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3 years ago

Name a number that cant be evenly divided by 6 and by 7

Mathematics

2 answers:

Luba_88 [7]3 years ago

4 0

42 can easily be divided by both 6&7.

Vesna [10]3 years ago

3 0

Any number $42k$ where $k\in\mathbb{Z}$ .

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Someone please please..help me I don’t want to fail this..

Arada [10]

Step-by-step explanation:

hope it helps you........

6 0

3 years ago

How do you factor 125-x^3?

xz_007 [3.2K]

Step-by-step explanation:

We have

$125 - x {}^{3}$

First, 125 is a perfect cube because

$5 \times 5 \times 5 = 125$

and

x^3 is a perfect cube because

$x \times x \times x = x {}^{3}$

so we can use the difference of cubes identity

$( {x}^{3} - {y}^{3} ) = (x - y)( {x}^{2} + xy + {y}^{2} )$

Let say we have two perfect cubes:

64 because 8×8×8=64

and 27 because 3×3×3=27 and let subtract

$64 - 27$

we know that

$64 - 27 = 37$

but using the difference of cubes identity we should get the same thing.

Remeber cube root of 64 is 4 and cube root of 27 is 3 so we have

$(4 - 3)( {4}^{2} + 4(3) + 3 {}^{2} )$

$1(16 + 12 + 9) = 1(37) = 37$

So the difference of cubes works for real numbers. This is a good way to help remeber the identity using real numbers.

Back on to the topic,

we know that 5 is cube root of 125 and x is the cube root of x^3 so we have

$(5 - x)( {5}^{2} + 5x + {x}^{2} ) =$

$(5 - x)(25 + 5x + {x}^{2} )$

3 0

3 years ago

Read 2 more answers

Find the value of m and b for the equation 0=-9x+5y+25

lukranit [14]

Answer:

X= -5

Y=-2.7

Step-by-step explanation:

YOU DO THIS BY SUBTRACTING 25 ON THE RIGHT SIDE TO THE LEFT ONLY LEAVING YOU WITH VARIABLES.

THEN YOU SUBSTITUTE ZERO INTO Y TO FIND X THEN SUBTITUTE ZERO INTO X TO FIND Y

BTW SUBSTITUTE ONE INTO THE VARIABLE YOU ARE FINDING

8 0

3 years ago

How much longer, to the nearest minute, would it take to travel 290 miles at 60mph versus 70 mph.

velikii [3]

So using the equation distance = velocity * time
we get distance/velocity = time
60 MPH: 290/60 = 4.83333 Hours
60 MPH: 290/70 = 4.1429 Hours

Difference between them:
4.8333 - 4.1429 = 0.69 Hours, then multiply that by 60 and you get
41 Minutes.

Hope this helped!
*psst it would help if you gave me brainliest answer, I'm close to ranking up :) Thanks!

3 0

3 years ago

Read 2 more answers

If there are 6 grams of tea leaves to make 24 fluid ounces of tea last week she made 288 fluid ounces of tea how many grams of t

NikAS [45]

72 grams! 6 grams = 24 fluid ounces. Thats exactly 1/4. So what you would do is take 288 and divide by 4 and you would get 72 grams!

4 0

4 years ago

Read 2 more answers