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2 years ago

Help me lol (please)

Mathematics

2 answers:

IrinaK [193]2 years ago

7 0

Answer:Sure thing? But first what do you need help with? And just maybe I will help you with whatever you need help with?

Step-by-step explanation:

Jlenok [28]2 years ago

6 0

Answer:

team A won because they finished the races with the least amount of time

Step-by-step explanation:

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Brainly use a matrix to find the solution to the system of equations -8x-8y=-16 6x-9y=-108

Mama L [17]

We want to use a matrix to solve
-8x - 8y = -16
6x - 9y = -108

Before solving, simplify the equations as follows:
Divide the first equation by -8 to obtain
x + y = 2 (1)
Divide the second equation by 3 to obtain
2x - 3y = -36 (2)

In matrix form, the equations are
$\begin{bmatrix}1&1\\2&-3\end{bmatrix} \begin{\bmatrix} x\\y\end{bmatrix}=\begin{bmatrix}2 \\ -36 \end{bmatrix}$

The determinant of the matrix is
D = (1)(-3) - (1)(2) = -5

Use Cramer's Rule.
$x = \frac{1}{D} det(\begin{bmatrix}2&1\\-36&-3 \end{bmatrix} ) = \frac{1}{-5} (-6+36) = -6$
Similalrly,
$y= \frac{1}{-5} det(\begin{bmatrix} 1&2\\2&-36\end{bmatrix} ) = \frac{1}{-5}(-36-4) =8$

Answer: (-6, 8) or x = -6, y = 8

8 0

3 years ago

15$ is what percent of 240$

miskamm [114]

15/240=0.0625=6.25%
Just divide the part by the whole

5 0

3 years ago

How do solve:

snow_tiger [21]

Answer:

-1

Step-by-step explanation:

-6(-2)= -6*-2= 12

4(-3)= 4*-3= -12

12/-12= -1

5 0

3 years ago

Read 2 more answers

Mike and John are the partners in a local bar who invest in a ratio of 7:13, respectively. They started the business with $1.5M.

Mamont248 [21]

Answer:

A) $525,000

B) $975,000

C) 35%

Step-by-step explanation:

To solve A) and B), divide the total amount of money by the sum of the parts of the ratio (7 + 13 = 20, in this case), and then multiply this by the person's portion of the ratio. This is because you are finding the worth of '1 part', and are then multiplying it to find how much money all their parts are worth together.

To solve C), take a person's portion of the ratio, divide it by the sum of the portions of the ratio and then multiply by 100% to get a percentage. In this case, 7/(7 + 13) * 100% = 7/20 * 100% = 0.35 * 100% = 35%.

7 0

3 years ago

Answer<br> (5.2 + 6.3) - 12 ÷ 2.5

sweet [91]

Answer:

-0.2

Step-by-step explanation:

5.2 + 6.3 = 11.5

11.5 - 12 / 2.5

-0.5 / 2.5

= -0.2

5 0

3 years ago

Read 2 more answers