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3 years ago

11

Help me I don’t understand

1 answer:

elena55 [62]3 years ago

6 0

Answer:

It is B i think

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How do you work this out? need help asap

Svetlanka [38]

Hello,

Line 1 is passing through (-4,3), (-2,7) has a slope of (3-7)/(-4+2)=2

Line 2 is passing through (2,9), (4,1) has a slope of (9-1)/(2-4)=-4

One other way:

y=9-1/2 x²
y'=-x

gradient 1=-(-2)=2 for point (-2,7)

gradient 2=-(4)=-4 for point(4,1)

6 0

3 years ago

A teacher administers three different versions of a test to his students. The two-way table shows the results. Find each probabi

kakasveta [241]

The P(pass | Test A) is 31.81%, P(pass | Test B) is 29.87%, and P(pass | Test C) is 22.07%

<h3>What is probability?</h3>

It is defined as the ratio of the number of favourable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.

Part A:

Total number of students = 154

Total number of students passed the test = 49

The probability:

P(pass | Test A) = 49/154 = 31.81%

Part B:

Total number of students = 154

Total number of students passed the test = 46

The probability:

P(pass | Test B) = 46/154 = 29.87%

Similarly, for the probability:

P(pass | Test C) = 34/154 = 22.07%

Thus, the P(pass | Test A) is 31.81%, P(pass | Test B) is 29.87%, and P(pass | Test C) is 22.07%

Learn more about the probability here:

brainly.com/question/11234923

#SPJ1

5 0

3 years ago

Determine whether the sequence could be arithmetic. "yes" or "no".<br><br> 28, 21, 15, 10, 6, ...

IRISSAK [1]

No there is no pattern

4 0

3 years ago

Jon wanted to solve this problem: Given that sin 0=1/4, what is the value of cos 0? What did he do wrong?

Pepsi [2]

Answer:

Step 2 is wrong

Step-by-step explanation:

$(Sin Ф )^{2}$ = $(1/4)^{2}$ = 1/16

7 0

3 years ago

What is the equation of the line that is parallel to the given line and passes through the point (−3, 2)?

PIT_PIT [208]

Answer:

4x + 3y = - 6

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

• Parallel lines have equal slopes

calculate the slope of the line using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 3) and (x₂, y₂ ) = (3, - 1) ← 2 points on the line

m = $\frac{-1-3}{3-0}$ = $\frac{-4}{3}$ = - $\frac{4}{3}$ , then

y = - $\frac{4}{3}$ x + c ← is the partial equation

to find c substitute (- 3, 2 ) into the partial equation

2 = 4 + c ⇒ c = 2 - 4 = - 2

y = - $\frac{4}{3}$ x - 2 ← equation in slope- intercept form

multiply through by 3 to clear the fraction

3y = - 4x - 6 ( add 4x to both sides )

4x + 3y = - 6 ← in standard form

3 0

2 years ago