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Nataliya [291]
2 years ago
12

An old car has to travel a 2-mile route, uphill and down. Because it is so old, the car can climb the first mile, the ascent, no

faster than an average speed of 15 mi/h. How fast does the car have to travel the second mile, on the descent, to achieve an average speed of 30 mi/h for the trip
Mathematics
1 answer:
Molodets [167]2 years ago
3 0

Answer:

2s + 30 = 2s

Step-by-step explanation:

Time up hill + time down hill = total time

:

Multiply equation by 30s; results

2s + 30 = 2s

:

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HELP someone please!!!! i dont understand
ad-work [718]

Answer:

x = 65.03°

Step-by-step explanation:

To solve for x, we have to apply trigonometric ratio.

Recall: SOH CAH TOA

From the diagram, we know the following:

Reference angle = x

Hypotenuse = 45

Adjacent = 19

Since we know the Hyp and Adj, we would apply CAH, which is:

Cos x = Adj/Hyp

Plug in the values

cos(x) = \frac{19}{45}

x = cos^{-}(\frac{19}{45})

x = 65.0250346°

x = 65.03° (nearest hundredth)

4 0
2 years ago
A cleaning product sells for $0.75 a quart. Which equation can be used to solve for the total cost, C , of five gallons of the p
ozzi

Answer: b. C = 5 × ($0.75 × 4)

Step-by-step explanation:

Note that 4 quarts = 1 gallon

Therefore, if a cleaning product sells for $0.75 a quart, the equation can be used to solve for the total cost, C , of five gallons of the product will be:

= 5 × ($0.75 × 4)

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8 0
2 years ago
PLEASE HELP!!<br> Name the solution to this system of equations:
RoseWind [281]

9514 1404 393

Answer:

  (x, y) = (3, -1)

Step-by-step explanation:

The solution to the system of equations is the point where the lines intersect.

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3 0
3 years ago
14:6=28:18<br><br> 42:7=6:2<br><br> 2:3=3:2<br><br> 3:5=12:20
SIZIF [17.4K]
Answer is <span>3:5=12:20

3x4 = 12
5x4 = 20

so 
</span><span>3:5=12:20</span>
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What is the slope of this ​
Sveta_85 [38]

Answer:

Step-by-step explanation:

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y= (0,-3)

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2 years ago
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