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xxMikexx [17]
3 years ago
13

Simplify 3x^2(7x^2 + 2x -4)

Mathematics
1 answer:
arsen [322]3 years ago
6 0

Answer:

21x^4+6x^3-12x^2

Step-by-step explanation:

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A person wishes to mix coffee worth nine dollars per pound with coffee worth three dollars per pound to get 240 pounds of a mixt
Anastasy [175]
\bf \begin{array}{lccclll}
&amount&price&priced\ amount\\
&-----&-----&--------\\
\textit{9 bucks/lb}&x&9&9x\\
\textit{3 bucks/lb}&y&3&3y\\
-----&-----&-----&-------\\
mixture&240&5&1200
\end{array}
\\\\\\
\begin{cases}
x+y=240\implies \boxed{y}=240-x\\
9x+3y=1200\\
----------\\
9x+3\left( \boxed{240-x} \right)=1200
\end{cases}

solve for "x".

what about "y"? well, y = 240 - x
4 0
4 years ago
The bases of the trapezoid are 6 and 10. The heights is 4
dlinn [17]

Answer:

A=32

Step-by-step explanation:

Area of a trapezium=1/2(a+b)h

A=1/2(6+10)4

A=1/2(16)4

divide 16 by 2

A=(8)4

open the bracket

A=32

Check/ verify

A=1/2(a+b)h

32=1/2(6+10)4

32=1/2(16)4

divide 16 by 2

32=(8)4

32=32.

I hope this hopes?

8 0
3 years ago
Find the area of a square that has a side that measures 5 mm.
Oksanka [162]

Answer:

25 mm^2

Step-by-step explanation:

Because the sides of a square are all equal, that means the length = 5 and the width = 5.

To find the area, you do length * width so for this square it would be 5 * 5 = 25.

4 0
3 years ago
Read 2 more answers
A new fitness center opens with 120 members. Every month the fitness center increases the number of members by 40 members. How m
soldier1979 [14.2K]

Answer:

<u>240 members</u>

Step-by-step explanation:

Let y = total and x = no. of months

y = 40x + 120

= 40(3) + 120

= 120 + 120

= <u>240 members</u>

4 0
2 years ago
Can someone help me plz
katen-ka-za [31]

Answer:

I would choose c

Step -by- step explanation:

When you work out 4 oranges and 4 apples divided by 10 youll get 2 and a makes it a loss and also when you work out b its still a loss and there is a solution to the problem so it has to be c in my opinion.

3 0
3 years ago
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