I need help with this story problem.. 8th Grade Chapter 9.3 Linear Functions:

I don't understand this plz help explain how to do it

podryga [215]

Answer:

1. U. 190

2.U. 155

3. U. 240

Step-by-step explanation:

Explanation: To find an angle of a triangle we add the angles we know about

EXAMPLE: 50 + 120. We need to find the third angle.

We know that Angles of triangles should add up to 360

So to find the third angle we add the angle we know about.

EXAMPLE: 50 + 120 = 170 then we Subtract the sum of a triangle *360*

EXAMPLE: 50 + 120 = 170

EXAMPLE: 170 - 360

EXAMPLE: = 190

That's how we find a third angle!

If this doesn't clarify how do to it enough just let me know and i can try to explain more in detail!

Hope this helps you!!!

Have a nice day!

6 0

2 years ago

Can someone pls help me with this !

Vadim26 [7]

Using a line of best fit, the predicted tsunami speed for the following depths is given by:

a. 1151 km/h.

b. 572 km/h.

c. 130 km/h.

d. 122 km/h.

<h3>How to find the equation of linear regression using a calculator?</h3>

To find the equation, we need to insert the points (x,y) in the calculator.

For this problem, the points (depth, velocity) are given by:

(7000, 943), (4000, 713), (2000, 504), (200, 159), (50, 79), (10,36)

Inserting these points in the calculator, the velocity in function of the depth is:

v(d) = 0.12879d + 121.03448

Hence, the velocities are given as follows:

a. v(8000) = 0.12879 x 8000 + 121.03448 = 1151 km/h.

b. v(3500) = 0.12879 x 3500 + 121.03448 = 572 km/h.

c. v(70) = 0.12879 x 70 + 121.03448 = 130 km/h.

d. v(5) = 0.12879 x 5 + 121.03448 = 122 km/h.

More can be learned about a line of best fit at brainly.com/question/13203683

#SPJ1

8 0

7 months ago

-5/8 - (-4/3)<br> Pls help

Inessa05 [86]

Answer:

Step 1 of 2: Subtract.

Subtract

(

negative 5 over 8

−

5

8

) − (

negative 4 over 3

−

4

3

) =

17 over 24

17

24

Step 1 of 2: Subtract, sub-step a: Subtract a negative.

Subtract a negative

negative 5 over 8

−

5

8

− (

negative 4 over 3

−

4

3

) =

negative 5 over 8

−

5

8

+

4 over 3

4

3

Subtracting a negative is the same as adding a positive.

Step 1 of 2: Subtract, sub-step b: Find common denominator.

Find common denominator

negative 5 over 8

−

5

8

+

4 over 3

4

3

= −

( 5 × 3 ) over ( 8 × 3 )

5 × 3

8 × 3

+

( 4 × 8 ) over ( 3 × 8 )

4 × 8

3 × 8

=

negative 15 over 24

−

15

24

+

32 over 24

32

24

24 is the least common multiple of denominators 8 and 3. Use it to convert to equivalent fractions with this common denominator.

Step 1 of 2: Subtract, sub-step c: Add.

Add

negative 15 over 24

−

15

24

+

32 over 24

32

24

=

(

negative 15

−15 + 32 ) over 24

negative 15

−15 + 32

24

=

17 over 24

17

24

3 0

1 year ago

Read 2 more answers

Multiply the polynomial 3x2+4x+4)(2x-4)

Lorico [155]

Answer:

$\large \boxed{6x^{3} - 4x^{2} - 8x -16}$

Step-by-step explanation:

(3x² + 4x + 4)(2x - 4)

The easiest method is probably to use long multiplication.

3x² + 4x + 4

6x³ + 8x² + 8x

6x³ - 4x² - 8x -16

$\text{The product of the polynomials is $\large \boxed{\mathbf{6x^{3} - 4x^{2} - 8x -16}}$}$

8 0

2 years ago

Read 2 more answers

Mary has 23 marbles 7/23 of the marbles are yellow and 13/23 of the marbles are blue the rest of the marbles are green how many

deff fn [24]

Answer:

The answer here is 3.

Step-by-step explanation:

Since 7 of the marbles are yellow and 13 of them are green, you would first add these numbers together to find the number of marbles that are not green. After doing this you will find that 20 of the marbles aren't green. Since there are 23 marbles, and 20 of them aren't green, you would subtract these two numbers to find that the number of green marbles is three.

8 0

2 years ago