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expeople1 [14]
3 years ago
11

Clara found the product of 3 – 6y2 and y2 + 2. Her work is shown below. (3 – 6y2)(y2 + 2) = 3(y2) + (–6y2)(2) = 3y2 – 12y2 = –9y

2 Is the student’s work correct?
Mathematics
1 answer:
Lilit [14]3 years ago
3 0
No he's not correct

<span>(3 – 6y2)(y2 + 2)  
= 3(y2) -6(y2)(y2)  - 6y2(2) </span>+ 3(2)<span>
= 3y2 -6y4 - 12y2 </span>+ 6 <span>
= -6y4 - 9y2 +6</span>
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lana [24]
0.5 of a mile - since 5,280ft = 1 mile and half of 5,280 is 2,640
5 0
3 years ago
Rin spends $20 every week on drum lessons.
mihalych1998 [28]

Answer:

A, B, D and F.

Step-by-step explanation:

Rin spends $20 every week on drum lessons.

If:

d = total amount of dollars Rin spends

w = number of weeks

Then: d=20w

w is the independent variable while d is the dependent variable. A change in w will lead to a change in d. Therefore:

(A)The independent variable causes a change in the  dependent variable.

(B)The equation is d = 20w.

From the equation: d=20w

When w=1, d=$20

When w=2, d=$40

When w=3, d=$60

When w=4, d=$80

This tallys with the values in Option  F.

Therefore:

(D)As the number of weeks increases, the total dollars  Rin spends increases.

The correct options are: A, B, D and F.

4 0
3 years ago
I need to Decrease 6400 by 9%
Advocard [28]

Answer:

5824

Step-by-step explanation:

10% of 6400 =640

1% 0f 6400 = 64

640-64=576

6400-576= 5824

5 0
2 years ago
A tutor works with a group of students. She charges $40 for the tutoring session plus $30 for each student in the group.
Mrac [35]
If it’s just 40 in total for the whole session , $40 + (30 x (number of students) = ?
But if it’s 40 per student as well then (40 x 30) x (number of students) = ?
4 0
3 years ago
If three pounds of bananas cost $4.50 find the cost of 10 pounds of bananas
Reika [66]

Answer:

45

Step-by-step explanation:

4.50 × 10 =45!

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4 0
2 years ago
Read 2 more answers
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