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valina [46]
2 years ago
14

Can you help me to find the answer

Mathematics
2 answers:
LekaFEV [45]2 years ago
7 0
Since he used the 'product of powers' property, he has to use multiplication. Also, the commutative property is only for addition and multiplication. So, the answer is C.
const2013 [10]2 years ago
4 0
He simplified expression C because that is the only one that has only multiplications.
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Steve had 7 more than twice as many quarters as dimes. if the total value of her coins was $10.15, how many of each kind of coin
NemiM [27]
X=quarters, y=dimes
7+2x=y
0.25x+0.1y=10.15
we substitute the first equation into the second equation
0.25x+0.1(7+2x)=10.15
0.25x+0.7+0.2x=10.15
0.45x+0.7-0.7=10.15-0.7
0.45x=9.45
0.45x/0.45=9.45/0.45
x=21 quarters
7+2x=y, x=21
7+2(21)=y
7+42=y
y=49 dimes
check: 0.25x+0.1y=10.15 when x=21, y=49
21(0.25)=5.25 in quarters
49(0.1)=4.90 in dimes 
5.25+4.90=10.15
3 0
3 years ago
Which of the following could be the ratio between the lengths of the two legs
weqwewe [10]
30:60:90
3:6:9
1:2:3
I can’t make sense of given answers
6 0
3 years ago
1. A right triangle is shown.
Free_Kalibri [48]

Answer:

24 is the answer

Step-by-step explanation:

answer is 24 for base

7 0
2 years ago
Determine the unit rate of a marathon runner who travels 9/2 miles in 3/4 hour.
ludmilkaskok [199]

Answer:

The marathon runner runs 1 mile every 10 minutes.

Step-by-step explanation:

9/2 miles is equal to 4.5 miles. 3/4 hours is equal to 45 minutes.

8 0
3 years ago
Figure I and Figure II are similar figures,
ELEN [110]

The ratio of corresponding sides is same for all the sides for similar polygon. the correct proportion is,

\frac{ST}{EF}=\frac{WR}{CD}

Thus the option H is the correct option.

To find the correct proportion we need to know about the properties of slimier polygon.

<h3>What are the properties of similar polygon?</h3>

Two polygons are said to be similar or congruent pentagon-

The corresponding angle of two pentagons are congruent.

The ratio of corresponding sides is same for all the sides.

The figure given in the problem of similar two polygons with six sides.

Rearrange the second figure as shown in figure.

As for the similar polygons, the ratio of corresponding sides is same for all the sides.

Thus the sides shown in the two rearranged figure must be same. Therefore,

\frac{ST}{EF}=\frac{WR}{CD}

Hence the correct proportion is,

\frac{ST}{EF}=\frac{WR}{CD}

Thus the option H is the correct option.

Learn more about the similar polygon here;

brainly.com/question/771807

8 0
1 year ago
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