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topjm [15]
3 years ago
5

On a family trip, natalie counted 3 groups of 5 motocycles and additonal 7 solo motocycles. write an expression for the number o

f motocycles natalie saw.then find the number of motocycles
Mathematics
2 answers:
FrozenT [24]3 years ago
6 0
3 x 5{15}+7=22 the answer is 22

timama [110]3 years ago
4 0
3×5=× would be the answer
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A person recently read that 84% of cat owners are women. How large a sample should the researcher take if she wishes to be 90% c
Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q  }{E^2}

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of  (1 - confidence level)/2.  Use the calculator function of invNorm to find the z-score.  The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p.  For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333

Round up to the next number, giving you 405.

6 0
3 years ago
Which image is a reflection of the orange letter K in Quadrant I?
stellarik [79]

Answer: Quadrant 4

Step-by-step explanation:

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6 0
1 year ago
What is the y-Intercept for the equation 4x -3y= -18?
jeka57 [31]
D.) the answer is d.
7 0
3 years ago
89 POINTS!!! You are given an isosceles trapezoid ABCD with median XY. Complete the following.
Sauron [17]

Answer:

(Given m∠DCB = 105, m∠DAB = 75) m∠ADC=75, m∠AXY=105, m∠DYX=105, m∠BXY=75, m∠CYX=75, m∠ABC=105

Step-by-step explanation:

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3 years ago
When is it best to review your notes
sergey [27]

As soon as possible after the lecture

5 0
3 years ago
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