Answer:
B
Step-by-step explanation:
I looked it up
Answer:
When x = 8.4 and y = .8 then 4x + 8y = 40
Step-by-step explanation:
4x + 8y = 40
y = .8
Let's solve for x by substituting .8 for y (since y is given)
4x + 8(.8) = 40
4x + 6.4 = 40 Subtract 6.4 from both sides.
4x + 6.4 - 6.4 = 40 - 6.4
4x = 33.6 Divide each side by 4
4x/4 = 33.6/4 4 cancels on the left because 4/4 = 1
x = 33.6/4
x = 8.4
So when x = 8.4 and y = .8 then 4x + 8y = 40
Answer:
(B)Stratified
Step-by-step explanation:
Stratified sampling refers to a sampling method in which the entire population is first divided into groups/strata before a random sample is taken from each strata.
The school population in this case has been divided into these strata,
- Sophomore class
- Junior class; and
- Senior class
From these classes, a random sample of 49,39 and 48 students respectively was then taken,
Answer:
Radical: 5√13
Decimal: 18.0
Step-by-step explanation:
Given the dimension of the board given as 10ft by 15ft
If the board is nailed diagonally, the length of the bracing board will be gotten using the pythagoras theorem;
d² = 10² + 15²
d² = 100 + 225
d² = 325
d = √325
Expressing in radical form;
d = √325
d = √25*13
d = 5√13
Hence the length of the board in radical form is 5√13 feet
Express in decimal form;
d = √325
d = 18.0
Hence the length of the board to the nearest tenth is 18.0 feet
