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3 years ago

6+2= need help asap plzz

Mathematics

2 answers:

sergejj [24]3 years ago

5 0

Answer:

Step-by-step explanation:

NikAS [45]3 years ago

4 0

Answer:

6 + 2 = 8

Step-by-step explanation:

you could use a calculator or your fingers!

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Explain how mental math can be used to estimate a 15% tip on a taxi ride that costs $23.25 Find the tip using that method. Halp

gizmo_the_mogwai [7]

Answer:

$3.4875

Step-by-step explanation:

AS the ride is completed and according the rule the person have to give a tip on the total taxi ride

according to the given

tip given 15%

Total ride cost = $23.25

To find is the total tip given in dollars

Solution:

Total tip in dollars = 15 % of total ride cost

Putting the values of the given

Total tip in dollars = 15 % of 23.25

it can be written as

= $\frac{15*23.25}{100}$

= $\frac{348.75}{100}$

=$ 3.4875

So the total tip would be $3.4875

7 0

3 years ago

ABCD is a rhombus find the measures of <2 and <3, if m <1=22

Harrizon [31]

Angle 2 = 22 degrees (that line is dividing that angle into 1 & 2 equivalently)

Angle 3 = 90 degrees.

3 0

4 years ago

Bradley bought 14 yellow highlighters. each highlighter cost $0.94.how much did Bradley spend?

Svetradugi [14.3K]

The answer would be 13.16$

0.94x14=13.16

6 0

3 years ago

The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked

Serggg [28]

Answer:

a) The 99% confidence interval would be given by (24.409;24.979)

b) n=464

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Part a

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=47-1=46$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,46)".And we see that $t_{\alpha/2}=2.01$