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goldfiish [28.3K]
3 years ago
11

I PROMISE BRAINLIST 20 PTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Suppose you are building a brick border for a garden by stacking r

ows of bricks on top of each other. If the height of each brick is 2.5 inches and r represents the number of rows, which algebraic expression would represent the height of the brick wall?
(1 point)
A.)2.5 + r
B.)2.5r + r
C.)2.5
D.)2.5r
Mathematics
1 answer:
avanturin [10]3 years ago
8 0

Answer:

2.5r D is the answer.

Step-by-step explanation:

It is 2.5 r because it makes the most sense for a real world situation like this.

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HELP ME I NEED HELP NOW I WILL GIVE CREDIT TO PEOPLE WHO ANSWER
kap26 [50]

Answer:

c

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Regular quadrilateral prism has an altitude h = 11 cm and base edges b=8 cm. Find the sum of all edges.
maxonik [38]
The sum of all edges is 108 cm.

There are two bases whose edges are all 8 cm; this gives us 8(4)+8(4) = 32+32=64.

There are 4 edges between bases that are 11 cm each; 11(4) = 44

Together, this gives us 64+44=108 cm.
7 0
3 years ago
Write a polynomial function $f$ of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros.
olganol [36]

Answer:

f(x) = x^{3} + 4x^{2} -7x^{} -10^{}

Step-by-step explanation:

The zeros of the polynomial function are given us as -5,-1,2

If the zeros of a polynomial function are α,β,ω, the polynomial function can be obtained using the expression below:

f(x) = (x - α)(x - β)(x - ω)

where α = -5, β = -1, and ω = 2

f(x)=(x-(-5) )(x -(-1))(x - 2) = (x+5)(x+1)(x-2)\\\\f(x)=(x+5)(x^{2} -2x + x -2) = (x+5)(x^{2}  -x-2)\\\\f(x)=x(x^{2}  -x-2)+5(x^{2}  -x-2)\\\\f(x)= x^{3} - x^{2} -2x + 5x^{2} - 5x - 10\\\\f(x)= x^{3} + 4x^{2} -7x - 10

<em>NB: To arrive at the answer, expand the brackets and after expansion, collect like terms to obtain the final answer</em>

4 0
3 years ago
4/25 of the purchases were stuffed animals. 10/21 of them were bears. What fraction of the purchases were stuffed bears?
Bess [88]
Let's name all the purchases "x"

so \frac{4}{25}of them were stuffed animals, and out of that \frac{10}{21} were bears.

to get the results we have to multiply the fraction of bears by the fraction of the stuff animals:

\frac{4}{25}*\frac{10}{21}.
 
and now we simplify:
\frac{4*2}{5*21}=\frac{8}{105}

and this is the answer!






4 0
3 years ago
4) Solve for x: 2x=8.
MatroZZZ [7]
4) x=4  -> divide by 2
5) y=9  -> add 2
6) z=2 -> multiply 2 times 1
7) a=10   -> add 7 then divide by 3
8) b=3  -> distributive property, add 1 to other side, and then divide by 8
9) c= -d +4   -> subtract +d+1 and put on other side to solve
10) m= 10/p+2  -> distrubutive property, subtract 2m on both sides to solve
8 0
2 years ago
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