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skad [1K]
3 years ago
13

If Denise and Alex add a 15% tip after the tax is applied, what is the total cost, including tip?

Mathematics
1 answer:
Murljashka [212]3 years ago
4 0
What’s the cost before the tip? We need to know that before calculating the cost with the tip.
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Find the difference.<br> 8 - 4 = 1
Anvisha [2.4K]

Eight minus four equals four!

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3 years ago
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Determine the x-intercept, y-intercept and slope of the line described by - 3x + 7y = –21 (Which is not proper Standard Form bec
inessss [21]

Slope = 3/7

y - intercept: y = -3

x - intercept x = 7

6 0
3 years ago
"In the diagram, m = 128° and m = 76°. What is mABC?
wel
Angle ABC is an inscribed angle.

Inscribed angle = 1/2 * Intercepted Arc

The intercepted arc is arc CD + arc DA, which would be 128 + 76 = 204

m<ABC = 1/2(204)

m<ABC = 102 degrees

You answer is D) 102
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3 years ago
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According to the College Board website, the scores on the math part of the SAT (SAT-M) in a recent year had a mean of 507 and st
Leviafan [203]

Answer:

The actual SAT-M score marking the 98th percentile is 735.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 507, \sigma = 111

Find the actual SAT-M score marking the 98th percentile

This is X when Z has a pvalue of 0.98. So it is X when Z = 2.054. So

Z = \frac{X - \mu}{\sigma}

2.054 = \frac{X - 507}{111}

X - 507 = 2.054*111

X = 735

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3 years ago
A convenience store sells two brands of orange juice. bran a contains 8 fluld ounces and costs $1.28. brand b contains 12 fluld
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The 12 fluid ounces is cheaper
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