Answer:
70
Step-by-step explanation:
Chem : Phy = 3: 2
Since we have 105 pupils studying Chem and let's say we have x students stuyding Phy.
We have :
x=70
Answer:
R = 30
Step-by-step explanation:
Given y is directly proportional to R² then the equation relating them is
y = kR² ← k is the constant of proportion
To find k use the condition when R = 4, y = 24, then
24 = k × 4² = 16k ( divide both sides by 16 )
1.5 = k
y = 1.5R² ← equation of proportion
When y = 1350 , then
1350 = 1.5R² ( divide both sides by 1.5 )
900 = R² ( take the square root of both sides )
= R , that is
R = 30
Answer:
the similarity statement helps you see that side RQ corresponds to UV, therefore 2x-4 : 5, and VW and QP are corresponding sides
Step-by-step explanation:
set up a proportion, then cross-multiply
2x-4/16 = 5/8
8(2x-4) = 16(5)
x = 7
The percent of discount on the backpack was 42.30%.
Step-by-step explanation:
Step 1:
From the given data, the original cost was $52 and it decreased to $30 due to a discount.
First, we need to determine the difference in values between the original price and the discounted price.
The difference between the prices
Step 2:
The percent decrease is given by dividing the difference in values by the original value multiplied by 100.
Percent decrease
Percent decrease
So there was a 42.30% discount on the backpack.
17.01 + 5 +2 + 3 = 27.01
Discount for winning tickets = 5+2 = 7
So total due = 27.01 - 7 = 20.01
$100 less $20.01 = $79.99