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mixer [17]
3 years ago
11

Janice drove 392 miles in 7 hours. What is the average number of miles she drove per hour?

Mathematics
1 answer:
amm18123 years ago
5 0

Answer:

Step-by-step explanation:

Total Distance = 392 miles

Total Time = 7 hours

Average Miles / hour = 392 miles / 7 hours

Average Miles / hour = 56 miles per hour

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The regression equation y equals negative 0.414 x plus 106.55 approximates the percent of people in an audience who finish watch
wolverine [178]

Answer:

  (b)  71%

Step-by-step explanation:

Put the given value of x in the formula and do the arithmetic.

  -0.414(85) +106.55 = -35.19 +106.55 = 71.36

About 71% of the audience will finish watching the film.

4 0
2 years ago
What is the measure of angle Q to the nearest whole degree?<br> 43°<br> 49°<br> 53°<br> 58°
geniusboy [140]

Answer:

m∠Q ≈ 53°

Step-by-step explanation:

To find the measure of ∠Q, the law of cosines will need to be used. Lowercase letters represent the side lengths, while upper case letters represent angles.

In this situation, 'A' will be ∠Q. Therefore:

17² = 18² + 20² -2(18)(20)cosQ

Simplify:

289 = 324 + 400 -2(360)cosQ

Continue simplifying down:

-435 = -720cosQ

Divide both sides by '-720':

0.604 = cosQ

cos^{-1}Q = 0.604

m∠Q ≈ 52.83 or 53° rounded to the nearest whole degree.

3 0
3 years ago
Benjamin has enough icing to cover a 12-square-foot cake.
bazaltina [42]

Answer:

The area of each of the 2 equal-sized cakes shall behalf of 12 ft²: 12 ft² / 2 = 6 ft²

Step-by-step explanation:

5 0
3 years ago
What is ninety nine percent of two hundred?
Yuri [45]
200 x 0.99. Or you can do 200/100 which is 2. then multiply that by 99 which gets you 99 which is 198.
4 0
3 years ago
Read 2 more answers
Consider firing a pumpkin from a canon at a target that is 17 meters away. The pumpkin follows a quadratic path as displayed to
bixtya [17]
A.
(0,00
(2.6,7.9)
(4.8,12.4)
(9.7,15.1)

b.
well, the points don't look like they are on the line but they actually are (plot twist)


so
since (0,0) is on th egarph

0=a(0)²+b(0)+c
0=c
so
f(x)=ax²+bx+0 or
f(x)=ax²+bx

find a and b
sub points

(2.6,7.9)
7.9=a(2.6)²+b(2.6)
7.9=6.76a+2.6b

(4.8,12.4)
12.4=a(4.8)²+b(4.8)
12.4=23.04a+4.8b

use those 2 equations
7.9=6.76a+2.6b
12.4=23.04a+4.8b

eliminate b
multiply first equation by -4.8 and 2nd by 2.6 and add them
-37.92=-32.448a-12.48b
32.24=59.904a-12.48b +
-5.68=27.456a+0b

-5.68=27.456a
divide both sides by 27.456
(-5.68/27.456)=a
find b

12.4=23.04a+4.8b
12.4=(-130.8672/27.456)+4.8b
12.4+(130.8672/27.456)=4.8b
(12.4+(130.8672/27.456))/4.8=b

da equation is
y= \frac{-5.68}{27.456} x^2+ \frac{12.4+\frac{130.8672}{27.456}}{4.8}x



c. the roots are found with your calculator
the roots are at x=0 and x=17.287323943662
so very close to the target but not exactly on it
if the target has a radius of 0.287323943662 or more then it will hit the target
5 0
3 years ago
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