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3 years ago

21. Solve the expression below: -4X – (-13). if x = 4

2 answers:

6 0

The answer would be -3 because if you multiply -4 and 4 that is -16 and then you would subtract -16 and -13 which is equal to 3

nexus9112 [7]3 years ago

3 0

-4X – (-13). if x = 4

Plug in x = 4:

-16x + 13.

Note: Can't solve an expression.

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The area of this rectangle is 96 ft2.<br> What is the length and width?

chubhunter [2.5K]

Answer:

length is 8

width is 12

Step-by-step explanation:

the equation to solve this would be

x*(x+4)=96

you isolate the variable by dividing each side by factors that doesn't contain the variable

X would then equal 8

length is 8

width is 8+4= 12

5 0

3 years ago

A shipment of 50 precision parts including 4 that are defective is sent to an assembly plant. The quality control division selec

natali 33 [55]

Answer:

0.3968 = 39.68% probability this shipment passes inspection.

Step-by-step explanation:

The parts are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

50 parts means that $N = 50$

4 defective means that $k = 4$

10 are chosen, which means that $n = 10$

What is the probability this shipment passes inspection?

Probability that none is defective, so:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 0) = h(0,50,10,4) = \frac{C_{4,0}*C_{46,10}}{C_{50,10}} = 0.3968$

0.3968 = 39.68% probability this shipment passes inspection.

6 0

3 years ago

If angle A = 34°, angle B = (x-5)°, angle C = 4y °, what is the value of y?

nevsk [136]

180-34=146
146-5=141
ratio=1:4
1+4=5
141÷5=28.2
x=28.2
y=112.8

I may be wrong, ask for more opinions
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4 0

3 years ago

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Every point on the perpendicular bisector of a segment is?

lisov135 [29]

Its equally distant from the endpoints of the segment to find the center of the following rotation

8 0

4 years ago

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Simplify 6m plus 2m minus 5

mr Goodwill [35]

Answer:

8m-5

Step-by-step explanation:

Lets write this out in an equation.The plus means addition and the minus means subtraction.

6m+2m-5

Since there is two things with the same variable we can combine them.

8m-5

That is as simple as it gets.

6 0

3 years ago

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