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jekas [21]
2 years ago
8

How many cubes of edge 4cm, each can be cut out from cuboid whose length, breadth and height are 20 cm, 18 cm and 16 cm respecti

vely.​
Mathematics
1 answer:
My name is Ann [436]2 years ago
3 0

Answer:

90 cubes.

Step-by-step explanation:

First we find volume of the cuboid.

Volume = l x b x h = 20 x 18 x 16 = 5760 cm³

Now,

Volume of a single cube = l³ = 4³ = 64

No of cubes that can be cut out from the cuboid is

= Volume of cuboid/ volume of cube

= 5760/ 64

= 90 cubes

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What is the solution to the following system of equations?
erastova [34]

Answer:

(6,0)

Step-by-step explanation:

Given equations are:

\[x - 4y = 6\]         -------------------- (1)

\[2x + 2y = 12\]    -------------------- (2)

Multiplying (1) by 2 :

\[2x - 8y = 12\]     -------------------- (3)

Calculating (2) - (3) :

\[2x + 2y -2x + 8y = 12 - 12\]

=> \[10y =0\]

=> \[y = 0\]

Substituting the value of y in (1):

\[ x  = 6 \]

So the required solution of the system of equations is x=6,y=0. This can be alternatively expressed in coordinate notation as (6,0).

5 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST could anyone help me
drek231 [11]
1) 6x - 5y = 5
3x + 5y = 4

9x = 9
x = 9/9
x = 1

So,your final answer is x = 1.

2) It would be: -x - 3y = -12
x + 3y = 12
x = 12 - 3y

So, option B would be your final answer.

Hope this helps!


3 0
3 years ago
Solve inequality.<br> |3n-2|-2&lt;1
pychu [463]

\text{Hello there! :)}

\boxed{-1/3 < n < 5/3}

|3n - 2| - 2 < 1

\text{Begin simplifying by adding 2 to both sides:}

|3n - 2| < 3

\text{ Solve for the positive and negative solutions:}

3n - 2 < 3\\\\3n < 5\\\\n < 5/3

-(3n - 2) < 3\\\\\text{Switch sign when dividing by a negative:}\\\\3n - 2 > - 3\\\\3n > - 1\\\\n > -1/3

\text{Therefore, the solutions for the inequality are:}\\\\-1/3 < n < 5/3

8 0
3 years ago
Write the standard form of the quadratic function that has the indicated vertex and whose graph passes through the given point.
krok68 [10]

Answer:

y =  ( x − 2 ) ^ 2 + 3

y =   x^2 − 4x + 7

Step-by-step explanation:

y = a ( x − h ) ^ 2 + k

where vertex is (h,k) = (4,-1)

h=4, k=-1

y = a ( x − 4 ) ^ 2 - 1

sub ( 2,3 )

3 = a (2 - 4)^2 - 1

a=1

y = 1 ( x − 2 ) ^ 2 + 3

y =  ( x^2 − 4x + 4 )  + 3

y =   x^2 − 4x + 7

5 0
3 years ago
I need help!. My daughters lesson is on improper Fractions and mixed numbers. I need the answers to all of these math problems a
Lerok [7]
When doing improper fractions, you're going to keep the denominator the same. For example in question number 6, there are 18 triangles filled in so the improper fraction would be 18/5. Mixed numbers consist of the number of whole numbers filled and the remainder in the fraction. Therefore number 7, mixed number is 2 3/5 and the improper fraction would be 13/5. I'll list the rest of the answers below:
8.) Mixed: 1 3/5 Improper: 8/5
9.) Mixed: 4 1/4 Improper: 17/4
10.) 5/4, 7/4
12.) 13/8, 7/4, 19/8, 5/2, 21/8
13.) 4/3, 17/9, 7/3

Note: You can simplify improper fractions, this is why you'll get different denominators on the number line questions.
8 0
3 years ago
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