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maw [93]
3 years ago
7

1/5+20.3 - (-5 3/5)= 11/12 - (-10) -5/6=

Mathematics
1 answer:
rodikova [14]3 years ago
8 0
1.) 26.1
2.) 10.08 or 10.083(repeating)
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The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,200.
Svetllana [295]

Answer:

14110

Step-by-step explanation:

Let x = number of pages ;

μ = 12200 ; σ = 820

Zscore = (x - μ) / s

Zscore = (x - 12200) / 820

Zcritical at 99% confidence, for a 1 - tail test is 2.33

Hence, Z at 99% = 2.33

Put Zscore = 2.33

Zscore = (x - 12200) / 820

2.33 = (x - 12200) / 820

2.33 * 820 = x - 12200

1910.6 = x - 12200

1910.6 + 12200 = x

x = 14110.6

x = 14111

The number of pages the manufacturer should advertise is 14,110

5 0
3 years ago
Whole numbers greater than 10 but less than 15​
Liono4ka [1.6K]

A whole number greater then 10 but less then 15 would be 12

3 0
3 years ago
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Sixty is 20 percent more than what number?
blsea [12.9K]

Answer:The answer is 48

Step-by-step explanation:

4 0
3 years ago
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How do I find the y coordinates of the vertex of a parabola?
Bess [88]

Answer:

My example:

1. Get the equation in the form y = ax4 + bx + c

2. Calculate -b / 4a. This is the x coordinate of the vertex

3. To find the y coordinate of the vertex, simply plug the value -b / 4a into the equation for x and solve for y.

Step-by-step explanation:

y=2x^2 -16x +30

vertex: ( 4, -2)

Focus: (4, -15/8)

Axis of symmetry: x = 4

Directrix: y = -17/8

6 0
3 years ago
Za and Zb are complementary angles. Za measures 55°.<br> What is the measure of Zb?
Over [174]

Answer:

15

Step-by-step explanation:

hope this helps!

6 0
3 years ago
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