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MrRa [10]
2 years ago
5

Roberto made a 74 on last week's math quiz. This week he made an 85 on

Mathematics
1 answer:
FinnZ [79.3K]2 years ago
6 0

Answer:

His quiz score increased by about 7%.

Step-by-step explanation:

Take the two quiz scores and add them together to get 159.

Take the difference between the two quiz scores to get 11.

Divide the difference by the sum to get 0.0692 or about 7%.

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Simplify each expression
katrin2010 [14]

Answer:

{x}^{ \frac{1}{2} }  \times  {x}^{ \frac{2}{3} }

{x}^{ \frac{3 + 4}{6} }

{x}^{ \frac{7}{6} }

6 0
2 years ago
How many times larger is 9 x 10^9 than 3 x 10^-4?
andrezito [222]
The larger value is 9 x 10^9
The smaller value is 3 x 10^(-4)

Divide the larger over the smaller
Doing so will have you divide the coefficients 9 and 3 (numbers in front of the "times ten to the..." portions) to get 9/3 = 3. 
Then you'll also subtract the exponents: 9 minus (-4) = 9 - (-4) = 9 + 4 = 13

In summary so far, we got a coefficient of 3 and an exponent of 13

So the final answer is 3 x 10^13 (assuming you want scientific notation)

If you want to convert to standard notation, instead of scientific notation, move the decimal point in 3.0 thirteen spots to the right to get 

30,000,000,000,000

there are 13 zeros (four groups of 3 plus one just after the 3) in that value above. This is the number 30 trillion
8 0
3 years ago
How do I find the scale factor of a dilation?
kobusy [5.1K]
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7 0
3 years ago
Karissa says that to represent the expression - 7 - (- 9) on number line, she should start at 7 and move units to the IN correct
Sholpan [36]

Answer:

No

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Should stop at 2

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3 years ago
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