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asambeis [7]
3 years ago
15

Which equation can be used to determine what number, n, is 40% of 64?

Mathematics
1 answer:
11111nata11111 [884]3 years ago
3 0
Of means multiply, so it would be 40% x 64
40% is equivalent to 0.40, so you would use the equation 
C. 0.40(64) = n
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Jimmy ran at a speed of m miles. how far did he run in t minutes
beks73 [17]

Answer:

(mxt) miles

Step-by-step explanation:

speed = m \: miles \: per \:minute \\ time \:  = t \: minutes \\ speed =  \frac{distance}{time}  \\ m =  \frac{d}{t}  \\ m \times t \:  = d \\ d = (m \times t)miles

hope that this is helpful.

8 0
3 years ago
10x + 7y = -3 <br> 5x - y = 3
rodikova [14]
If this is a system of equations then:
Multiply 5x-y=3 by -2
=> -10x+2y=-6
Now you sum the equations:
10x-10x+7y+2y=-3-6
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Then just divide by 9: y=-1
Now to get x, choose one of the equations and use the value we got from y:
5x-(-1)=3 => 5x+1=3 => 5x=3-1
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(x,y)=(2/5, -1)
5 0
3 years ago
The summer income of the 3,408 students at Centennial High School last year was
Olin [163]

You want to find

P(1000 < X < 3000)

where X is normally distributed with mean 1751 and standard deviation 421. Transform X to Z, so that it follows the standard normal distribution with mean 0 and standard deviation 1 using the relation

X = 1751 + 421Z   ==>   Z = (X - 1751)/421

Then

P(1000 < X < 3000) = P((1000 - 1751)/421 < (X - 1751)/421 < (3000 - 1751)/421)

… ≈ P(-1.783 < Z < 2.967)

… ≈ P(Z < 2.967) - P(Z < -1.783)

… ≈ 0.9985 - 0.0373

… ≈ 0.9612

so that approximately 96.1% of the students fall in this income range.

6 0
3 years ago
Population density is the number of people per unit of area. The population density of a certain region is 60 people per square
zvonat [6]

Answer: 1380

<u>Step-by-step explanation:</u>

\dfrac{60\ people}{km^2}\times 23\ km^2\quad =1380\ people

7 0
4 years ago
Read 2 more answers
A city worker is marking the outside edges of a football feild. the feild is 120 yards long and 53 yards wide how many yards wil
Mazyrski [523]
346 is the answer.120+120=240 50+50=100 3+3=6
5 0
4 years ago
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