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4 years ago

Match each sides and angles

Mathematics

1 answer:

Anestetic [448]4 years ago

6 0

ABC= 90 degrees

I dont really understand this one

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The mean score of the maths test is 70 with a standard deviation if 12. Calculate the z-score of a student who got 55 marks. Int

Nuetrik [128]

Answer:

Z = -1.2 ( It is below the group mean), The sudent performed less than average.

Step-by-step explanation:

From the question,

Applying

Z = (x-μ)/σ........................ Equation 1

Where Z = z-score, x = observed score or raw score, μ = mean of the score, σ = standard deviation of the score

Given: x = 55 marks, μ = 70, σ = 12

Substitute these values into equation 1

Z = (55-70)/12

Z = -15/12

Z = -1.25

Hence the z- score is negative, meaning it is below the group mean, I.e the student who get 55 marks, performed less than average

8 0

3 years ago

Which represents a side length of a square that has an area of 450 square inches?

geniusboy [140]

Answer:

21.213 inches

Step-by-step explanation:

A square area is side times side. each side is same length

square root of 450 is approx. 21.213

4 0

3 years ago

Read 2 more answers

Solve the equation for y. 2y=8

saul85 [17]

Answer:

four

Step-by-step explanation:

2(4)=8

8 0

4 years ago

Answer both questions please

ollegr [7]

He first answer is: <1 and <4 <2 and <3
I can’t see all of question 2

8 0

4 years ago

A bride and groom both invited guests to their wedding. The bride invited twice as many women as the groom did, and the groom in

n200080 [17]

Answer:

option 1) 50

Step-by-step explanation:

Let m and w denote the men and women respectively.

From the question, if the groom invited w number of women, then bride invited 2w number of women.

Also, if the bride invited m number of men,then the groom invited 2m.

Hence we can write the following maths equation:

w+2m=105.........1

2w+m=135.........2

We multiply eqn(1) by 2 to get eqn(3)

This implies that,

2w+4m=210.......3

We then subtract eqn (2) from eqn(3) to obtain;

3m=75

we divide through by 3

$\implies \frac{3m}{3} = 75$

$\implies m= 25$

Substituting the value of m into eqn (1)

to find the value for w

$\implies w + 50 = 105$

subtracting 50 from both sides.

$\implies w + 50 - 50= 105 - 50$

$\implies w+2(25)=105$

$\implies w= 55$

So we can say the :

bride invited 25 men and 110 women,

groom invited 50 men and 55 women.

6 0

4 years ago