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3 years ago

-10 divided by 7 1/5

Mathematics

1 answer:

mrs_skeptik [129]3 years ago

8 0

Answer:-1.38888888889

Step-by-step explanation:

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well I hate to say this but my question was there are 13 animals and 40 legs how many pigs and chickens are there and you said 9

Licemer1 [7]

Answer:

There are 7 Pigs and 6 Chickens

Step-by-step explanation:

Let's assume

Pigs= x

Chicken=y

(eq 1) x+y = 13----------y=13-x

4x + 2y = 40

replace the y

4x+ 2(13-x) = 40

you get x = 7

replace x in y=13 -x

you get y = 6

hence the answer.

4 0

3 years ago

20,10,5, ...<br> Find the 9th term.

iren [92.7K]

Answer:

0.078125.

Step-by-step explanation:

This is a geometric sequence with first term a1 = 20 and common ratio r = 10/20 = 5/10 = 0.5.

nth term = a1 r^(n -1) so here:

9th term = 20(0.5)^(9-1)

= 20(0.5)^8

= 0.078125.

6 0

2 years ago

1) If y = x3 + 2x and dx/ dt = 5, find dy/dt when x = 2. Give only the numerical answer. For example, if dy, dt = 3, type only 3

Semenov [28]

Answer:

a) 70

b) 10π ft²/ft

c) 0.24 ft/sec

Step-by-step explanation:

1) y = x³ + 2x

$\frac{dy}{dt}=\frac{d(x^3+2x)}{dt}$

$\frac{dy}{dt}$ = $3x^2\frac{dx}{dt}+2\frac{dx}{dt}$

at $\frac{dx}{dt}=5$ and x = 2

$\frac{dy}{dt}$ = $3(2)^2\times(5)+2\times(5)$

$\frac{dy}{dt}$ = 60 + 10 = 70

2) A = πr² ft²

$\frac{dA}{dr}=\frac{d(\pi r^2)}{dr}$

$\frac{dA}{dr}$ = 2(πr)

at r = 5 ft

$\frac{dA}{dr}$ = 2(π × 5) ft²/ft

$\frac{dA}{dr}$ = 10π ft²/ft

3) From Pythagoras theorem

Base² + Perpendicular² = Hypotenuse²

Thus,

B² + P² = H² .............(1)

here, H = length of the ladder

P is the height of the wall

B is the distance from the wall at bottom

B² + P² = 25² ...........(1)

at B = 20 ft

20² + P² = 25²

P² = 625 - 400

P = √225

P = 15 ft

differentiating (1) with respect to time, we get

$2B\frac{dB}{dt}+2P\frac{dP}{dt}=0$

at B = 20 ft, $\frac{dB}{dt} = 0.18$ and P = 15 ft

⇒ 2(20)(0.18) + $2(15)\frac{dP}{dt}$ = 0

$30\frac{dP}{dt}$ = - 7.2

$\frac{dP}{dt}$ = - 0.24 ft/sec (Here negative sign depicts the ladder slides down)

7 0

4 years ago

BRAINLIEST PLS HELP ASAP LINEAR EQUATIONS

Musya8 [376]

Answer:

first one

Step-by-step explanation:

Tracey bought 10 movies

some cost 13 and the others 16

Let x be the movies that cost 13 and y ones that cost 16

we can state that

x+y = 10

since Tracey both ten

13x+ 16y = 139

since the total price is 139

so the system is :

$\left \{ {{13x+16y=139} \atop {x+y=10}} \right.$

7 0

3 years ago

In six months, 33.6 gallons were used. Find the unit rate.

Nana76 [90]

I believe the answer is 5.6

Just divide 33.6 by 6

6 0

3 years ago