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2 years ago

Help me please 4 questions 50 points this is due today

Mathematics

2 answers:

slamgirl [31]2 years ago

7 0

Answer:

1) Left 5, Down 1

2) A, C, D

3) B

4) D

Step-by-step explanation:

Desmos graphing calculator will help you with all of these.

Alisiya [41]2 years ago

5 0

Answer:

Q15: A

Q12: A,C,D

Q13: B

Q14: C

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Which graph represents a proportional relationship?

nikdorinn [45]

Answer:

On a coordinate plane, a straight line with positive slope goes through points (3, 3) and (4, 4).

Step-by-step explanation:

both points when divided (y÷x) should give the same answer for it to be proportional

meaning

4÷4 = 1 and 3÷3 = 1

someone else in brainly gave a great answer too

auroraborealis

Ace

861 answers

2M people helped

Answer:

D. On a coordinate plane, a straight line with positive slope goes through points (3, 3) and (4, 4).

Explanation:

For a relationship to be proportional it needs to meet two conditions:

1) its graph needs to be a straight line

2) every point of the graph needs to satisty the equation y = k•x, or, in other words k has to be equal for every point

Now, let's check the answers;

A) we have two points: A (2, 6) and B (4, 5). For point A, x is 2 and y is 6, so:

y = k•x

6 = k•2

k = 3

For point B, x is 4 and y is 5, so:

y = k•x

5 = k•4

k= 5/4

Since k isn't the same value for these two points, this isn't proprtional relationship.

B) this graph is curve, so since it's not a straight line it can't be proportional relationship.

C) similarly to graph A we have point A (5, 2) and point B (6, 3).

For point A, x is 5 and y is 2, so:

y = k•x

2 = k•5

k = 2/5

For point B, x is 6 and y is 3, so:

y = k•x

3 = k•6

k = 1/2

Again values of k aren't the same, so this isn't a proportional relationship.

D) Point A (3, 3) and point B (4, 4). For point A, x is 3 and y is 3, so:

y = k•x

3 = k•3

k = 1

For point B, x is 4 and y is 4, so:

y = k•x

4 = k•4

k = 1

Since value of k is the same for both points, this graph shows the proportional relationship.

4 0

2 years ago

What is the range of the function f(x) = = 3x + 2 in the domain -2

djyliett [7]

Answer:

The range is:

{-4, 1, 2, 5, 8}

Step-by-step explanation:

Given the function

$f(x)=3x+2$

We know that the domain of a function is the set of input or argument values for which the function is real and defined.

As the domain interval -2 ≤ x ≤ 2

i.e. the values in the domain = {-2, -1, 0, 1, 2}

We also know that the range of a function is the set of values of the dependent variable for which a function is defined.

As the domain interval -2 ≤ x ≤ 2

Putting all the x-values in the domain interval in the function

putting x=-2 in the function

$f(x)=3x+2$

$f(-2)=3(-2)+2=-6+2=-4$

putting x=-1 in the function

$f(x)=3x+2$

$f(-1)=3(-1)+2=-3+2=1$

putting x=0 in the function

$f(x)=3x+2$

$f(0)=3(0)+2=0+2=2$

putting x=1 in the function

$f(x)=3x+2$

$f(1)=3(1)+2=3+2=5$

putting x=2 in the function

$f(x)=3x+2$

$f(2)=3(2)+2=6+2=8$

Thus, when we put the domain values, the corresponding range values are:

x y

-2 -4

-1 1

0 2

1 5

2 8

Therefore, the range is:

{-4, 1, 2, 5, 8}

8 0

2 years ago

Given the following geometric sequence, find the common ratio: {225, 45, 9...}

Tom [10]

Answer:

$\frac{1}{5}$ is the common ratio

Step-by-step explanation:

Common ratio(r) states that the ratio of each term of a geometric sequence to the term preceding it.

$r = \frac{a_2}{a_1} =\frac{a_3}{a_2}........\frac{a_{n+1}}{a_n}$

Given the sequence:

225, 45, 9, .........

Here,

$a_1 = 225$

$a_2 = 45$

$a_3 = 9$ and so on...

Using definition to find r.

$r = \frac{45}{225}=\frac{9}{45}......$

After solving we get;

$r = \frac{1}{5}$

Therefore, the common ratio is, $\frac{1}{5}$

8 0

3 years ago

Read 2 more answers

Please answer this multiple choice question for 27 points and brainliest!!

storchak [24]

Answer:

Step-by-step explanation:

The equation will be in the form

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

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 5) and (x₂, y₂ ) = (2.5, 0) ← 2 points on the line

m = $\frac{0-5}{2.5-0}$ = - 2

The line crosses the y- axis at (0, 5) ⇒ c = 5

y = - 2x + 5 or

y = 5 - 2x → A

5 0

3 years ago

Simplify n-3 n-2/n^-6n^5 A) 1/n^-4 B)1/n^4 C)n^-6 D)n^4

pychu [463]

Answer:

Step-by-step explanation: was uuu

5 0

3 years ago