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tamaranim1 [39]
2 years ago
14

a motorist travelled 20km at an average speed 15km/h .if he made the return journey at an average speed of 30km/h .Find the aver

age speed of the whole journey ​
Mathematics
1 answer:
scZoUnD [109]2 years ago
8 0

Answer:

20km/h

Step-by-step explanation:

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Ed stein paid $40.00 interes tonaloan
KIM [24]

Answer:

The rate of interest paid on the principal amount is 8%.

Step-by-step explanation:

Here, Principal Amount = $2,000

Time = 3 months = (3/ 12 ) Years = 0.25 years

Rate = R

Interest Amount  = $40

Now, as we know :

Simple Interest  = \frac{P \times R \times T}{100}

⇒40  = \frac{2,000 \times R \times 0.25}{100}\\\implies R = \frac{40 \times 100}{2000 \times 0.25}   =8

or, R = 8%

Hence, the rate of interest paid is 8%.

6 0
3 years ago
Rachael is 5 ft 6 in tall . She notices that her shadow is 4 ft long and the shadow of a nearby water tower is 100 ft long . Wha
Nimfa-mama [501]
5.5/4=x/100
4x=550
x=137.5

the water tower is 137 ft. 6 in. tall.
3 0
3 years ago
Does anyone know the answer to this question?
aliya0001 [1]

Answer:

no sorry

Exanation:

5 0
2 years ago
The student council is selling cupcakes at the school play. ​The cost to ​make the cupcakes is a fixed $75 plus $0.17 per cupcak
dedylja [7]

Answer:

C = 75 + 0.17x and R = 2x

2x - (75 + 0.17x) > 0

x ≥ 41

Step-by-step explanation:

The cost to make the cupcakes is a fixed $75 plus $0.17 per cupcakes made and the selling price of each cupcake is $2.00.

Part A: Now, the equation for the cost, C, for making x cupcakes is  

C = 75 + 0.17x ......... (1)

Again the equation for the revenue, R, from selling x cupcakes is

R = 2x ............ (2)

Part B: So, the inequality that could be solved to find the number of cupcakes, x, that must be made and sold to make a profit is  

R - C > 0

2x - (75 + 0.17x) > 0 ......... (3)

Part C: Solving inequality (3) we get

(2 - 0.17)x > 75

⇒ x > 40.98

⇒ x ≥ 41 {Since, x can not be a fraction}

(Answer)

3 0
3 years ago
How many ounces are in a pounds
Ratling [72]
16 ounces are in a pound.
8 0
3 years ago
Read 2 more answers
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