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faltersainse [42]
3 years ago
15

You drive your car for three hours at an average speed of 130 km/h how far did you go

Mathematics
2 answers:
aliina [53]3 years ago
8 0
About 390 km because you drive 130 km per hour so 130 times 3 is 390
ValentinkaMS [17]3 years ago
4 0

Answer:

390 KM

Step-by-step explanation:

Every 130 kilometers, an hour passes by. This means, that if you drive for 3 hours, you must multiply those 130 kilometers by 3.

130*3=<u>390</u>

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What is the store paid $75 for a clarinet and sold it for $100 did the store mark up the price by 30% what the answer
nevsk [136]

Answer:

Mark up  = 33.33%

Step-by-step explanation:

Given that:

buying price = $75

selling price = $100

First we will find the difference between two prices:

Difference = 100 - 75 = $25

We will find now that 25 is what percent of 75 so:

=25/75* 100

=  0.333333 * 100

= 33.33%

So the store marked the price by 33.33% instead of 30%

i hope it will help you!

3 0
3 years ago
Consider an urn containing 8 white balls, 7 red balls and 5 black balls.
weqwewe [10]

Answer + Step-by-step explanation:

1) The probability of getting 2 white balls is equal to:

=\frac{8}{20} \times \frac{7}{19}\\\\= 0.147368421053

2) the probability of getting 2 white balls is equal to:

=C^{2}_{5}\times (\frac{8}{20} \times \frac{7}{19}) \times (\frac{12}{18} \times \frac{11}{17} \times \frac{10}{16})\\=0.397316821465

3) The probability of getting at least 72 white balls is:

=C^{72}_{150}\times \left( \frac{8}{20} \right)^{72}  \times \left( \frac{7}{20} \right)^{78}  +C^{73}_{150}\times \left( \frac{8}{20} \right)^{73}  \times \left( \frac{7}{20} \right)^{77}  + \cdots +C^{149}_{150}\times \left( \frac{8}{20} \right)^{149}  \times \left( \frac{7}{20} \right)^{1}  +\left( \frac{8}{20} \right)^{150}

=\sum^{150}_{k=72} [C^{k}_{150}\times  \left( \frac{8}{15} \right)^{k}  \times \left( \frac{7}{15} \right)^{150-k}]

5 0
1 year ago
Read 2 more answers
Help plz due in 20 min
ipn [44]

Answer:

3\sqrt{7}

Step-by-step explanation:

×\sqrt{63} = \sqrt{9times7} \\\sqrt{9} = 3\\3\sqrt{7}

4 0
3 years ago
Read 2 more answers
Four times a number, subtracted from nine, is twice the number. How do I solved this?
Natalija [7]

4x - 9 = 2x


Solve for x.

4x = 2x + 9

2x = 9

x = 4.5

We can plug 4.5 into the original equation to verify if it's correct.

4x - 9 = 2x

4(4.5) - 9 = 2(4.5)

18 - 9 = 9

The equation is true, and so x = 4.5

5 0
3 years ago
6.4=0.8m solve for m
jeyben [28]
6.4 = 0.8m
/0.8    /0.8
    8 = m
4 0
3 years ago
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