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lawyer [7]
3 years ago
12

Standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 21.2 and the standard deviation

was 5.7 The test scores of four students selected at random are 15,23,7 and 35 . Find the​ z-scores that correspond to each value and determine whether any of the values are unusual.
The​ z-score for 15 is
Mathematics
1 answer:
alina1380 [7]3 years ago
8 0
32’s 21 savages lil raw jhit only
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Write the correct inequality for each graph.
Arada [10]

1.) x>2

2.)x≤3

3.)x<4

4.)x≥5

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7 0
3 years ago
Volleyball Village sells pairs of volleyball kneepads in black and white. Last month, they sold 5 pairs of black kneepads for ev
pshichka [43]

Answer:

2250

Step-by-step explanation:

5 x 2 = 10

225 x 10 = 2250

8 0
3 years ago
Solve by substitution.<br> x + 3y = -2<br> 1-3x + y = 6
aalyn [17]
Explanation:
3
x
+
y
=
2
−
x
−
3
y
=
6
⇒
−
6
−
3
y
=
x
Substitute this equation into the other system wherever you see
x
.
3
(
−
6
−
3
y
)
+
y
=
6
Distribute
3
onto
(
−
6
−
3
y
)
−
18
−
9
y
+
y
=
2
Combine alike terms
−
8
y
=
20
Divide to solve for
y
−
8
y
−
8
=
20
−
8
⇒
y
=
−
20
8
Then solve for
x
using the value of
y
.
−
x
−
60
8
=
6
x
=
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108
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3 0
3 years ago
Please help me, I’ll give brainliest
kolbaska11 [484]

Answer:

<em>x</em><em> </em><em>=</em><em> </em><em>4</em><em>5</em>

<em>y</em><em> </em><em>=</em><em> </em><em>5</em>

Step-by-step explanation:

<em>it</em><em> </em><em>is</em><em> </em><em>b</em><em>ecause</em>

<em>9</em><em>0</em><em>/</em><em>2</em><em> </em><em>=</em><em> </em><em>4</em><em>5</em>

<em>(</em><em>9</em><em>0</em><em>+</em><em>1</em><em>0</em><em>)</em><em>/</em><em>2</em><em>0</em><em> </em>

<em>(</em><em>1</em><em>0</em><em>0</em><em>)</em><em>/</em><em>2</em><em>0</em><em> </em><em>=</em><em> </em><em>,</em><em>5</em>

7 0
4 years ago
The number of checkers is 24 times the number of checkboards what is the equation
Verdich [7]
Let x= the number of checkerboards
let y = the number of checkers

there are 24 times more checker than checkerboards so

24x = y
6 0
3 years ago
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