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Mars2501 [29]
3 years ago
11

Consider the following system of equations.

Mathematics
1 answer:
Dmitrij [34]3 years ago
6 0

Answer:

C. When the equations -10x + 5y = -60 and -3x − 5y = -5 are added together, a third linear equation, -13x = -65, is formed, and it shares a common solution with the original equations.

Step-by-step explanation:

2x-y=12

-3x-5y=-5

multiply the first equation by -5

-10x +5y = -60

add the 2 equations together

-3x-5y=-5

-10x +5y = -60

-------------------------

-13x = -65

We use the addition property of equality which says adding the same thing to both sides, doesn't change the equation, so we will get the same answer as the original equation

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The diagram below shows the rectangle PLUM.
Illusion [34]

Answer:

Area of rectangle PLUM = 75.00 square units

Step-by-step explanation:

Since diagonal of rectangle divides the rectangle into two equal triangles,

Therefore, area of the rectangle PLUM = 2× area of triangle PLM

By the mean proportional theorem,

In ΔPLM,

AP² = AM × AL

6² = AM × 8

AM = \frac{36}{8}

AM = 4.5 units

Area of PLM = \frac{1}{2}(\text{Base})(\text{height})

                     = \frac{1}{2}(ML)(AP)

                     = \frac{1}{2}(8 + 4.5)(6)

                     = 12.5 × 3

                     = 37.5 units²

Now area of rectangle PLUM = 2×37.5 = 75 units²

Therefore, area of the rectangle is 75.00 square units.

3 0
3 years ago
Can you explain to me (detailed) on how to do this problem? I will give you a brainly if you get this right.
Pepsi [2]

Answer:

9 cm

Step-by-step explanation:

The formula to find the area of a square is Base times height (B x H)

Since a square has equal sides, it means each side is 3 centimeters.

So, all you have to do is 3 times 3.

3 x 3=9

<u>Final answer</u>

9 cm

4 0
4 years ago
Read 2 more answers
A mother wants to invest $5,000.00 for her son's future education. She invests a portion of the money in a bank certificate of d
Lostsunrise [7]
Let us say, the CD amount she invested is "c"
and  the amount she invested in the savings bond is "s"

she invested a total of 5,000
so, whatever "c" is and "s" is, c + s = 5,000

now, the CD account earned 4% in interest
4% in decimal form is 4/100 or 0.04

she also earns 7% from the saving bonds,
7/100 is 0.07

the interest earned after one year are 300
that is, the 4% per year and the 7% per year add up to 300 bucks
so, one can say that

0.04c + 0.07s = 300

\begin{cases}&#10;c+s=5,000\to s=\boxed{5,000-c}&#10;\\ \quad \\&#10;0.04c+0.07s=300\to 0.04c+0.07(\boxed{5,000-c})=300&#10;\end{cases}&#10;\\ \quad \\&#10;\textit{solve for "c", or CD amount}
8 0
3 years ago
Read 2 more answers
(3 points) In Illinois, 9% of all drivers arrested for DUI (Driving Under the Influence) are repeat offenders; that is, they hav
den301095 [7]

Answer:

22.60% probability that exactly 3 people are repeat offenders

Step-by-step explanation:

For each driver arrested selected, there are only two possible outcomes. Either they are repeat offenders, or they are not. The probability of an arrested driver being a repeat offender is independent from other arrested drivers. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which 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)!}

And p is the probability of X happening.

In Illinois, 9% of all drivers arrested for DUI (Driving Under the Influence) are repeat offenders;

This means that p = 0.09

Suppose 28 people arrested for DUI in Illinois are selected at random.

This means that n = 28

a) What is the probability that exactly 3 people are repeat offenders

This is P(X = 3)

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{28,3}.(0.91)^{25}.(0.09)^{3} = 0.2260

22.60% probability that exactly 3 people are repeat offenders

4 0
3 years ago
I need help in Kahn academy
Alex17521 [72]

Please post your question.

4 0
3 years ago
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