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2 years ago

Can someone help pls

Mathematics

1 answer:

AnnZ [28]2 years ago

5 0

Answer:

x = 0, x = 5

Step-by-step explanation:

x² - 5x = 0 ← factor out x from each term

x(x - 5) = 0

equate each factor to zero and solve for x

x = 0

x - 5 = 0 ⇒ x = 5

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Negitive 78 squared plus 3 a minus 9 minus 5 8th squared minus 6 a minus 4

Lorico [155]

Answer:

-6125

Step-by-step explanation:

negative 78 squared = -6084

-6084 + 3 - 9 = -6090

-6090 - 5 squared minus 6 minus 4 = --6125

I got confused by "8th" and "a minus" do you mean 3a, and 6a?

6 0

3 years ago

Can someone help me simplify these expressions

Sunny_sXe [5.5K]

Step-by-step explanation:

4. Let's multiply the coefficients. 2 * 6 * (-5) = -60. As for the exponents, since they have the same base we'll just add the exponents giving us s^(2 + 1 + 4) = s^7 so the answer is -60s^7.

7. -2/3 * -1/2 * -4 = -4/3 and the exponent is b^(2 + 3 + 4) = b^9 so the answer is -4/3b^9

4 0

3 years ago

Question attached below

tamaranim1 [39]

Answer:

B . $f(x+h)=\frac{x+h}{1+x+h}$

Step-by-step explanation:

Given function is:

$f(x)=\frac{x}{1+x}$

Sall h is used to denote minor change in function. The value of the new function f(x+h) will be calculated by putting x+h in place of x in the function.

So putting x+h in place of x

$f(x+h)= \frac{x+h}{1+(x+h)}\\=\frac{x+h}{1+x+h}$

So, option B is the correct answer ..

6 0

4 years ago

An air traffic controller spots two airplanes at the same altitude converging to a point as they fly at right angles to each oth

muminat

So.... notice the picture below

we know when y = 140 and x = 240, r = 250

so let's use the pythagorean theorem

$\bf r^2=x^2+y^2\implies 2r\cfrac{dr}{dt}=2x\cfrac{dx}{dt}+2y\cfrac{dy}{dt}\implies \cfrac{dr}{dt}=\cfrac{x\frac{dx}{dt}+y\frac{dy}{dt}}{r}
\\\\\\
\cfrac{dr}{dt}=\cfrac{240\cdot 480+70\cdot 140}{250}\implies \cfrac{dr}{dt}=500$

now... how much time does the controller have? well, say, plane "y" is going at dy/dt of 140mph, and is 70 miles away, 140 is 2*70, so it can cover those 70 miles in 1/2 hr, and when it does, it'll collide with the other,

so, the controller has that much, less than 1/2 hr

8 0

4 years ago

You have two jobs. Babysitting pays $5. Per hour. Mowing pays $6.00 per hour. You can work no more no more than 20 hours each we

FrozenT [24]

Five times 12 is 60 and Six times five us 30 add them up you get 90 dollar when you work 17 hours between to Jobs

8 0

4 years ago