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3 years ago

He system of equations can be solved using linear combination to eliminate one of the variables.

Mathematics

2 answers:

Ne4ueva [31]3 years ago

7 0

Answer is 13x=39
Just took a test and it was right!

Sindrei [870]3 years ago

7 0

the answer is D 13x = 39

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A bag contains 4 blue marbles, 6 red marbles, 3 yellow marbles, and 5 black marbles. What is the probability that you choose two

Ronch [10]

Answer:

.065

Step-by-step explanation:

The total number of marbles is

4 blue marbles+ 6 red marbles+ 3 yellow marbles+5 black marbles=18

P(1st black) = Black/total = 5/18

You keep the marble

The total number of marbles is

4 blue marbles+ 6 red marbles+ 3 yellow marbles+4 black marbles=17

P(2st black) = Black/total = 4/17

Multiply the probabilities together

P(black,black)= 5/18 * 4/17 =10/153=.065359477 =.065

4 0

3 years ago

Please help, see attachment

Black_prince [1.1K]

Answer:

The length of DB is 8

Step-by-step explanation:

I know it doesn't look EXACTLY like the one in the diagram but I just followed the measurements provided

4 0

3 years ago

A repair bill for your car is $553. The parts cost $265. The labor cost is $48 per hour. Write and solve an equation to find the

Lilit [14]

Answer:

6 hours

Step-by-step explanation:

Let the labor hours be x.

The bill comprises of parts cost plus labor cost. Labor cost is hours times the cost per hour. Then we have equation:

265 + 48x = 553
48x = 553 - 265
48x = 288
x = 288/48
x= 6

So the answer is 6 hours.

4 0

3 years ago

Find the annual interest rate.<br> REMEMBER TO SHOW WORK!!<br><br> I = $41.80, P = $440, t = 2 years

den301095 [7]

Divide the interest by the time, then divide that number by the principal. you should get an answer that is 0.0475. or 4.75%

7 0

3 years ago

Show that 0.357 is a rational number.

nika2105 [10]

Answer:

$0.357 = (357)/(1000)$ .

Step-by-step explanation:

A number is a rational number if and only if it is equal to the ratio between two integers. In other words, a number $x$ is a rational number if and only if there are integers (whole numbers) $p$ and $q$ ( $q \ne 0$ ) such that $x = p / q$ .

Thus, the $0.357$ in this question would be a rational number as long as there are integers $p$ and $q$ ( $q \ne 0$ ) such that $p / q = 0.357$ . Simply finding the right $p\!$ and $q\1$ would be sufficient for showing that $0.357\!$ is rational.

Since $0.357$ is a terminating decimal, one possible way to find $p\!$ and $q\1$ is to repeatedly multiply $0.357\!$ by $10$ until a whole number is reached: