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d1i1m1o1n [39]
2 years ago
12

A Spanish test has 30 questions. A student answers 80% correctly.

Mathematics
1 answer:
ad-work [718]2 years ago
6 0

Answer:

24

Step-by-step explanation:

Lets start by working out 80% of 30

80% x 30=24

so the student answered 24 questions correctly

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At a speed of 22 revolutions per minute, how long will it take a wheel of radius 10,
Bogdan [553]
Well, if the radius is 10, then the circumference is \frac{2*10*22}7=\frac{440}7
What's the unit? Either way, 22 rev. per minute means each minute you go by 22*\frac{440}7=\frac{9680}7 units per second. Now you got the linear speed, just find out the time by dividing the distance by the speed!
So, what's the unit for the radius?
5 0
3 years ago
The equation 3y=5x represents a proportional relationship. what is the constant of proportionality for this relationship
Citrus2011 [14]

The constant of proportionality for this relationship is  \frac{5}{3}

Step-by-step explanation:

Proportional relationship is the relation between two variables that vary directly with each other

  • If x and y are proportion, then y = k x, where k is the constant of proportionality
  • If x and y are proportion, then \frac{y}{x}=k, where k is the constant of proportionality

∵ The equation is 3 y = 5 x

∵ x and y are proportional

- That means y = k x, where k is the constant of proportionality

∴ Put the equation in the form y = k x

- Divide both side by the coefficient of y

∵ The coefficient of y is 3

∴ Divide both sides of the equation by 3

∴ y = \frac{5}{3} x

-  The value \frac{5}{3}  is constant

∴ k =  \frac{5}{3}

∵ k represents the constant of proportionality

∴ The constant of proportionality =  \frac{5}{3}

The constant of proportionality for this relationship is  \frac{5}{3}

Learn more:

You can learn more about the proportional relationship in brainly.com/question/10708697

#LearnwithBrainly

4 0
3 years ago
If I have 18 credits and need 23 to graduate high school how many semesters do I need to take? one or two???
sammy [17]

Depending on what classes, most likely one.

7 0
3 years ago
What is the slope intercept form of 6x + 2y = 24?
dsp73
6x + 2y = 24....subtract 6x from both sides
2y = -6x + 24...now divide both sides by 2
y = -6/2x + 24/2...now reduce
y = -3x + 12 <=== slope intercept form of y = mx + b
7 0
3 years ago
The mean of 100 numerical observations is 51.28 what is the value of the sum of all 100 numbers
zlopas [31]
\dfrac{x_1+x_2+\cdots+x_{99}+x_{100}}{100}=51.28

which means the sum of the 100 numbers must be

x_1+x_2+\cdots+x_{99}+x_{100}=100\times51.28=5128
8 0
2 years ago
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