Please help! i have no clue what to do!!

Mathematics

1 answer:

Oksi-84 [34.3K]3 years ago

8 0

If you look up “Four 4s Challenge” on yt you should find a couple videos explaining it! i just watched a little bit of one so i’ll try and help now though.

I’ll do 1-5 for you and try my best to explain :)) and if you need more answers or more help just let me know

So first, we need to find out how to get 1 using four 4s

1. (4/4)/(4/4)

this would read “four divided by four divided by four divided by four” which equals 1

2. 4/4+4/4

3. (4+4+4)/4

4. 4*(4-4)+4

5. (4*4+4)/4

Remember that you’ve gotta use an equation with just four 4s to get to every number

You might be interested in

For a science experiment, Mr.Barrows divided 1/2 cups of salt into small jars,each clothing 1/10 cup. If he has 1/9 cup of salt

nadya68 [22]

Answer:

Number of jars filled is 3 $\frac{8}{9}$ (approximately 4).

Step-by-step explanation:

Initial amount of salt = 1/2 cup.

Amount of salt left = 1/9 cup.

Amount of salt used = 1/2 - 1/9

= $\frac{9-2}{18}$

= 7/18

The size of each jar = 1/10 cup.

Amount of salt used = size of the each jar x number of jars filled

7/18 = 1/10 x number of jars filled

number of jars filled = 7/18 ÷ 1/10

= 7/18 x 10/1

= 70/18

= 3 $\frac{8}{9}$

= 3.9

The number of jars filled is approximately 4.

3 0

3 years ago

Find the area of this shape

ArbitrLikvidat [17]

So you have 2 identical big triangles with the h = 5.75 and b = 4:

A=(1/2)bh=(1/2)*4*5.75=11.5
11.5*2=23

Then you have to smaller identical triangles with the h =2 and b=(4+4-4)/2=2

A=(1/2)*2*2=2
2*2=4

Then you have a rectangle:
A=bh=4*2=8

Add all the calculated areas:
A=23+4+8=35

The area of the shape is therefore 35 cm^2

Hope that helped.

8 0

3 years ago

Completing<img src="https://tex.z-dn.net/?f=a%5E2-8a%2B15%3D0" id="TexFormula1" title="a^2-8a+15=0" alt="a^2-8a+15=0" align="abs

dimulka [17.4K]

$a^2-8a+15=0\\
a^2-8a+16-1=0\\
(a-4)^2=1\\
a-4 =1 \vee a-4=-1\\
a=5 \vee a=3
$