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2 years ago

Prove that 2n + 1 ≤ 2n for n ≥ 3

1 answer:

3 0

In order for something to be proven, there can be no counterexamples to prove it false.

$4 \geq 3 \\ n=4 \\ 2(4)+1 \leq 2(4) \\ 8+1 \leq 8 \\ 9 \leq 8$

9 is not greater than or equal to 8, therefore this statement is false.

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A dress maker had 27 yards of fabric.If she wanted to use the fabric to make 5 dresses,each using the same amount of fabric how

Alina [70]

Each dress will need 5.4 yards of fabric and the answer lies between 5 and 6

Step-by-step explanation:

Given

Total fabric = 27 yards

Dresses to be made = 5

In order to find the measurement of fabric for one dress, the total fabric will be divided by number of dresses to be made.

So,

$Fabric\ for\ one\ dress = \frac{Total\ fabric}{No.\ of\ dresses}$

$Fabric\ for\ one\ dress = \frac{27}{5}\\=5.4\ yards$

The answer lies between the whole numbers 5 and 6

Hence,

Each dress will need 5.4 yards of fabric and the answer lies between 5 and 6

Keywords: Fractions, Division

Learn more about fractions at:

#LearnwithBrainly

3 0

2 years ago

1769.9 in hours and secs<br><br> i need help

shusha [124]

Answer:

6,371,640 Seconds

Step-by-step explanation:

1hr=3600

1769.9x3600=6,371,640

5 0

2 years ago

Please help, need to find x and y :))

blondinia [14]

Answer:

x=14

y=140

Step-by-step explanation:

Using (9x+14) + (3x-2) = 180, we can solve this equation.

First add like values giving you 12x+12=180. Then subtract 12 from both sides giving you 12x=168.

Then divide both sides by 12 giving you x=14.

Finally, just simply set 9x+14 equal to y and substitute x for 14. This gives you 140=y

Hope this helped

6 0

2 years ago

Read 2 more answers

The volume of a sphere is 3,000 m^3. What is the surface area of the sphere to the nearest square meter?

vovangra [49]

Answer:

Step-by-step explanation:

V=4 /3πr3

3000=1 1/3*3.14*r*r*r

3000=4.18666667*r*r*r

716.560509= $r^{3}$

Cube root the number

8.94851471456=r

TSA=4 $\pi$ $r^{2}$

TSA=4*3.14*8.94851471456*8.94851471456

TSA=1006.26

Since we used different numbers for pi and I rounded our answer will be different but the answer is C

3 0

2 years ago

This table shows Jill's math quiz scores. What is the minimum score she needs on her next

Wewaii [24]

I think 90 im not sure tho i searched it up

6 0

2 years ago