2 years ago

Factor 2x2 + 6x – 108.

Mathematics

1 answer:

oksian1 [2.3K]2 years ago

6 0

Answer:

in this question option ç is correct

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A musician has just purchased a theremin — an instrument that can be played by moving your hands in the air. For every 30 centim

Kobotan [32]

Answer:

1665 hertz

Step-by-step explanation:

30 x 3.33 = 1 (1 meter) so 500 x 3.33 = 1665 (1 meter of movement)

8 0

2 years ago

Solve each equation. Check your solution.

solniwko [45]

Converting all to improper fractions
31/10s = 31/5
5×31s=31×10
155s = 310
s=310/155= 2

20/9=-4/5m
5×20=-4×9m
100=-36m
m=100/-36 = 72 28/36 = 72 7/9

-14/5=-7/2n
-14×2=5×-7n
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n =-28/-35
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3 years ago

A software developer wants to know how many new computer games people buy each year. Assume a previous study found the standard

Marrrta [24]

Answer:

The minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence is n=567.

Step-by-step explanation:

We have to calculate the minimum sample size n needed to have a margin of error below 0.14.

The critical value of z for a 95% confidence interval is z=1.96.

To do that, we use the margin of error formula in function of n:

$MOE=\dfrac{z\cdot \sigma}{\sqrt{n}}\\\\\\n=\left(\dfrac{z\cdot \sigma}{MOE}\right)^2=\left(\dfrac{1.96\cdot 1.7}{0.14}\right)^2=(23.8)^2=566.42\approx 567$

The minimum sample size to have this margin of error is n = 567.

3 0

2 years ago

If 20 divided by 5 = 4 <br> Then 20 divided by 5.5=4.?

ahrayia [7]

Answer:

Step-by-step explanation:

20 divided by 5.5 is a decimal 3.63

3 0

3 years ago

the surface area of a prism is 208 cm2. two of the dimensions are 2 cm and 10 cm. find the measure of the other dimensions

Nataliya [291]

10.4 mutiply 10 and 2 then divide 208/20

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2 years ago