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3 years ago

I need help on this

Mathematics

1 answer:

Len [333]3 years ago

5 0

What do you need help on?

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What does the "O" stand for in the S.T.O.P. method of refusal?

natima [27]

B.offer another idea hope i helped :)

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3 years ago

Dora drove 80 km in 40 minutes then 120 km in 1 hour and then the final 200km took him 1 hour 20 minutes. what is his average sp

bonufazy [111]

9514 1404 393

Answer:

133 1/3 km/hour

Step-by-step explanation:

Average speed is computed as ...

average speed = (total distance)/(total time)

= (80 km +120 km +200 km)/(2/3 + 1 + 1 1/3 hour) = 400 km/(3 hour)

= 133 1/3 km/hour

8 0

3 years ago

Factor each completely. <br><br>10a² - 9a + 2 <br><br>

Sophie [7]

Answer:

a= $\frac{2}{5}$ or $\frac{1}{2}$

Step-by-step explanation:

Equate the equation to zero

$10a^{2}$ -9a+2=0

$10a^{2}$ -5a-4a+2=0

5a(2a-1)-2(2a-1)=0

Write out the factors

(5a-2)(2a-1)=0

Then equate each factor to zero

5a-2=0 OR 2a-1=0

5a=2 OR 2a=1

a= $\frac{2}{5}$ OR a= $\frac{1}{2}$

a= $\frac{2}{5}$ or $\frac{1}{2}$

3 0

3 years ago

Kevin’s bill at a restaurant was $26.51. He left a 15% tip. About how much tip did Kevin leave?

Rzqust [24]

about $4

multiply the bill by 15% to calculate tip

tip = $26.51 × $\frac{15}{100}$ = 3.9765 ≈ $4

7 0

3 years ago

Read 2 more answers

Un carpintero quiere cortar una plancha de triple y de 1m de largo y 60 cm de ancho, en cuadrados lo más grandes posibles. El ca

Ugo [173]

Answer: $20\ cm$

Step-by-step explanation:

The first step to solve the exercise is to make the conversion from meters to centimeters.

Since $1\ m=100\ cm$ , then the dimensions of the wood board in centimeters are:

$Lenght=100\ cm\\\\Width=60\ cm$

Now, you must find the Greatest Common Factor (GCF). The steps are:

- Descompose 100 and 60 into their prime factors:

$100=2*2*5*5=2^2*5^2\\60=2*2*3*5=2^2*3*5$

- Multiply the commons with the lowest exponents:

$GCF=2^2*5\\\\GCF=4*5\\\\GCF=20$

Therefore, the side lenght of each square must be:

$s=20\ cm$

7 0

3 years ago