3 years ago

Please help! 4x(5y-x)-5y(4x-y)

Mathematics

2 answers:

Andreas93 [3]3 years ago

8 0

Anvisha [2.4K]3 years ago

6 0

= 4x(5y-x) - 5y(4x-y)
= 20xy-4x²- 20xy+5y²
= -4x²+5y²

You might be interested in

Nina earns $15 for each yard she mowes. she wants to buy a dress that coasts $109. how many yards will she need to mow to earn m

xxTIMURxx [149]

she will need to mow 8 yards because 109 divided by 15 equals 7.2 but she cant just mow 7.2 yards so you round up to 8 yards

8 0

3 years ago

4 more than 4 times x is 45

balu736 [363]

4 more than 4 times x is 45 the answer will be x=41/4

3 0

3 years ago

Read 2 more answers

If x varies inversely as y and x=2.5 when y = 40 , find y when x = 2

Illusion [34]

Answer:

2.5/40=2/y

2.5y=40x2

2.5y=80

y=80/2.5

y=32

6 0

2 years ago

A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 20° above the horizontal. How far does the ju

weeeeeb [17]

Answer:

x = 9.5 m

Step-by-step explanation:

Given:

This problem is based on 2D motion kinematics equations:

$V_0 = 12 m/s$

$\theta = 20^0$

$g=9.8 m/s^2$

At maximum height:

$V_y = 0$

Components of initial velocity:

$V_0x = V_0 cos (\theta) =(12 )(cos (20^0)) = 11.3 m/s$

$V_0x = V_0 sin (\theta) = (12)(sin (20^0)) = 4.10 m/s$

To find time to reach maximum height:

$V_y = V_0y -gt$

Plugging in the known values:

0 = 4.10 - 9.8t

$t = \frac{-4.10}{-9.8}$

$t = 0.418 s$

Total time = 2t = 2(0.418) = 0.836 s

to find horizontal distance covered:

$x = (V_0x)(t)\\x = (11.3)(0.836)\\x = 9.5 m$

8 0

3 years ago

3.2 km is equivalent to which of the following? You may choose more than one correct answer

stiks02 [169]

Options 2, 4, 6 are correct.

8 0

3 years ago

Read 2 more answers