3 years ago

100 POINTS PRE-CALCULUS

Mathematics

2 answers:

kiruha [24]3 years ago

4 0

Answer:

The first one is the third option and the second one is B.

Step-by-step explanation: Did the assignment.

Sonja [21]3 years ago

3 0

Answer:

not sure for the 1st one but pretty sure 2nd one is B

Step-by-step explanation:

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N a classroom of 33 students, the ratio of boys to girls is 3 : 8. How many boys are in the class?

tiny-mole [99]

3 boys + 8 girls = 11 students

3 boys/ 11 students = x boys /33 students

using cross products

3 * 33 = x*11

divide by 11

99/11 = x

x=9

There are 9 boys

4 0

3 years ago

-5x + 2 = 67 <br> Can you help me?

coldgirl [10]

Answer:

-13

Step-by-step explanation:

-5x + 2 = 67

-5x = 65

5x = -65

x = -13

8 0

3 years ago

Estimate the line of best fit using two points on the line 100 90 80 70 (e, 80) 60 30 20 10 (2.20) 10 O A. y= 2x O B. y = 2x+10

nexus9112 [7]

Answer:

$y = 10x$

Step-by-step explanation:

Given

The attached plot

Required

The line of the best fit using $(8,80)$ and $(2,20)$

We have:

$(x_1,y_1) = (8,80)$

$(x_2,y_2) = (2,20)$

Calculate slope (m)

$m = \frac{y_2 - y_1}{x_2 - x_1}$

$m = \frac{20 - 80}{2- 8}$

$m = \frac{-60}{-6}$

$m = 10$

The equation is then calculated using:

$y = m(x - x_1) + y_1$

$y = 10(x - 8) + 80$

Expand

$y = 10x - 80 + 80$

$y = 10x$

5 0

3 years ago

Solve for X:

saveliy_v [14]

$- \frac{6}{5} x - 4 = - 46 \\ - \frac{6}{5} x = - 42 \\ - 6x = - 210 \\ x = 35$
Translate the words into math and solve for x. Any questions let me know.

3 0

3 years ago

What is the expression 4c - 3 when c = 2

harkovskaia [24]

The expression -> 4 • 2 - 3
the answer to the expression would be 5

4 0

3 years ago