Easy way for a 2nd graders to learn marh

Mathematics

2 answers:

iris [78.8K]3 years ago

5 0

Send them to school and the teaches will teach him/her

zubka84 [21]3 years ago

3 0

Make them count jelly beans.

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Step by step method on how to solve the problem. Please and thanks a lot in advance♥️!!!!

nevsk [136]

see attached picture

answer is (x-2)

6 0

3 years ago

Find the sum of 8a –2b + 3c and –3a +4b –3c

IRISSAK [1]

ANSWER:
5a+2b

add the like terms together

4 0

2 years ago

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What is the slope of this graph?

Scorpion4ik [409]

Where is the graph? do you have a pic or website?

4 0

3 years ago

A rescue helicopter flew from its home base for 35 kilometers on a course of 330 degrees to pick up an accident victim. It then

artcher [175]

I've drawn a triangle to represent the journey (see attached.

The angle from Home to Victim to Hospital is:

a = $90 - (360 - 330) = 90- 30 = 60^o$

Using the cos rule, we can solve for the length x:

$a^2 = b^2 +c^2 - 2bccosA
\\x^2 = 35^2+25^2-2(35)(25)cos60
\\x^2 = 1850 - 875
\\x^2 = 975
\\x = \sqrt{975}
\\x = 31.2249...$

Using the cos rule, we can solve for angle b:

$a^2 = b^2 +c^2 - 2bccosA
\\35^2 = 31.22...^2+25^2-2(31.22...)(25)cosb
\\1225 = 975 + 625 - 1561.249...cosb
\\-375 = -1561.249...cosb
\\b = cos^{-1}( \frac{-375}{-1561.249...}) 
\\b = 76.1...$

So the bearing the helicopter has to travel is:

270 - 76.1 = 193.9 degrees (1 dp)

And the distance it travels is 31.2 km (1 dp)

5 0

3 years ago

Robert collected 330 aluminum cans. If 100 aluminum cans weigh 4 pounds, and the recycling center is paying 25 cents a pound, ho

labwork [276]

First, determine the weight of 330 cans with the given conditions,
(330 cans) x (4 lbs / 100 cans) = 13.2 lbs
Then, the price is determined by multiplying this weight to the price that the recycling center is paying,
(13.2 lbs) x (25 cents / lb) = 330 cents = $3.3
Thus, Robert will be paid $3.3.

4 0

3 years ago