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Rzqust [24]
3 years ago
8

The scores on a test have a mean of 78 and a standard deviation of 6.5. A student scored a 67 on the test. What is the Z-Score a

ssociated with this score?
Mathematics
1 answer:
Komok [63]3 years ago
5 0

Answer:

76

Step-by-step explanation:

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2 EASY QUESTIONS HELP
Leona [35]

Answer:

a) 5/8

b)6/7

Step-by-step explanation:

3 0
3 years ago
What is the perimeter of a parallelogram, if it's area is 36 cm^2 and the distances between the point of intersection of the dia
IgorC [24]

Answer:

The perimeter of a parallelogram is 30cm.

Step-by-step explanation:

From the question , the given area of a parallelogram is 36 cm².

But the area of a parallelogram can be calculated using below formula

Area = base * height

From the question the distances that exist between the point of intersection of the diagonals and the sides are 2cm and 3cm respectively

There is the same distance between point of intersection of the diagonals and the opposite sides then,

The base of the side with 4cm can be calculated as

ha= 2+ 2= 4cm

But area can be calculated as A= base × height

36= b1 × h1

36=b1 × 4

b1= 9cm

The base of the other side can be calculated with 6cm height

h2= 3+3=6cm

A= b2× h2

36= b2 ×h2

36= b2× 6

b2= 6cm

Then the perimeter of the parallelogram can be calculated as

P= 2(b1 + b2)

= 2(6+9)

= 30cm

Hence,the perimeter of the parallelogram is 30cm

4 0
3 years ago
2/3 of a plot is garden.1/5 of the garden is lawn find the fraction of the plot of land that is lawn
Marina CMI [18]

Answer:

2/3 + 1/5 = 13/15

Step-by-step explanation:

5 0
3 years ago
Horizontal lines are __________ perpendicular to vertical lines. question 10 options:
LenKa [72]
A. Always
These lines<span> are </span>perpendicular<span> since their slopes are negative reciprocals.</span>
7 0
3 years ago
(5ab-4a-6)-(4ab-1) find the sum please fast
jekas [21]

We need to get rid of expression parentheses.

If there is a negative sign in front of it,

each term within the expression changes sign.

Otherwise, the expression remains unchanged.

Numerical 'like' terms will be added. There is only one group of like terms

the answer is: ab-4a-5 

<span />
7 0
3 years ago
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