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2 years ago

Which expression is equivalent to -6(-2/3+2x) -4-12x -4+2x 4-12x 4+12x

Mathematics

2 answers:

Basile [38]2 years ago

4 0

C. Is your answer to the question

tiny-mole [99]2 years ago

3 0

<h2><u><em>Answer:</em></u></h2><h2><u><em>4-12x</em></u></h2><h2><u><em>Step-by-step explanation:</em></u></h2><h2><u><em>brainliest plzs</em></u></h2>

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The area of square ABCD is 7cm².<br> Show that x² + 4x = 3

soldier1979 [14.2K]

Answer:

see explanation

Step-by-step explanation:

The area (A) of a square is calculated as

A = s² ( s is the measure of a side of the square )

Here s = x + 2 and A = 7, thus

(x + 2)² = 7 ← expand left side using FOIL

x² + 4x + 4 = 7 ( subtract 4 from both sides )

x² + 4x = 3 ← as required

4 0

3 years ago

A person stands 10 meters east of an intersection and watches a car driving towards the intersection from the north at 13 meters

In-s [12.5K]

Answer:

Therefore the rate change of distance between the car and the person at the instant, the car is 24 m from the intersection is 12 m/s.

Step-by-step explanation:

Given that,

A person stand 10 meters east of an intersection and watches a car driving towards the intersection from the north at 13 m/s.

From Pythagorean Theorem,

(The distance between car and person)²= (The distance of the car from intersection)²+ (The distance of the person from intersection)²+

Assume that the distance of the car from the intersection and from the person be x and y at any time t respectively.

∴y²= x²+10²

$\Rightarrow y=\sqrt{x^2+100}$

Differentiating with respect to t

$\frac{dy}{dt}=\frac{1}{2\sqrt{x^2+100}}. 2x\frac{dx}{dt}$

$\Rightarrow \frac{dy}{dt}=\frac{x}{\sqrt{x^2+100}}. \frac{dx}{dt}$

Since the car driving towards the intersection at 13 m/s.

so, $\frac{dx}{dt}=-13$

$\therefore \frac{dy}{dt}=\frac{x}{\sqrt{x^2+100}}.(-13)$

Now

$\therefore \frac{dy}{dt}|_{x=24}=\frac{24}{\sqrt{24^2+100}}.(-13)$

$=\frac{24\times (-13)}{\sqrt{676}}$

$=\frac{24\times (-13)}{26}$

= -12 m/s

Negative sign denotes the distance between the car and the person decrease.

Therefore the rate change of distance between the car and the person at the instant, the car is 24 m from the intersection is 12 m/s.

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2 years ago

A number increased by 15 is 38 as an equation

Vlad1618 [11]

Answer:

15 + x = 38

KEY:

<u>Increased = addition</u>

is= equals to

a number = put any random letter, or my choice is just using "x" so its just means a varaible

HOPE THIS HELPED!!!!! :D

3 0

3 years ago

Pedro had $235 in his saving account when Jim had $450 in his account. Look at the situation in the image. Which inequality show

11111nata11111 [884]

Answer:

$450>$235

Step-by-step explanation:

This is because, when 235 is subtracted from 450 there is a great difference thats why $450 is greater than $235

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2 years ago

How would I explain the slope and y-intercept of the equation y=8x+10???? need help soon please and thanks.

Dimas [21]

Step-by-step explanation:

with the formula y= mx+c the slope is m and the y intercept is c so the slope of this equation is 8 and the y intercept is 10

6 0

2 years ago