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2 years ago

What is the simplified form of 4(2x - 5) + 2(3x + Y)?

Mathematics

1 answer:

evablogger [386]2 years ago

5 0

Answer:

I think this is the answer! 2x3 + 5x2 - x - 6 let me know if it’s right :)

Step-by-step explanation:

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Nadia plans to paint her jewelry box. The box is shaped like a rectangular prism with the dimensions

Pachacha [2.7K]

Answer:

$132\ in^{2}$ is closest to the total surface area of the box

Step-by-step explanation:

we know that

The surface area of the box is equal to

$SA=2B+PH$

where

B is the area of the base

P is the perimeter of the base

H is the height of the box

we have

$L=7\frac{3}{4}\ in=\frac{7*4+3}{4}=\frac{31}{4}\ in$

$W=3\frac{1}{4}\ in=\frac{3*4+1}{4}=\frac{13}{4}\ in$

$H=3\frac{7}{8}\ in=\frac{3*8+7}{8}=\frac{31}{8}\ in$

Find the area of the base B

$B=LW$

$B=(\frac{31}{4})(\frac{13}{4})=\frac{403}{16}\ in^{2}$

Find the perimeter of the base P

$P=2(L+W)$

$P=2(\frac{31}{4}+\frac{13}{4}))$

$P=2(\frac{44}{4})=22\ in$

Find the surface area

$SA=2(\frac{403}{16})+22(\frac{31}{8})$

$SA=(\frac{403}{8})+(\frac{682}{8})$

$SA=\frac{1,085}{8}=135.625\ in^{2}$

6 0

3 years ago

Use substitution to solve the system. x=3y+5 5x-4y=14 ______________ x= y=

nataly862011 [7]

So what you do is go 5(3y+5)-4y=14 which equals 15y+25-4y=14 which turns into 11y+25=14 than you move the 25 over which equals 11y=-11 so y=-1 then you enter -1 in for y which looks like 5x-4(-1)=14 than you solve that which is 5x+4=14 than you move the 4 over and you get 5x=10 than x=2

x=2
y=-1

8 0

2 years ago

4.2z + 3.8z simplify the expression (Use the operation symbols in the math palette as needed. Simplify your answer. Use whole n

alexandr1967 [171]

Answer:

Step-by-step explanation:

Since these are like terms, add the numbers together and then put the z on.

4 0

2 years ago

How many square feet of outdoor carpet will we need for this hole

Leokris [45]

Can you describe it a little more- I have no clue how I’m suppose to solve that.

3 0

2 years ago

How to find points of inflection from first derivative graph

SCORPION-xisa [38]

To find where the second derivative of the function changes sign, from negative to positive, or vice-versa. So, we find the second derivative of the given function.

7 0

2 years ago