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Masteriza [31]
3 years ago
13

In a school there are 1500 boys and

Mathematics
1 answer:
maw [93]3 years ago
7 0

Answer:

Step-by-step explanation:

If there are 1500 total students.

75% or 1125 are boys

25% or 375 are girls.

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10) -6x + 8y = 0<br> -3x + 4y = 2<br><br> Infinite solution or no solution
Reptile [31]
No solution bc if u multiply the bottom equation by -2, it makes 6x-8y=-4. This caused the x and y to eliminate, leaving 0=2.
7 0
3 years ago
The point V(-2,-1) is reflected over the y-axis. What are the coordinates of the resulting point, V’?
krok68 [10]

Answer:

(2,-1)

Step-by-step explanation:

i think it's that.

4 0
3 years ago
An oblong measures 15 cm by 8 cm. find the angle between its diagonal and a longer edge answer
kramer
For this case you can model the problem as a rectangle triangle where you have the length of the opposite leg and the adjacent leg.
 Therefore, the angle sought is given by:
 theta = Atan (8/15)
 theta = 28.07 degrees
 Answer: 
 The angle between its diagonal and a longer edge is: 
 theta = 28.07 degrees
8 0
4 years ago
Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles have a shell length greater
jeka57 [31]

Answer:

a. 0.1917

b. 0.0914

d. 0.1580

Step-by-step explanation:

(a)

 P^D = \frac{15}{40} = 0.375

 P^E = \frac{11}{60} =0.8133

Mean, \sigma_{P^D-P^E} = P^D-P^E = 0.375 -0.1833 = 0.1917

(b) sample prop ? Show your work and label each value.

Mean,   =  = 0.1917

Standard deviation = \sqrt{\frac{P^D(1-P^D)}{N_D} +\frac{P^E(1-P^E)}{N_E} }

Standard deviation =  \sqrt{\frac{0.375(1-0.375)}{40} +\frac{0.1833(1 - 0.1833)}{60} }

Standard deviation = 0.0914

(c)

Normality condition:

np ≥ 10 and n(1-p) ≥ 10

Both the samples satisfy the normality condition.

(d)

The probability is obtained by calculating the z score,

z = \frac{(P^D-P^E)-(P^d-P^e)}{\sigma_{P^D - P^E}}

z = \frac{0.1917-0.1}{0.0914} = 1.0029

P(z > 1.0029) = 1 - P(z ≤ 1.0029)

The probability is obtained from the z distribution table,

P(Z > 1.0029) = 1 - 0.8420 = 0.1580

3 0
3 years ago
Which statements are true about opposites?
olga_2 [115]

Answer:

A and D.

Step-by-step explanation:

Two integers are opposites if they are each the same distance away from 0, but on opposite sides of the number line. For example, 6 and -6 are opposites.

Given a number line of the real number system, the following are true about opposites.

A) opposites are numbers located on opposite sides of 0 on a line number.

For example: -1 and 1 are opposite in which -1 is located to the left of 0 and 1 is located to the right of zero.

(D)Opposites are the same distance from 0 on a number line.

The distance of opposites from 0 on the number line is the same. This is as a result of the fact that the distance from zero is irrespective of the sign.

|-3|=|3|=3

The correct options are A and D.

3 0
3 years ago
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