9514 1404 393
Answer:
32 dm
Step-by-step explanation:
Use the formula for the area of a triangle, and solve for the unknown.
A = 1/2bh
200 dm² = 1/2(12.5 dm)b
b = (200 dm²)/(6.25 dm) = 32 dm
The base of the triangle is 32 dm.
-15--16=1
-7-19=-26
y=mx+b
-26=m(1) +b
Answer: 3b+3s
Step-by-step explanation:
The first part of this question is:
<em>Rachel needs to write 3 book reports with b pages and 3 science reports with s pages during the school year. How do you write an algebraic expression for the total number of pages Rachel will need to write?</em>
This means Rachel has to write 3b+3s pages
Now, if Yassi has to write 3(b + s) pages, we can use the distributive property and the result is:
3(b + s)=3b+3s
Which is the same number of pages Rachel has to write.
Answer:
30 in^3
Step-by-step explanation:
5 x 3= 15 x 2= 30
First, expand
(2x + 3)² = (2x + 3)(2x + 3)
Use the FOIL method (First, Outside, Inside, Last)
(2x)(2x) = 4x²
(2x)(3) = 6x
(3)(2x) = 6x
(3)(3) = 9
4x² + 6x + 6x + 9
Combine like terms
4x² (+6x + 6x) + 9
4x² + 12x + 9
4x² + 12x + 9 is your answer
hope this helps
