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3 years ago

Help pls pls pls pls

Mathematics

1 answer:

Nana76 [90]3 years ago

5 0

Step-by-step explanation:

as with any division of a multiplication of various factors, we can always simplify by reducing the factors in the top and the bottom of the same base.

in the same way we can for example do

36×2⁶×3⁴×5² / 4×2⁵×3³×5²

and deal with every exponent base individually creating

9×2¹×3¹×5⁰ = 9×2×3

we can do with variable based exponents.

24a⁸b⁸c⁶ / 8a⁷b³c³ =

= 3a¹b⁵c³

you know, when we divide, we simply subtract exponents.

8-7, 8-3, 6-3

and the constants are simply divided 24/8 = 3

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8 over 15 minus 1 over 5

Citrus2011 [14]

Answer:

1/3

Step-by-step explanation:

(8/15) - (1/5)

change 1/5 to 3/15 (which is equivalent to 1/5)

(8/15) - (3/15) = (5/15)

Simplify

(5/15) = (1/3)

6 0

2 years ago

Read 2 more answers

If you're good at trigonometry please help me with question nine a and b and show full working out tyyyyyyyy ;)

Mariulka [41]

Problem 9, part a)

Compass bearings always have north as the starting point. This is where 0 degrees is situated, and 360 degrees as well. As the bearing angle increases, you'll turn to the right toward the eastward direction. Effectively you're sweeping out a clockwise rotation. The bearing 322 degrees is in a northwest position as the diagram shows (place the ship at the bottom right corner of the triangle). The bottom right acute angle of the triangle is 322 - 270 = 52 degrees. This is the reference angle we'll use for finding the distance d.

With respect to the reference angle of 52 degrees, the side 18.5 is the opposite side and d is the adjacent side. Use the tangent ratio to get...

tan(angle) = opposite/adjacent

tan(52) = 18.5/d

d*tan(52) = 18.5

d = 18.5/tan(52)

d = 14.4537840903742

The approximate value of d is 14.4537840903742 km

This rounds to 14.5 when rounding to one decimal place.

<h3>Answer: 14.5 km</h3>

=======================================================

Problem 9, part b)

Recall that

distance = rate*time

where "rate" is another term for "speed" or "velocity"

We can solve this for the time to get

time = distance/rate

------

We found the distance back in part a) above. We are given the rate of 48 km/h

So,

time = distance/rate

time = 14.4537840903742/48

time = 0.3011205018828

This is the time it takes in hours. Multiply by 60 to convert to minutes

0.3011205018828 hours = 60*0.3011205018828 = 18.067230112968 minutes

This rounds to the whole number 18

<h3>Answer: 18 minutes</h3>

5 0

3 years ago

Given that ABCD is an inscribed quadrilateral and m(ZDAB) = 78°. What is m(DAB)?

Rina8888 [55]

Answer:

204 degrees

Step-by-step explanation: maybe

4 0

2 years ago

Find the distance between the given points. Round your answers to

AleksandrR [38]

B six six wiz iwx in the car in a white car

3 0

2 years ago

Find a vector equation and parametric equations for the line through the point (7,4, 5) and parallel to the vector 3i 2j-k .

aleksley [76]

Answer: vector equation r = (7+3t)i + (4+2t)j + (5 - 5t)k

parametric equations: x = 7 + 3t; y = 4 + 2t; z = 5 - 5t

Step-by-step explanation: The vector equation is a line of the form:

r = $r_{0}$ + t.v

where

$r_{0}$ is the position vector;

v is the vector;

For point (7,4,5):

$r_{0}$ = 7i + 4j + 5k

Then, the equation is:

r = 7i + 4j + 5k + t(3i + 2j - k)

r = (7 + 3t)i + (4 + 2t)j + (5 - 5t)k

The parametric equations of the line are of the form:

x = $x_{0}$ + at

y = $y_{0}$ + bt

z = $z_{0}$ + ct

So, the parametric equations are:

x = 7 + 3t

y = 4 + 2t

z = 5 - 5t

4 0

3 years ago