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3 years ago

Helpppp!?! - 8 = - ( x + 4

Mathematics

2 answers:

navik [9.2K]3 years ago

8 0

-4 because it is negative on 8 so you take away

Vlad1618 [11]3 years ago

4 0

-8=-(x+4)
remember the invisible 1
-8=-1(x+4)
distribute using distributeiv porpety
a(b+c)=ab+ac
-1(x+4)=-x-4

-8=-x-4
add 4 to both sides
-4=-x
mutily both sides by -1
4=x

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of the 75 boys in the 7th grade class, 25 participate in at least one sport . of the 120 girls in 7th grade class 30

hoa [83]

Answer:

"No, the relationship is NOT proportional"

Step-by-step explanation:

Complete Question:

Of the 75 boys in the 7th grade class, 25 participate in at least one sport. Of the 120 girls in 7th grade class 30 participate in at least one sport. Is this relationship proportional?

We have to see the ratio of each and if they are equal (after reducing), we can say they are proportional.

Boys:

25 participate in atleast 1 sport and there are total of 75. Hence, ratio is

25 : 75 = 1 : 3

Girls:

30 particiapte in atleast 1 sport and there are toal of 120. hence ratio is:

30 : 120 = 1 : 4

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6 0

3 years ago

Solve 90x = 81+25x^2

qwelly [4]

Answer:

1.8

Step-by-step explanation:

Solve for x

Subtract

from both sides of the equation.

−

Subtract

from both sides of the equation.

−

Factor the left side of the equation.

Tap for more steps...

−

(

−

)

Multiply each term in

−

(

−

)

−

Tap for more steps...

(

−

)

Set the

−

equal to

−

Solve for

Tap for more steps...

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

1.8

Mixed Number Form:

Upgrade to

6 0

3 years ago

Given that f(–2.4) = -1 and f(-1.9) = -8, approximate f'(-2.4). f'(-2.4)

lora16 [44]

Answer:

f'(-2.4) ≈ -14

General Formulas and Concepts:
Algebra I

Coordinate Planes

Coordinates (x, y)

Slope Formula: $\displaystyle m = \frac{y_2 - y_1}{x_2 - x_1}$

Functions

Function Notation

Calculus

Differentiation

Derivatives
Derivative Notation

Step-by-step explanation:

*Note:

The definition of a derivative is the slope of the tangent line.

Step 1: Define

Identify.

f(-2.4) = -1

f(-1.9) = -8

Step 2: Differentiate

Simply plug in the 2 coordinates into the slope formula to find slope m.

[Derivative] Set up [Slope Formula]: $\displaystyle f'(-2.4) \approx \frac{f(x_2) - f(x_1)}{x_2 - x_1}$
Substitute in coordinates: $\displaystyle f'(-2.4) \approx \frac{-8 - -1}{-1.9 - -2.4}$
Evaluate: $\displaystyle f'(-2.4) \approx -14$

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Learn more about derivatives: brainly.com/question/17830594

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Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

6 0

3 years ago