Please help, test review. Need done today

Answers

Answer 1

Answer: d=number of drinks
p=number of bags of popcorn

75=6d+8p
100.50=12d+10p

multiply first equation by -2 and add to first
-49.50=-6p
divide -6
8.25=p
sub

100.50=12d+10p
100.50=12d+82.50
minus 82.50
18=12d
divide 12
1.50=d

$1.50 per drink

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Solve - 2x - 8> 3x + 12.Please help!

|2n+5|>/9 solve for n?

Answers

$|2n+5|\geq9\iff2n+5\geq9\ or\ 2n+5\leq-9\ \ \ |subtract\ 5\ from\ both\ sides\n\n2n\geq4\ or\ 2n\leq-14\ \ \ \ \ |divide\ both\ sides\ by\ 2\n\n\boxed{n\geq2\ or\ n\leq-7}\n\nAnswer:\boxed{\boxed{n\in(-\infty;-7]\ \cup\ [2;\ \infty)}}$

$|2n+5|\geq9\n2n+5\geq 9 \vee 2n+5\leq-9\n2n\geq4 \vee 2n\leq-14\nn\geq2 \vee n\leq-7\nn\in(-\infty,-7\rangle\cup\langle2,\infty)$

Solve each pair of simultaneous equation only by substitution method
8x+3y=7
3x+5y= -9

Answers

x = 2, y = -3

8x + 3y = 7
3y = -8x + 7
y = -8/3x + 7/3

3x + 5y = -9
3x + 5(-8/3x + 7/3) = -9
3x - 40/3x + 35/3 = -9
9/3x - 40/3x + 35/3 = -27/3
-31/3x = -62/3
-31x = -62
x = 2

8(2) + 3y = 7
16 + 3y = 7
3y = -9
y = -3

Check
3(2) + 5(-3) = -9
6 - 15 = -9
-9 = -9 :)

LOOK AT PICTURE THEN ANWSER QUESTION, WHOEVER HAS CORRECT ANSWER I WILL MARK BRAINIEST!

Answers

I am pretty sure it is D. It’s definitely greater or equal to so it’s either B or D

Solve for p in the literal equation 7p + 9r = 9.
p =

Answers

Answer:

p = -7

Step-by-step explanation:

7p + 9r = 9

-9 -9

7p = 0

-7 -7

p = -7

Translate the verbal phrase into an inequality. All real numbers that are greater than or equal to -1.5 and less than 9.2

Answers

Answer: -1.5 ≤ x < 9.2

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

"All real numbers": we will use the variable x to represent all the real numbers.

"All real numbers that are greater than or equal to -1.5". This means that x is greater or equal (≤) to the number 1.5.

"And less than 9.2": less is represented with the symbol <

Mathematically speaking:

-1.5 ≤ x < 9.2

Feel free to ask for more if needed or if you did not understand something.

4 is because it is greater and less than

Find the total area the regular pyramid.

Answers

Answer:

$4+4√(10) \n72+24√(3) \n144+36√(3) \n16√(3)\n 18√(91) +54√(3) \n$

Step-by-step explanation:

The above answers are for total area. They belong to the lesson called Solid's: Pyramids. They are in order so find each T.A question and input the answer accordingly.

To find total are of a regular pyramid, we add 4 times the area of one side and the area of base.

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