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sukhopar [10]
3 years ago
12

1. You have 23 coins, all quarters and dimes, totaling $4.85. How many of each coin do you have?

Mathematics
1 answer:
Ksju [112]3 years ago
7 0

the answer is this...

.25x+.10y=4.85

x+y=25

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Find the measure of Angle A. (include and explanation so I could do the rest on my own, preferably :)
castortr0y [4]

Answer:

13) Angle A is 30°

14) Angle A is 45°

15) Angle A is 40°

16) Angle A is 40.5°

Step-by-step explanation:

By the angle sum theorem for the interior angles of a triangle, we have;

13) 130° + 2·x + 3·x = 180°

∴ 2·x + 3·x = 180° - 130° = 50°

2·x + 3·x = 5·x = 50°

x = 50°/5 = 10°

∠A = 3·x = 3 × 10° = 30°

∠A = 30°

14) 3·x + 9 + 4·x + 9 + 78° = 180°

7·x + 18 + 78° = 180°

7·x = 180° - (18 + 78)° = 180° - 96° = 84°

x = 84°/7 = 12°

∠A = 3·x + 9 = 3 × 12° + 9 = 45°

∠A = 45°

15) 90° + x + 51 + x + 61 = 180°

∴ x + 51 + x + 61 = 180° - 90° = 90°

2·x + 112 = 90°

2·x = (90 - 112)° = -22°

x = -22°/2 = -11°

x = -11°

∠A = x + 51 = -11° + 51 = 40°

∠A = 40°

16) x + 79 + x + 49 + 70° = 180°

x + x  = (180 - 70 - 79 - 48)° = -17°

2·x = -17°

x = -17°/2 = -8.5°

x = -8.5°

∠A = x + 49 = (-8.5 + 49)° = 40.5°

∠A = 40.5°.

3 0
3 years ago
6th grade math help me pleaseeee
Helga [31]

Answer:

First one.

Step-by-step explanation:

0.3/3=0.1 ==> 0.1$ per meter

0.77/7 ==> 0.11$ per meter

The first option is cheaper, therefore better to buy if you agree with "the cheaper. the better".

4 0
2 years ago
How much greater 20 than 12?
Ber [7]
20 is 8 greater than 12. 
6 0
3 years ago
A car drove for 20 minutes at a speed of 52 how far did it travel
laiz [17]

Answer:

Oerhaps 17.3333 miles, see assumption below

Step-by-step explanation:

There are no units for 52.  52 m/sec?  52 feet/min?, 52 mph?

Once we have the units for the 52, convert the 20 minutes to the same unit as in the speed unit, hours in this case.  I'll assume miles/hour for the speed here.  So convert 20 minutes into hours:  (1 hr/60min)*(20 minutes) = (1/3) hour.

Now multiply by the 52 mph:

(52 miles/hr)*(1/3 hour) = (52/3) miles or 17.33 miles

4 0
3 years ago
Solve the absolute value eaquation
Nostrana [21]
I think the answer is x= 33, -7
4 0
3 years ago
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