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nikklg [1K]
3 years ago
11

A survey of middle school students' food

Mathematics
1 answer:
lozanna [386]3 years ago
3 0
The answer is 62 B can u plz mark brainliest
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Please help :) I’m really in need of assistance and would appreciate it.
BaLLatris [955]

Answer:

D) 0.5x^3y + 4x^2 y^2 - 2xy^3

Step-by-step explanation:

Set up an equation to model the situation,

(-0.5xy)(x^2 + 8xy - 4y^2)

Distribute, multiply each term in the parenthesis with the term outside of the parenthesis. Don't forget the laws of exponents, when one multiplies two exponents, with the same base, then one adds the two exponents. A number with no exponential term is two the first degree meaning that it is to the power of one.

-0.5x^3 y - 4x^2 y^2 + 2xy^3

4 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
s2008m [1.1K]

Answer: 912

===================================

Work Shown:

The starting term is a1 = 3. The common difference is d = 5 (since we add 5 to each term to get the next term). The nth term formula is

an = a1+d(n-1)

an = 3+5(n-1)

an = 3+5n-5

an = 5n-2

Plug n = 19 into the formula to find the 19th term

an = 5n-2

a19 = 5*19-2

a19 = 95-2

a19 = 93

Add the first and nineteenth terms (a1 = 3 and a19 = 93) to get a1+a19 = 3+93 = 96

Multiply this by n/2 = 19/2 = 9.5 to get the final answer

96*9.5 = 912

I used the formula

Sn = (n/2)*(a1 + an)

where you add the first term (a1) to the nth term (an), then multiply by n/2

-----------------

As a check, here are the 19 terms listed out and added up. We get 912 like expected.

3+8+13+18   +23+28+33+38    +43+48+53+58    +63+68+73+78   +83+88+93 = 912

There are 19 values being added up in that equation above. I used spaces to help group the values (groups of four; except the last group which is 3 values) so it's a bit more readable.

5 0
3 years ago
Read 2 more answers
Solve for the indicated variable.<br><br> 2a + 2b = c for b<br><br> B = ?/?
kodGreya [7K]

Answer:

b =  c − 2a

     ------------

          2

Step-by-step explanation:

2a + 2b = c

2b = c − 2a

b =  c − 2a

     ------------

          2

7 0
3 years ago
At the local burger restaurant, you can get 4 value meals for $21.88. How much is each value meal?
Sidana [21]
If thats without tax its about 5.47
6 0
3 years ago
Read 2 more answers
Find the surface area of the solid below. Round to the nearest tenth it needed. Please someone helpppp
adoni [48]

your answer will be 1275 yd^2

Step-by-step explanation:

hope it helps

3 0
2 years ago
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