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NikAS [45]
3 years ago
7

△ABC is similar to △DEF . AB=5 inches, BC=9 inches, and DE=7.5 inches. What is EF ?

Mathematics
2 answers:
MrRissso [65]3 years ago
8 0
I think the answer is 13.5. △DEF is 1.5 times bigger than <span>△ABC</span>
Vikki [24]3 years ago
4 0
Similar triangles have corresponding sides with proportional lengths.

AB/BC = DE/EF

5/9 = 7.5/EF

5(EF) = 9 * 7.5

5(EF) = 67.5

EF = 13.5
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alexandr402 [8]
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5 0
3 years ago
The tunnel of fear ride climbs straight up to its peak 50 meters above the ground. Then, it drops 65 meters into an underground
Maurinko [17]

Answer:

-15 meters

Step-by-step explanation:

The tunnel of fear starts at 0 meters, goes up to 50 meters, then drops 65 meters. This expressed as an equation is:

(0+50)-65=x

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8 0
3 years ago
Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x overbarequals100.
LenaWriter [7]

Answer:

\hat y = -3.34+ 1.07(91) = 94.03

Step-by-step explanation:

Data given

n=20 represent the sampel size

\bar X = 100.39 represent the sample mean for the independent variable (IQ score of the husband)

\bar y = 103.6 represent the sample mean for the dependent variable.

r =0.925 represent the correlation coefficient

Solution to the problem

The general expression for a linear model is given by:

y = \beta_0 + \beta_1 x

Where \beta_0 is the intercept and \beta_1 the slope

For this case we have a linear model given by the following expression:

\hat y = -3.34 +1.07 x

Where -3.34 is the intercept and 1.07 the slope. In order to find the best predicted value when X = 91 we just need to replace into the equation the value of 91 and we got this:

\hat y = -3.34+ 1.07(91) = 94.03

On this case is the best predicted value because E(\hat y) = y we have an unbiased estimator.

8 0
2 years ago
Jenny and Julie each drank a cup of hot chocolate after playing in the snow. Jenny put 6 more marshmallows in her cup than Julie
Paladinen [302]
Well it would make sense that Jenny had 6 marshmallows and Julie did not put any in, Hope this helped a little
5 0
2 years ago
Read 2 more answers
Which fraction is less than 5/8<br> A. 3/4<br> B. 11/16<br> C. 13/16<br> D. 2/4
Lisa [10]

Answer:

D) 2/4

Step-by-step explanation:

2/4 is equivalent to 4/8 which is less than 5/8

5 0
2 years ago
Read 2 more answers
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