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VARVARA [1.3K]
3 years ago
8

How do i know if i have brainly plus? i have recently not been getting limited answers and no 'ads' and I'm starting to get conc

erned if I have plus or not, if I do its draining my money and I don't want it is there any way to check
also is the sqrt of 10 -3?
Mathematics
1 answer:
kozerog [31]3 years ago
8 0

Answer:

Click on your profile icon (next to friends icon) at the bottom it will say what current plan you are on and.... the square root of 10 is positive 3

Step-by-step explanation:

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A balloon is rising at a constant speed of 5 ftys. A boy is cycling along a straight road at a speed of 15 ftys. When he passes
Ket [755]

Answer:

  13 ft/s

Step-by-step explanation:

t seconds after the boy passes under the balloon the distance between them is ...

  d = √((15t)² +(45+5t)²) = √(250t² +450t +2025)

The rate of change of d with respect to t is ...

  dd/dt = (500t +450)/(2√(250t² +450t +2025)) = (50t +45)/√(10t² +18t +81)

At t=3, this derivative evaluates to ...

  dd/dt = (50·3 +45)/√(90+54+81) = 195/15 = 13

The distance between the boy and the balloon is increasing at the rate of 13 ft per second.

_____

The boy is moving horizontally at 15 ft/s, so his position relative to the spot under the balloon is 15t feet after t seconds.

The balloon starts at 45 feet above the boy and is moving upward at 5 ft/s, so its vertical distance from the spot under the balloon is 45+5t feet after t seconds.

The straight-line distance between the boy and the balloon is found as the hypotenuse of a right triangle with legs 15t and (45+5t). Using the Pythagorean theorem, that distance is ...

  d = √((15t)² + (45+5t)²)

7 0
2 years ago
For a trip Eli packed 4 shirts, 2 pairs of pants, and 2 pairs of shoes. How many different outfits can Eli make?
Lorico [155]
4 shirts can be worn with one pair of pants twice and the shoes can be paired with each outfit. So I am going to say 8 outfits.
8 0
3 years ago
What is <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7B7%7D%20%20%3D%20%20%5Cfrac%7B4%7D%7B5%7D%20" id="TexFormula1"
frosja888 [35]

Multply both sides of the equation by 7.

\dfrac{x}{7}\cdot 7=\dfrac{4}{5}\cdot 7\\\\x=\dfrac{28}{5}=5.6

_____

When the variable is in the numerator of a proportion like this, you can solve it by multiplying by that denominator. That multiplication cancels the denominator and gives you the value of the variable.

In general, you multiply by the reciprocal of the coefficient of x. When that coefficient is 1/7, you multiply by 7/1. Of course, you know that 7/7 = 1 and that x/1 = x.

7 0
3 years ago
Y=-1/4x +9 what is the slope and y - intercept
zvonat [6]
Well your slope is -1/4 and your y-intercept is 9
5 0
3 years ago
Read 2 more answers
6x? – 552 + 9x +15/3x+2
maks197457 [2]

Answer:

55/2=x

Step-by-step explanation:

20x−550

7 0
3 years ago
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