MATHEMATICS HIGH SCHOOL

-2x+5y=-15 5x+2y=-6 how many solutions does this system have

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

-2x + 5y = -15

5x + 2y = -6

-10x + 25y = -75

10x + 10y = -30

35y = -105

y = -3

5x + 2(-3) = -6

5x - 6 = -6

5x = 0

x = 0

(0, -3)

one solution

Answer 2

Answer:

Answer:

one solution

Step-by-step explanation:

took the test

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What 3different ways to make 115 using hundreds, tens, and ones blocks?

Answers

Hundreds tens ones
1. 1 1 5
2. 0 11 5
3. 0 0 115

Final answer:

There are three different ways to make 115 using hundreds, tens, and ones blocks: using 1 hundred, 1 ten, and 5 ones; using 1 hundred, 11 tens, and 0 ones; using 2 hundreds, 0 tens, and 15 ones.

Explanation:

There are three different ways to make 115 using hundreds, tens, and ones blocks:

Using 1 hundred, 1 ten, and 5 ones: This is represented as 100 + 10 + 5 = 115.
Using 1 hundred, 11 tens, and 0 ones: This is represented as 100 + 110 + 0 = 115.
Using 2 hundreds, 0 tens, and 15 ones: This is represented as 200 + 0 + 15 = 115.

Learn more about Ways to make 115 with hundreds, tens, and ones blocks here:

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Jina reads 30 chapters of a book in 6 hours. What is her rate in chapters per hour?

Answers

Answer:

providing structure, regulating cell processes and creating movement. Proteins are large molecules consisting of one or more polypeptide chains. They perform many important functions in the body such as: Structural base: they are the building blocks of the cell.

Step-by-step explanation:

The standard normal curve shown below models the population distribution of a random variable. What proportion of the values in the population does not lie between the two z-scores indicated on the diagram?z=-1.25
z=0.80

Answers

Answer:

0.3175

Step-by-step explanation:

z=-1.25 from table is .1056

z=.80 from table is .7881

subtract from each other =.6825

Subtract from the whole is 1-.6825=0.3175

Sketch one cycle of the sine curve. y = -3 sin 4theta

Answers

Answer:

Step-by-step explanation:

We have been given a function:

$y=-3sin4\theta$

We will compare it with the genral equation which is:

$y=asin bx+c$

Where, a is amplitude and period of function is $(2\pi)/(b)$

In given equation a is -3 and b is 4

So, period of the given equation is:

$(2\pi)/(4)=(\pi)/(2)$

Yo can look at the graph in the attachment.

The a is the amplitude and the period of the function is $(2\pi )/(b)$

We have been given a function

$y = -3 sin 4 \theta$

What is the general form of sin wave?

$y=asinbx+c$

We will compare it with the general equation which is

Where a is amplitude and period of the function is $(2\pi )/(b)$

In the given equation a is -3 and b is 4

So, the period of the given equation is:

$(2\pi )/(4) =(\pi )/(2)$

You can look at the graph.

To learn more about the sin wave visit:

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1. Conduct a hypothesis test for the following scenario. SHOW ALL YOUR WORK THE WAY WE DID IN CLASS! Construction zones on highways have a much lower speed limit. To see if drivers obey these lower speed limits, a police officer uses a radar gun to measure the speed in miles per hour of a random sample of 10 drivers in a 30 mph speed zone. Here are the data: 26 28 32 21 27 31 29 22 25 34 Is there convincing evidence at the α = .05 level that the average speed is below the speed limit?

Answers

First you want to put the numbers in order 21,22,25,26,27,28,29,31,32,35

Then separate the ones above the limit from below the limit

Above-31,32,35 (a total of 3)

Below-21,22,25,26,27,28,29 (a total of 7)

.5 is equal is 1/2 and over half are below the speed limit

So the average speed is most likely below the speed level

P.S. the average speed is 24.4

What annual simple interest rate will increase Jacob Davidson’s initial investment of $5,000 to $6,000 in two years?multiple choice
A)10%

B)5%

C)4%

D)6%