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babunello [35]
3 years ago
8

Can someone help (8 grade math)

Mathematics
1 answer:
Agata [3.3K]3 years ago
7 0

Answer:

Lateral surface area is the area of the sides, not including the base and top area, while total surface area is the entire surface area (including sides, base, and top).

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Percent of change markup discount
vichka [17]
You calculate the markup or markdown in absolute terms (you find by how much the quantity changed), and then you calculate the percent change relative to the original value. So they're really just another form of "increase - decrease" exercises.

Example:

A computer software retailer used a markup rate of 40%. Find the selling price of a computer game that cost the retailer $25.
The markup is 40% of the $25 cost, so the markup is:

(0.40)(25) = 10
Then the selling price, being the cost plus markup, is:

25 + 10 = 35

The item sold for $35.
4 0
3 years ago
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Andy wants to buy 20 candy bars. If there is a special sale for buy 2 candy bars get one free. How much will it cost to buy 20 b
igomit [66]

Answer:

what is the cost of 1 candy bar?

Step-by-step explanation:

7 0
3 years ago
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please help me with these problems.... please answer all the questions with the method I already started with... due at 11:59pm
dolphi86 [110]

Step-by-step explanation:

Howdy, did you do a, b, and c by yourself? Because there are some slight issues, so I'll do my best to explain.

a. 3x+5x

We know that x=2, so we can substitute 2 in for x right now, or we can combine like terms.

3x and 5x both have the variable x so we can add them easily to get 8x. If you substitute in 2, you're just multiplying 8×2, which is 16.

b. 5z+4z+z

Again, since

we know that z=-3, we can substitute in now, or we can combine like terms first. 5z, 4z, and z all have the variable x, we addition is easy. 5+4+1=10, so you'll have 10z. Substitute in -3 for z, and you're just multiplying 10×-3=-30

c. 3x+6+5x

This is trickier since 6 doesn't have the variable x. So to combine like terms means to only add 3x and 5x. So the equation will turn out looming like 8x+6. now substitute in 2 for x and you get

8(2)+6

16+6

22

d. 8y+8-4y

Combine like terms

4y+8

substitute in 5 for y

4(5)+8

20+8

28

e. 5z-4z+z

combine like terms

z+z

2z

substitute -3 for z

2(-3)

-6

f. 3x+6+5x-2

combine like terms

(so that's 3x+5x and 6-2)

8x+4

substitute in 2 for x

8(2)+4

16+4

20

g. 8y+8-4y-3

combine like terms

8y-4y+8-3

4y+5

substitute in 5 for y

4(5)+5

20+5

25

h. 5z-4z+z-3z

combine like terms

-z

substitute in -3 for z

-(-3)

double negatives make a positive

3

6 0
3 years ago
Please help me with this!
Korolek [52]

Answer:

Step-by-step explanation:

DE = LK        {given that  length of DE & LK are equal}

EF = JK          {given that length of EF & JK are 8 cm}

DF = LJ        { given}

ΔDEF ≅ ΔLKJ   by   SSS congruent  

8 0
3 years ago
What is the value of 8.3 X 10 ? A. eight hundred thousand, thirty B. eighty-three thousand C. eight thousand, three hundred D. e
ycow [4]

Answer:

83

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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