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3 years ago

Plzz help I don't know how to solve this question so can you help me.

Mathematics

2 answers:

NARA [144]3 years ago

5 0

Answer:

f(-1) = 7^x

f(0) = 7^x

f(1) = 7^x

f(2) = 7^x

f(3) = 7^x

I think like this but not sure.

ddd [48]3 years ago

4 0

Plug in each of the x values to the x
Ex: 7^-1 or 7^0

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Please help me out with this problem!!!

Ronch [10]

Answer:

y = 3x - 2

Step-by-step explanation:

The equation is linear and expressed in slope- intercept form

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

Given (0, - 2 ) then c = - 2

Calculate the multiplier using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, - 2) and (x₂, y₂ ) = (1,1) ← 2 ordered pairs from the table

m = $\frac{1+2}{1-0}$ = 3, hence

y = 3x - 2 ← equation relating x and y

6 0

3 years ago

Write (x+7)(x−2) as a sum

Dennis_Churaev [7]

Answer:

x^2+5x-14

Step-by-step explanation:

you multiply both equations so that you get:

x^2-2x+7x-14

and then you simplify it to:

x^2+5x-14

<em><u>If you found this helpful please give it a thanks </u></em>

<em><u>I would also appreciate it if you give me a brainliest</u></em>

8 0

3 years ago

4. Sam's parents are teachers who commute 45 miles roundtrip to work 5 2 days a week. His parents spend $38 on gasoline each wee

Marat540 [252]

<h2>Answer:</h2><h2>The correct option is d. (i) and (ii)</h2>

Step-by-step explanation:

The total miles covered per day = 45

No of commuting days in a week = 5

Total miles in a week = 45 * 5 = 225

The total amount spent on gasoline = $ 38

Cost of gasoline per gallon = $ 2.48

The number of gallons consumed per week = $\frac{38}{2.48}$ = 15.32 gallons of gasoline per week.

This confirms (ii) statement

The amount spend on gasoline per mile = $\frac{38}{225}$ = $0.17

This confirms (i) statement

The number of miles per gallon of gasoline = $\frac{225}{15.32}$ = 14.68 miles

The statement (iii) is false.

7 0

3 years ago

A lake near the Arctic Circle is covered by a 2-meter-thick sheet of ice during the cold winter months. When spring arrives, the

Kaylis [27]

Answer:

The answer would be y-intercept and a point that is NOT an intercept

Step-by-step explanation:

To describe a point on the graph, we need a corresponding

(x,y)(x,y)

(x,y)

left parenthesis, x, comma, y, right parenthesis

pair.

In our case, these are corresponding values of weeks since spring arrives and thickness of ice.

weeks since spring arrivedthickness of ice↓↓(x,y)\begin{aligned} \scriptsize\text{weeks since spring arrived}&\quad\scriptsize\text{thickness of ice} \\ \downarrow&\quad\downarrow \\ \large (x &,\quad\large y) \end{aligned}

weeks since spring arrived

↓

thickness of ice

↓

,y)

To describe the slope of the graph, we need information about the rate of change of the relationship.

In our case, this is the rate at which the thickness of ice changes over time (in meters per week).

Hint #2

2 / 4

The ice is

meters thick at the start of spring, when

weeks have passed. This corresponds to the point

(0,2)(0,2)

(0,2)

left parenthesis, 0, comma, 2, right parenthesis

and is a

-intercept.

Hint #3

3 / 4

After

weeks, the sheet is only

1.251.25

1.25

1, point, 25

meters thick. This corresponds to the point

(3,1.25)(3,1.25)

(3,1.25)

left parenthesis, 3, comma, 1, point, 25, right parenthesis

and is not an intercept.

Hint #4

4 / 4

The

-intercept and a point that is not an intercept is given

7 0

3 years ago

Dy/dx of y=sin3xcos2x?

tatuchka [14]

Answer:

dy/dx = d/dx (sin3x.cos2x)

dy/dx = cos3x . 3 . -sin2x . 2 (Using chain rule)

dy/dx = -6cos3xsin2x

3 0

3 years ago

Plzz help I don't know how to solve this question so can you help me. ​

Plzz help I don't know how to solve this question so can you help me.