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lina2011 [118]
3 years ago
11

Mark has 15 coins in dimes and quarters valuing $2.10 how many dimes does he have?

Mathematics
1 answer:
Slav-nsk [51]3 years ago
7 0
The answer is c I think
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How many solutions does the nonlinear system of equations graphed below have?
Artemon [7]
I think its 4 because the lines intersect 4 times but its been too long since ive done nonlinear equations
4 0
3 years ago
Read 2 more answers
Please help me answer
suter [353]

Answer:

The answer is indeed with Right angles

4 0
2 years ago
a port and a radar station are 2 mi apart on a straight shore running east and west. a ship leaves the port at noon traveling no
Rom4ik [11]

Answer:

The rate of change of the tracking angle is 0.05599 rad/sec

Step-by-step explanation:

Here the ship is traveling at 15 mi/hr north east and

Port to Radar station = 2 miles

Distance traveled by the ship in 30 minutes = 0.5 * 15 = 7.5 miles

Therefore the ship, port and radar makes a triangle with sides

2, 7.5 and x

The value of x is gotten from cosine rule as follows

x² = 2² + 7.5² - 2*2*7.5*cos(45) = 39.04

x = 6.25 miles

By sine rule we have

\frac{sin A}{a} = \frac{sin B}{b}

Therefore,

\frac{sin 45}{6.25} = \frac{sin \alpha }{7.5}

α = Angle between radar and ship α

∴ α = 58.052

Where we put

\frac{sin 45}{6.25} = \frac{sin \alpha }{x} to get

\frac{x}{6.25} = \frac{sin \alpha }{sin 45} and differentiate to get

\frac{\frac{dx}{dt} }{6.25} = cos\alpha\frac{\frac{d\alpha }{dt}  }{sin 45}

\frac{15sin45 }{6.25cos\alpha } =\frac{d\alpha }{dt}  }= 3.208 degrees/second = 0.05599 rad/sec.

6 0
3 years ago
A cookie company expanded its standard package of 36 cookies to include 4 extra cookies of a brand new flavor. If all of the coo
Arlecino [84]

Answer:

1/9 probability

Step-by-step explanation:

The total cookies are 36 and the new flavors are 4, if you simplify 4/36, it equals 1/9

4 0
2 years ago
SOMEONE PLEASE HELP​
-Dominant- [34]

Answer:

15c+3b=66 and 25c+5b=110

Step-by-step explanation:

5 0
3 years ago
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