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Sloan [31]
3 years ago
14

Simplify equation -4a + 16a

Mathematics
1 answer:
Zepler [3.9K]3 years ago
6 0

Answer:12a

Step-by-step explanation:

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Carl ran around the track 3 more times than Daria and 2 fewer times than Erin. When they were done they added up the number of l
Paul [167]

Answer:

Total laps = 10d

Step-by-step explanation:

Let c = Carl's laps

d = Daria's laps

e = Erin's laps

c = 3d

c = e/2

c + d + e = totals laps

We can insert 3d in place of c in the third equation

3d + d + e = total laps

Also, e/2 equals 3d

e/2 = 3d

Multiply both sides by 2

(e/2 = 3d)2

e = 6d

Insert the new e

3d + d + 6d = 10d = totals laps

3 0
2 years ago
The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4 or 11.25. What is the common ratio i
kati45 [8]
\bf \begin{array}{ccll}
n&term&value\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
2&a_2&20\\
3&a_3&20r\\
4&a_4&20rr\\
&&20r^2\\\\
&&\frac{45}{4}
\end{array}\implies \stackrel{4^{th}~term}{20r^2=\cfrac{45}{4}}\implies r^2=\cfrac{45}{80}
\\\\\\
r^2=\stackrel{simplified}{\cfrac{9}{16}}\implies r=\sqrt{\cfrac{9}{16}}\implies r=\cfrac{\sqrt{9}}{\sqrt{16}}\implies r=\cfrac{3}{4} 
4 0
3 years ago
Please help me with Part B! I've already answered Part A.
Lostsunrise [7]

When we multiply our servings by a given amount, we're not multiplying our cost of cake by the same amount. This tells us that this is not proportional. One way to think about proportional relationships, we already said, that the ratio between the variables will be equivalent.

4 0
2 years ago
At a bake sale for every 8 cupcakes sold you eat $5.00. If you made $45, how many cupcakes did you sell?
gogolik [260]

8 cupcakes are sold for $5.00 if you made $45.00 then let's devide 45/5=9

6 0
3 years ago
Read 2 more answers
How do you find the missing angles of a triangle when you have all the sides?
Paraphin [41]
Well one way is to decide if its a right triangle, if so the right angle will always be 90 degrees
4 0
3 years ago
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