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3 years ago

What’s the answer? For this question is hard

Mathematics

1 answer:

zvonat [6]3 years ago

6 0

Answer:

D. $53.76.

Step-by-step explanation:

20% = 0.20 as a decimal.

Price before Sales Tax = 64 - 0.20*64

= $51.20

Adding 5% sales tax we get

52.20 + 0.05*51.20

= $53.76 (answer).

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Mrs. Myles gave the same test to both her first and third period class. In first period, the median was 75 and the range was 30.

dolphi86 [110]

<span>D) There is not enough information to know if any of these is true.</span>

7 0

3 years ago

What is the greatest common factor of 18 and 54?

Shtirlitz [24]

Answer:

Step-by-step explanation:

18=2×3×3

54=2×3×3×3

gcd=2×3×3=18

3 0

2 years ago

(3/4)3 write as improper fraction and mixed number

matrenka [14]

15/4, 3 3/4, and 3.75

5 0

3 years ago

(5n2 – 4nm - 9m²) + (7n2 + 4nm +8m²) =

Flauer [41]

Answer:

$\left(5n^2-4nm-9m^2\right)+\left(7n^2+4nm+8m^2\right)=12n^2-m^2$

Step-by-step explanation:

Given the expression

$\left(5n^2\:-\:4nm\:-\:9m^2\right)\:+\:\left(7n^2\:+\:4nm\:+8m^2\right)$

Remove parentheses: (a) = a

$=5n^2-4nm-9m^2+7n^2+4nm+8m^2$

Group like terms

$=5n^2+7n^2-4nm+4nm-9m^2+8m^2$

Add similar elements: $5n^2+7n^2=12n^2$

$=12n^2-4nm+4nm-9m^2+8m^2$

Add similar elements: $-4nm+4nm=0$

$=12n^2-9m^2+8m^2$

Add similar elements: $-9m^2+8m^2=-m^2$

$=12n^2-m^2$

Therefore, we conclude that:

$\left(5n^2-4nm-9m^2\right)+\left(7n^2+4nm+8m^2\right)=12n^2-m^2$

5 0

3 years ago

Which of the following scenarios could be represented by the expression

wolverine [178]

Answer:

Step-by-step explanation:

I am going with A......12x + 7y....x = # of adult and y = # of children.....adults cost 12 and children cost 7 <====

B doesn't make much sense....u could say x was for girls and y for boys...but u already know how many there are....so I am not sure what the x and y could stand for.

C does't make much sense either....x would have to be red marbles and y would have to be green marbles...but just like B, u already know how many there are....so not sure what x and y could stand for

D. wrong....because the box containing x 7 oz packages and y 12 oz packages.....12x + 7y....for this one to be correct, it would have to have x 12 oz packages and y 7 oz packages

7 0

3 years ago