Answer:
Step-by-step explanation:
price of 1 pen= $ 2
price of 1 pencil= $1
total money spent= $12
Let the number of pen be a and number of pencil be b.
2 a + b = 12 ----------------Equation 1
We have, she bought 3 more pens than pencils
a - b = 3 ------------------ Equation 2
Equation 1 +Equation 2,
2 a + b + a - b = 12 + 3
3a = 15
a = 5
Substituting in equation
5 - b = 3
b = 2
Number pencils Ava bought = 2
Answer:
The difference of the time taken for each of the two journeys is given as follows;
The difference of time = 2000/(x·(x + 10))
Step-by-step explanation:
The speed with which the car completes the 200 km journey = x km/h
The speed with which the car completes the return journey = (x + 10) km/h
Let t₁ represent the time it takes the car to complete the 200 km and let t₂ represent the time it takes the car to complete the return journey, we have;
t₁ = 200/(x)
t₂ = 200/(x + 10)
The difference of the time taken for each of the two journeys = t₁ - t₂
We have;
t₁ - t₂ = 200/(x) - 200/(x + 10)
200/(x) - 200/(x + 10) = (200·(x + 10) - 200·x)/((x)·(x + 10)) = 2000/((x)·(x + 10))
∴ t₁ - t₂ = 2000/((x)·(x + 10)) = 2000/(x·(x + 10))
The difference of the time taken for each of the two journeys = t₁ - t₂ = 2000/(x·(x + 10))
Well in a way...im not sure. lets see if we are dealing with statistical and last time i checked thats a part of math soo she/he is wondering how many TIMES the other person so...some part of be is saying Yes But then again no...you choose its your question xD (hope i helped somewhat)
Answer:
You should add .
Step-by-step explanation:
In order for + _ to equal 4, the numerator would have to equal 6 times the denominator after you add the number.
The denominator is 4, so the numerator should be 4 × 6, which equals 24. You should add something to make the numerator equal 24 and keep the denominator 4.
number = (24 - 23)/4 = 1/4
You should add .
Y = 1
y= 10-3x
y= 10-3(3)
y= 10-9
Therefore, y = 1