3
That means the domain is x ≥-3
All real values of x such that x ≥-3
We need to formulate the equation of this problem.
Let x = the number of notes for denomination of 500
y = the number
of notes for denomination of 100
We need to formulate the system of equation,
X + y = 150
500x + 100y = 25,000
Solution:
X = 150 – y
Substitute the value of x to the other equation:
500 (150 – y) + 100y = 25,000
75,000 – 500y + 100y = 25,000
-400y = 25,000 – 75,000
-400y = -50,000
y = 125
x = 150 – 125 (substitute the value of y)
x = 25
Therefore, there are 25 notes for denomination of 500 and
125 notes for denomination of 100.