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Olin [163]
3 years ago
11

Which expression has a value that is equivalent to 5n+13 when n= -15

Mathematics
2 answers:
photoshop1234 [79]3 years ago
7 0
Which expression has a value that is equivalent to 5n+13 when n=-15 
4n+8
Rasek [7]3 years ago
6 0
Which expression has a value that is equivalent to 5n+13 when n=-15? n^2+13x 








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To mix plaster for a dental model, 45 milliliters (mL) of water are used for 100 grams (g) of plaster. How many milliliters (mL)
Tomtit [17]
\begin{array}{ccc}45\ ml&-&100\ g\\\\x\ ml&-&250\ g\end{array}\ \ \ |cross\ multiply\\\\\\100\cdot x=45\cdot250\\\\100x=11,250\ \ \ |divide\ both\ sides\ by\ 100\\\\\huge\boxed{x=1,125\ (ml)}
6 0
3 years ago
Angel invests money in an account paying simple interest. He invests $110 and no money is added or removed from the investment.
Elena-2011 [213]

Answer:

82.8

Step-by-step explanation:

4 0
2 years ago
The head of the Westlane Cultural Center wants to get a sense of how quickly pledges from donors arrive at the center. It takes
Rzqust [24]

Answer:

95.64% probability that pledges are received within 40 days

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 = 28, \sigma = 7

What is the probability that pledges are received within 40 days

This is the pvalue of Z when X = 40. So

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

Z = \frac{40 - 28}{7}

Z = 1.71

Z = 1.71 has a pvalue of 0.9564

95.64% probability that pledges are received within 40 days

7 0
3 years ago
George and Cameron went on a bycicle trip. They took a bus to their starting point, and then biked the rest. They traveled 325 k
pashok25 [27]

Answer:

Step-by-step explanation:

Let the distance travelled by bus be x and the distance travelled be bike be (x+75)

Finally

x + (x+75) = 325

2x = 250

x= 125

5 0
3 years ago
Use trigonometry to find the missing side. Round your answer to the nearest tenth (one decimal place)
Alchen [17]

Given:

A figure of a right triangle.

To find:

The missing side by using the trigonometric ratios.

Solution:

In a right angle triangle,

\cos \theta=\dfrac{Adjacent}{Hypotenuse}

In triangle ABC,

\cos A=\dfrac{AC}{AB}

\cos (31^\circ)=\dfrac{b}{270}

0.857=\dfrac{b}{270}

Multiply both sides by 270.

0.857\times 270=b

231.39=b

b\approx 231.4

Therefore, the missing side length is b=231.4 inches.

5 0
3 years ago
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