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vova2212 [387]
3 years ago
7

3/5+9/10 =-1/5-23/10

Mathematics
1 answer:
Mamont248 [21]3 years ago
7 0
1.5 = -2.5
this is incorrect it’s not a true statement
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Simplify the expression show all your work 18 / 2 x 3 over 5 - 2
11Alexandr11 [23.1K]

Answer:

18÷2 × 3 / 5-2

9 ×3 / 3

27/3

9

tyvm this was my 100th answer :)

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3 years ago
Find the surface area of the equilateral triangular pyramid.
Tanzania [10]
C is the correct answer



good luck
8 0
3 years ago
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Suppose you can somehow choose two people at random who took the SAT in 2014. A reminder that scores were Normally distributed w
Sindrei [870]

Answer:

22.29% probability that both of them scored above a 1520

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 = 1497, \sigma = 322

The first step to solve the question is find the probability that a student has of scoring above 1520, which is 1 subtracted by the pvalue of Z when X = 1520.

So

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

Z = \frac{1520 - 1497}{322}

Z = 0.07

Z = 0.07 has a pvalue of 0.5279

1 - 0.5279 = 0.4721

Each students has a 0.4721 probability of scoring above 1520.

What is the probability that both of them scored above a 1520?

Each students has a 0.4721 probability of scoring above 1520. So

P = 0.4721*0.4721 = 0.2229

22.29% probability that both of them scored above a 1520

8 0
2 years ago
Can i please get your help , it will mean a lot if you actually do and luvya so for helping genuinely :)
Art [367]

Answer:29

Step-by-step explanation:

Opposite angles in a quadrilateral (the trapezium inside the circle) must add up to 180, so 180-92 = 88.

So DAB = 88

Angles on a straight line add up to 180, so to find t, you have to 180 - 88 - 63 =  29

So t is 29.

Hope that helps!

8 0
3 years ago
What is 2/5 as a percentage?
Naya [18.7K]
The answer is 40% i hope u do well
7 0
3 years ago
Read 2 more answers
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