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3 years ago

Please help on these 2, giving brainly

Mathematics

2 answers:

Kamila [148]3 years ago

7 0

Answer:

82.5 for the first one,

Step-by-step explanation:

you take the base and the height for the trapezoid, multiply it together, and then for the square you take base and width for the rectangle, after you multiply you add

LiRa [457]3 years ago

6 0

Answer:

The first one would be 82.5

Step-by-step explanation:

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GIVING 100 POINTS FOR THESE 3 PROBLEMS

mart [117]

Answer:

Step-by-step explanation:

$A=\frac{a+b}{2}*h=\frac{4+7}{2}*3=16.5cm^2$

$A=\frac{ab}{2} =\frac{4*6}{2} =12in^2$

$A=wl=6*5=30in^2$

$12+30=42in^2$

$A=\frac{a+b}{2}h=\frac{28+40}{2}*30=1020ft^2$

Wall = A= $\frac{ab}{2} =\frac{6*30}{2}=90ft^2$

6 0

3 years ago

Read 2 more answers

The probability that a pharmaceutical firm will successfully develop a new drug that will return $750 million dollars is 0.14. O

algol [13]

Answer:

$E(X) = 750*0.14 -100*0.86 = 19$

So then the expected value in the long run for this case would be 19 millions

Step-by-step explanation:

Previous concepts

The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete. And is defined as:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

For $i = 1,2,....,n$

Solution to the problem

Let's define the random variable X as the expected return for a new drug.

For this case we expected a return of X=750 millions with a probability of 0.14. We assume that p is the probability of success for this case p =0.14.

And the probability of no success on this case would be q = 1-p = 1-0.14 =0.86. And the cost associated for this case would be X= -100 million

If we use the definition of expected value we have this:

$E(X) = 750*0.14 -100*0.86 = 19$

So then the expected value in the long run for this case would be 19 millions

8 0

4 years ago

Which rule explains why these triangles are congruent? (A) ASA (B) AAS (C) SAS (D) These triangles cab not be proven congruent

DerKrebs [107]

Answer:

These triangles cannot be proven congruent.

They are similar but NOT congruent.

Step-by-step explanation:

8 0

3 years ago

If 4x^2 - 100 = 0 then the roots of the equation are

iVinArrow [24]

4x² - 100 = 0
 + 100 + 100
 4x² = 100
 4 4
 x² = 25
 x = +5
4(5)² - 100 = 0
4(25) - 100 = 0
100 - 100 = 0
 0 = 0

4(-5)² - 100 = 0
4(25) - 100 = 0
 100 - 100 = 0
 0 = 0

The roots of the equation is positive or negative 5.

8 0

3 years ago

Read 2 more answers

How many triangles exist with the given angle measures 55,45,90 degrees

const2013 [10]

Answer: The correct answer is B.

The first thing to check is the sum of the angles. 32 + 51 + 97 = 180. Therefore, the sides equal 180 and we can have a triangle because all triangles have exactly 180 degrees.

Second, the number of triangles with these measures is endless. Imagine taking the initial triangle and doubling the size. The angles don't change but the triangle does. We could keep doubling the size forever.

3 0

3 years ago