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Igoryamba
3 years ago
7

Help please!! I’ll mark you brainliest if you get it right!!!

Mathematics
2 answers:
ZanzabumX [31]3 years ago
7 0
(8x^2+9) - (6x^2+2x+2)
8x^2-6x^2-2x+9-2
(8x^2-6x^2)+(9-2)-2x
2x^2-2x+7

So the answer would be B
Nuetrik [128]3 years ago
3 0
8x^2 + 9 - 6x^2 - 2x - 2
= 2x^2 - 2x + 7

answer is B
2x^2 - 2x + 7
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Your family goes to a Southern-style restaurant for dinner. There are 7 people in your family. Some order the chicken dinner for
butalik [34]

Answer:

a) 4 people ordered streak dinner

b) 3 people ordered chicken dinner

Step-by-step explanation:

Let the number of people that ordered steak dinner be x

and the number of people that ordered chicken dinner be y

From the question,

There are 7 people in your family

Hence, we can write that

x + y = 7 ...... (1)

Also from the question

Some order the chicken dinner for $13 and some order the steak dinner for $18 and the total bill was $111.

We can then write that

13y + 18x = 111 ...... (2)

From equation (1)

x + y = 7

Then,

x = 7 - y ...... (3)

Put this into equation (2)

13y + 18x = 111

13y + 18(7 - y) = 111

13y + 126 - 18y = 111

-5y = -15

5y = 15

y = 15 / 5

y = 3

Put the value of y into equation (3) to get x

x = 7 - y

Then

x = 7 - 3

x = 4

Hence, 4 people ordered streak dinner

and 3 people ordered chicken dinner

a) 4 people ordered streak dinner

b) 3 people ordered chicken dinner

3 0
3 years ago
Q is the midpoint of line segment PR. PR=9x-31 and QR=43 ; find x
bulgar [2K]

notice that, if Q is the midpoint of PR, that simply means that PQ = QR = 43.


\bf \boxed{P}\underset{\leftarrow 9x-31 \to }{\stackrel{\stackrel{\downarrow }{43}}{\rule[0.35em]{10em}{0.25pt}}Q\stackrel{43}{\rule[0.35em]{10em}{0.25pt}}}\boxed{R}
\\\\\\
9x-31=43+43\implies 9x-31=86\implies 9x=117
\\\\\\
x=\cfrac{117}{9}\implies x=13

5 0
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vampirchik [111]

Answer:

Step-by-step explanation:

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3 years ago
<img src="https://tex.z-dn.net/?f=xy%20%2B%206x%20%2B%203y%20%2B%2018%20%5C%5C%20" id="TexFormula1" title="xy + 6x + 3y + 18 \\
Arisa [49]
I could answer this if you could tell me the value of one of the letters
6 0
3 years ago
Is √m+n = √m + √n for all values of m and n? Explain why or why not.
lukranit [14]

Step-by-step explanation:

√(m + n) = √m + √n

Square both sides:

m + n = m + 2√(mn) + n

Simplify:

0 = 2√(mn)

mn = 0

The equation is only true if either m or n (or both) is 0.

6 0
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