MATHEMATICS HIGH SCHOOL

Which expressions, when evaluated with z = 8, are negative in value?Choose all answers that are correct.









A.

–2z – 14








B.

–25 + 4z








C.

–2z + 15








D.

30 – 3z

Answers

Answer 1
Answer: z=8\n\nput\ the\ value\ of\
Answer 2
Answer: To find out which equation is negative when you plug in z=8, then plug it in and find out! :D

A) –2z – 14 = -2(8)-14 = -16-14 = -30

-2x-14 is negative when z = 8. So A is one possible answer :)

B) –25 + 4z = -25 + 4(8) = -25 + 32 = 7

7 is positive when z = 8, so B is not a correct answer.

C) –2z + 15 = -2(8) + 15 = -16 + 15 = -1

-1 is negative when z  8, So C is another correct answer choice.

D) 30 – 3z = 30 - 3(8) = 30 - 24 = 6

6 is positive when z=8, So D is not a correct answer.

To summarize, your answer would be A and C.

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I know that y=20 and x=50 but will someone explain how to get them. Thanks!

Answers

given that A and B are parallel, you can conclude that 30 = x - y since they are corresponding angles. Also you can conclude that 5y = 2x since they are alternate interior angles. At this point, there is a solvable system of equations set up

30 = x - y

5y = 2x


Now, you must isolate a variable so let's isolate x from the 1st equation. so u just need to add y to both sides, getting x = 30 + y. Now you plug that into the 2nd equation and solve for y. 5y = 60 + 2y. Subtract 2y from both sides. 3y = 60. Divide by 3, y = 20.

Now with your y value, just plug back into original equation (the 1st one). 30 = x - 20. Solve for x by adding 20. X = 50

Of the 125 guests invited to a wedding, 104 attented the wedding. What percent of invited guests attented the wedding?

Answers

104/125*100%
0.832*100%
83.2%.....

A farmer has both pigs and chickens on his farm. there are 78 feet and 27 heads. how many pigs and how many chickens are there?

Answers

let p the number of pigs
and  c: number of chickens


   p    + c   =   27   ( there is one head for each  )

4 p + 2c = 78   ( 4 feet for pigs and 2 for chickens)
 


p= 12                 c= 15 

Jane has a checkbook balance of $68.00. She then writes two checks, one for $5.00 and one for $62.50. She also deposits $75.00. She then uses her calculator to determine her new balance. Which of the following is the correct series of keys she should press? A.ON/C 6 8 + 7 5 = 5 = 6 2 . 5 0B. 6 8 + 75 – 5 – 6 2 . 5 0C. ON/C 6 8– 5 – 6 2 . 5 0 + 7 5 =D. 6 8 + 75 – 6 2 5 0 – 5 =

Answers

C because you want to do the steps in order. She started out with $68 then you subtract $5 and & 62.50 Then you add the deposit of $75.00
C because 5 and 62.50 is what she took at of her account. But she put in $75 somyou add that

Which of these data sets is symmetrical?A) 1,8,15,15,15,22,22,22,29,36,43
B) 1,8,15,22,22,22,29,29,29,36,43
C) 1,8,15,15,22,22,22,29,29,36,43
D) 1,1,15,15,22,22,22,29,29,36,43

Answers

The answer is B

Hope this helps!

It's C. 1, 8, 15, 15, 22, 22, 22, 29, 29, 36, 43

Please help me with this question please is so hard

Answers

Answer:

1) $101,400

2) $27,000

Step-by-step explanation:

1) For this, we can first find how much she makes in a year from her salary alone:

$2,200×12= $26400.

Now, she also received a commission of 2.5%, so we can take this percentage from 3 million to find the total from commission:

3,000,000×0.025= $75,000

Adding these two gives us a total of $101400.

2) We can use the Simple Interest Formula to solve this (I= Prt). Plug in the values given to give us:

I= 5000(1.08)(5)

I= $27000

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