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3 years ago

I participated in a math competition but I did not do very good. Does anybody have some tips?

Mathematics

1 answer:

Stells [14]3 years ago

4 0

Study 5 times on the subject you are focusing on.

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When 12 is added to a number the result is 32 less than 3 times the number.

sdas [7]

Let the number = x

12 + x = 3x - 32

x = 3x - 44 Subtract 12 from both sides

-2x = -44 Subtract 3x from both sides

x = 22 Divide by -2

4 0

3 years ago

Read 2 more answers

How do you know if two lines segments are perpendicular

Greeley [361]

Answer:

when they are intersecting at a 90 degree angle.

Step-by-step explanation:

when lines intersect, they just cross over one another at any point. but with perpendicular lines, they have to be at a right angle. an example of this is a square. all of its corners are perpendicular

6 0

3 years ago

What’s the answer !?

svetoff [14.1K]

Answer:

Step-by-step explanation:

16(³/⁴) =

= (2⁴)(³/⁴)

= 2⁴ˣ³/⁴

= 2³

= 8

5 0

2 years ago

A boat heads north across a river at a rate of 2 miles per hour. If the current is flow A boat heads north across a river at a r

Ivahew [28]

Answer:

$\textrm{Resultant velocity}\ =\ \sqrt{29}\ miles/hour$

along the direction 68.19° from north.

Step-by-step explanation:

Given,

speed of the boat, u= 2 miles/hour along north

speed of the river, v= 5 miles/ hour along east

Since, north and east are perpendicular to each other, so we can write the resultant velocity in vector form as,

$\vec{r}\ =\ 2\hat{i}+5\hat{j}$

Hence, the magnitude of resultant velocity can be written as

$r\ =\ \sqrt{2^2+5^2}$

$=\ \sqrt{4+25}$

$=\ \sqrt{29}$

Hence, the magnitude of resultant vector is \sqrt{29} moles/hour.

And the direction of the boat can be given by,

$tan\theta\ =\ \dfrac{5}{2}$

$=>\ tan\theta\ =\ 2.5$

$=>\ \theta\ =\ tan^{-1}2.5$

= 68.19°

Hence, the resultant velocity of boat is $\sqrt{29}$ miles/hour along the direction making an angle 68.19° with the north.

8 0

2 years ago

Does anyone know these answers? 50 pts to you if u do.....don't steal from me.

snow_lady [41]

y = -2x + 3

y = -x + 10

y = 4x + 10

y = 3/2x - 2

y = -1/2x - 1

y = x + 5

y = 25x + 5

y = .99x + 1.99

y = x - 2

y = -1.50 + 1.50

y = 42x + 27

y = -1/3x - 2

now i am in my phone can see the photo

sometimes in the computer don't appear the picture

3 0

2 years ago

Read 2 more answers