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Rasek [7]
3 years ago
7

HURRY I'LL PICK A BRAINLIEST PERSON!!!

Mathematics
2 answers:
Maurinko [17]3 years ago
7 0
Density = mass/volume
D = m/v
v*d = m
v = m/d
m/d = v

The final answer is choice C
Delicious77 [7]3 years ago
5 0
I'm pretty sure the answer is C. m/d = V. Mass divided by volume equals density.
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15 points for someone who can answer & explain this to me thanks
iris [78.8K]

Answer:

see explanation

Step-by-step explanation:

Given

\frac{9}{a^2+9a+20} , \frac{7a}{a^2+11a+28}

Factor the denominators of both fractions

\frac{9}{(a+4)(a+5)} , \frac{7a}{(a+4)(a+7)}

The lowest common denominator of both fractions is (a + 4)(a + 5)(a + 7)

Multiply numerator/denominator of first fraction by (a + 7)

Multiply numerator/denominator of second fraction by (a + 5 )

\frac{9(a+7)}{(a+4)(a+5)(a+7)} , \frac{7a(a+5)}{(a+4)(a+5)(a+7)} , then

\frac{9a+63}{(a+4)(a+5)(a+7)} , \frac{7a^2+35a}{(a+4)(a+5)(a+7)}

8 0
2 years ago
Ellie borrows money at a year simple rate of 6 1/2% after 4 years ellie owes 39 interest
kupik [55]

Answer: Ellie borrowed $150.

Step-by-step explanation:

I = PRT

39 = P x 0.065 x 4

39 = P x 0.26

Divide both sides by 0.26

150 = P

6 0
2 years ago
Ally ran 5 miles in 6 minutes. Sami ran 6 mile. If ally ran at a faster rate than Sami ,in how many minutes could Sami have run
Veseljchak [2.6K]
Answer:6 minutes
(not really sure that is what i got)
8 0
3 years ago
Read 2 more answers
The school chorus has 52 students which represents 26% of the seventh graders. How many students are in the seventh grade
barxatty [35]

Answer:

There are 200 students in the seventh grade.

Step-by-step explanation:

For equations like these, you have to use the is/of formula, which is:

Percent/100 = is/of.

Since you are trying to find how many students are in the seventh grade, this means that 52 <u><em>is</em></u> 26% of the total amount of students in the seventh grade. So, the formula would look like so:

26/100 = 52/n.

Next, you have to cross multiply, which means you would multiply 26 by n, and 52 by 100.

Then, you are going to have this left over from the cross multiplying:

5200 = 26n.

Divide 26 on both sides, leaving you with:

1n = 200, or n = 200.


8 0
3 years ago
2b^2+4b–2=0 what is the answer?
s2008m [1.1K]
2b^2+4b-2=0\\&#10;2(b^2+2b-1)=0\\&#10;2(b^2+2b+1-2)=0\\&#10;2((b+1)^2-2)=0\\&#10;2(b+1)^2-4=0\\\&#10;2(b+1)^2=4\\\&#10;(b+1)^2=2\\&#10;b+1=-\sqrt2 \vee b+1=\sqrt2\\&#10;b=-1-\sqrt2 \vee b=-1+\sqrt2&#10;&#10;
5 0
3 years ago
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