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Dmitry_Shevchenko [17]
4 years ago
5

Can someone help me with number 4?

Mathematics
1 answer:
mestny [16]4 years ago
3 0
You have to say how diagrams and equations help to figure out ratio and rate problems, you have to figure it on your own, there really isnt an exact answer
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Maria brought $50 to spend on rides at the
Stels [109]
She has paid for 11 rides.

She started with 50 dollars and at the end she has 6 dollars left. Each ride costs 4 dollars. The follow equation could be created:

$6 = $50 - $4r

Six dollars remaining = original fifty dollars - four dollars per ride.

The number of rides is represented by the variable r.

To solve:

$6 = $50 - $4r
Subtract 50 from both sides

-$44 = -$4r.
Divide each side by -4 to get the number of rides (r)

11 = r

Therefore, she has paid for 11 rides.

4 0
3 years ago
1 over 4a = 2 over 3. Which of the following equals a in this equation? 1 over 6 3 over 8 11 over 12 22 over 3
Elis [28]

Answer:

Option B, 3 over 8

Step-by-step explanation:

<u>Step 1:  Make an equation</u>

1/4 * 3/2 = a

3/8 = a

Answer:  Option B, 3 over 8

4 0
4 years ago
Find the value c that completes the square for x^2-8x+c
Blababa [14]

Answer: 16

Step-by-step explanation:

x^2-8x+c

Let's complete the square.

c=(\frac{b}{2})^2

c=(\frac{-8}{2})^2

c=(-4)^2\\ c=16

7 0
3 years ago
4. Which of the following describes a proportional relationship?
Papessa [141]

Answer:

G. Heather rented a hotel for $110 a night plus $18 a night for valet parking

Step-by-step explanation:

A proportional relationship is one that has a constant ratio between two variables

y/x = Constant

From the given options, the one with a proportional relationship is option G.

The amount at which Heather rented a hotel = $110

The amount he pays for valet parking = $18

The total amount Heather pays a night = $110 + $18 = $128

The amount she pays for 2 nights = 2 × $128 = $256

Therefore, we have;

\begin{array}{cc}x&y\\1&128\\2&256\\3&384\end{array}

From which we get;

y/x = 128/1 = 256/2 = 128 = Constant.

5 0
3 years ago
a truck traveled 60 km per hour the first hour, 45 miles per hour as the next 30 minutes and 50 km per hour in next 45 minutes w
-BARSIC- [3]
Answer: 
134 kilometers or 83 miles.

Explanation: 
First make all the units equivalent, so 
60 km/h = 60 km/h or 37.28 m/h
45 m/h = 72.42 km/h or 45 m/h
50 km/h = 50 km/h or 31.07 
So in one hour the car has gone 60 km or 37.28 m because they travel at 60km/h, which means they get that far in that amount of time. 
In half an hour they get half of 45 miles, because 45 m/h means they get 45 miles in 60 minutes, so in 30 minutes, or half and hour, they are getting half of 45 = 22.5 miles or 36.21 kilometers. 
In 45 minutes they are getting 75% of 50 km because 45 minutes is 75% of an hour. So 75% of 50 is 37.5 km or 23.3 miles. 

Add this all together and get:
Kilometers:
60 + 36.21 + 37.5 = 133.71 km
Miles:
37.28 + 22.5 + 23.3 = 83.08 m 
133.71 km = 83.08 So it checks out.
This is approximately 134 km or 83 miles.
4 0
3 years ago
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