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3 years ago

I need help please i am so bad at math

Mathematics

1 answer:

Citrus2011 [14]3 years ago

5 0

Answer:

Um I might be able to help depending on what type of math it is.

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Emma calculated the slope of the downhill hike to be -1/40 her work is shown below determine whether her calculation was correct

Monica [59]

The calculation is incorrect, because the slope is defined as

$m_{AB} = \dfrac{y_A-y_B}{x_A-x_B}$

So, Emma has inverted numerator and denominator: she has calculated the inverse of the slope.

The correct calculation would be

$\dfrac{300-900}{180-165} = \dfrac{-600}{15} = -40$

4 0

3 years ago

Y=4x and 3x+y=-21. Substitute

gizmo_the_mogwai [7]

value of x= -3 and value of y = -12

Solution set is (-3,-12)

Step-by-step explanation:

We need to solve the system of equations using substitution

The system of equations are:

$y=4x\\3x+y=-21$

Solving:

Let

$y=4x\,\,eq(1)\\3x+y=-21\,\,eq(2)$

Solving:

Putting value of y from equation 1 into equation 2

$3x+y=-21\\3x+4x=-21\\7x=-21\\x=-21/7\\x=-3$

So, value of x = -3

Now, putting value of x into equation 1 and find value of y

$y=4x\\y=4(-3)\\y=-12$

Value of y = -12

So, value of x= -3 and value of y = -12

Solution set is (-3,-12)

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

5 0

3 years ago

15 POINTS) Conducting a survey best fits which step of the statistical process?

ICE Princess25 [194]

Answer:

B. Design and implement a plan that collects data.

Step-by-step explanation:

because you're implementing the plan by gathering data

Hope I helped :)

8 0

2 years ago

Which would you simplify in order to evaluate the expression when the value of the variable is 2?

Tpy6a [65]

Answer:

Happy to help!

6 0

3 years ago

Read 2 more answers

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-response question.

weqwewe [10]

Answer:

8(15-m)

Step-by-step explanation:

By looking at the options, we can understand that the right one is 8(15-m), since we need to multiply the time by the number of question.

Also, we can check that result by arranging an equations usint the total time.

55 = 3m - 8(15-m)

55 = 3m - 120 + 8m

55 = 11m - 120

55 + 120 = 11m

175 = 11m

m = 175/11 = 15.91

55 = 3*15.91 - 8(15-15.91) = 47.73 - 120 + 127.28 = 55.01 ≈ 55

6 0

2 years ago