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2 years ago

How do you solve (a²-28)÷(a-5)

Mathematics

1 answer:

Oksana_A [137]2 years ago

7 0

Answer:

<h2>Divide the highest order term in the dividend a2a2 by the highest order term in divisor aa.</h2>

Step-by-step explanation:

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QUICK!!!!! Which question is best modeled with a division expression?

hjlf

Answer:

Step-by-step explanation:

$\frac{2}{3.5}$

Which is about .57

7 0

3 years ago

A classroom has a height of 8 feet and is 30 feet long. If the volume of the room is 6,000 ft 3 , how wide is the classroom?

Elza [17]

Height*length*width=volume, therefore 8*30*width=6000 therefore width=6000/240=25 feet

4 0

3 years ago

Read 2 more answers

Whatdkdjfdjjfksakknshaja

trapecia [35]

i think you have to multiply those. thats it

8 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.

8 0

3 years ago

Solve the quadratic equation for x in the simplest equation -6x^2+15x+9=0

Alexus [3.1K]

Answer:

x = 3, -1/2

Step-by-step explanation:

Use the quadratic formula: x = [-b ± √b² - 4ac]/2a

The square root sign should be over the entire expression b² - 4ac

In this problem, a = -6, b = 15, and c = 9

So, putting in those values, we get x = -15 ± √225+216, all divided by -12

Simplifying further, we get -15 ± 21 all divided by -12, or -36/-12 = 3 OR

6/-12 = -1/2

6 0

3 years ago