Question

Check my Algebra answers please, :)
Simplify the expression: 16 ÷ 8 • 2.
A.4
B.32
C.1
D.16
[I think A]

Simplify the expression: [(18-6)x3+1] x 7
A.43
B.259
C.7
D.336
[I think B]

Evaluate the expression if a = 1 and b = 4.
\[\frac{ 2(a+6b) }{ ab }\]
A.12.5
B.14
C.6.5
D.8
[I think A]

Translate the word of phrase into a variable expression. The product of a number and 5 is decreased by 2.
A.\[\frac{ n }{ 5}-2\]
B.\[2-\frac{ n }{ 5 }\]
C. 2 – 5n
D. 5n – 2
[I think its A]

(ran out of room, The last question is below;

Answer 1

Write a variable expression that represents the word problem. Gisele gave d dimes and n nickles to her brother. Which expression represents the amount in dollars that Gisele gave to her brother?

A. (0.10 + 0.05) • nd
B. 0.10d + 0.05n
C. d • n
D. d + n
[I think its B]

Answer 2

Your first and third ones look correct.
The second question doesn't even have the correct responses, lemme show you:\[\Large\rm [(18-6)-3+1] \times 7\]\[\Large\rm [(12)-3+1] \times 7\]\[\Large\rm [9+1] \times 7\]\[\Large\rm [10] \times 7\]\[\Large\rm 70\]

Answer 3

The product of a number and 5 is decreased by 2.
So you've got the subtraction correct, you're subtracting 2 from something.
But you're subtracting 2 from a `product`, not from a quotient`.
So 5 should be multiplying n.

Answer 4

5th question looks correct.

Answer 5

Wait I have more :( sorry

Which expression completes this equation?
10 • 2 + 15 ÷ 3 = ?

A. 10 • 17 ÷ 3
B. 35 – [6 + (3 – 1)]
C. 5 • [(7 – 3) + 1]
D. 9 • 2 + 1 – 3
[I think C]

Which value of x makes the open sentence true?
7 – x = 3x + 5

A. x = 1.5
B. x = 3
C. x = 0.5
D. x = 2
[I think C]

Which equation represents this situation? Charlie worked 1.5 hours less than Dirk. Together, they worked a total of 25 hours. Dirk worked h hours.

A. h – 1.5 = 25
B. h + (h + 1.5) = 25
C. h – 2.5 = 25
D. h + (h – 1.5) = 25
[I think D]

Nia wants to place grouping symbols in the expression 35 ÷ 7 – 5 + 4 so that it has a value of 21.5. Which shows the correct placing of the grouping symbols?

A. (35 ÷ 7) – 5 + 4
B. 35 ÷ 7 – (5 + 4)
C. 35 ÷ (7 – 5) + 4
D. 35 ÷ (7 – 5 + 4)
[I think C]
Thank you so much for the help =)

Answer 6

10 • 2 + 15 ÷ 3 = 25
Ok good job, option C seems to be giving 25 as well.

7 – x = 3x + 5
x=1/2, good.

`h` + `(h – 1.5)` = `25`
`Dirk's hours` + `Charlie's Hours` = `Total Hours`.
Ok good on this one also.

C. 35 ÷ (7 – 5) + 4
Yes good job! :)

Answer 7

I messed up on question 2 :( , I accidentally made it "-3" instead of "x3" sorry

Answer 8

\[\Large\rm [(18-6)\times3+1] \times 7\]\[\Large\rm [(12)\times3+1] \times 7\]\[\Large\rm [36+1] \times 7\]\[\Large\rm [37] \times 7\]\[\Large\rm 259\]Ok great! Your answer looks there.

Answer 9

yeah, thanks you soo much =D

Answer 10

c: