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boyakko [2]
3 years ago
8

Twice a number x increased by 10 is 52

Mathematics
1 answer:
musickatia [10]3 years ago
4 0

Answer:

x = 21

Step-by-step explanation:

the equation is 2x + 10 = 52

2x = 42

x = 21

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What is the solution for <br> 8x+2y=13<br> 4x+y=11<br> In substitution method
padilas [110]
Solve for y in 4x+y=11

4x + y = 11
<span>y = 11 − 4x

</span>Substitute <span>y = 11 - 4x</span> into <span>8x + 2y =13 

22 = 13

</span>Since <span>22 = 13</span><span> is not true, this is an inconsistent system.
</span>
So, no solution. 

Hope this helped! :D
3 0
4 years ago
An open box is made from a 20 cm x 3 cm piece of tin by cutting a square from each corner and folding up the edges. The area of
Marta_Voda [28]

Answer:

Length of the final sides: 6 cm and 16 cm

Step-by-step explanation:

The lengths of the sides of the original box are

L=20 cm\\W=10 cm

Later, a piece of tin is cut out from each corner; the piece cut out has the shape of the square: we can call the length of its generic side x. Therefore, the dimensions of the box will now be:

L'=L-2x\\W'=W-2x

We also know that the area is

A=96 cm^2

And the area can be written as product of length and width, therefore:

A=L'W'

So we find:

A=(L-2x)(W-2x)\\96=(20-2x)(10-2x)

Solving for x,

96=200-20x-40x+4x^2\\4x^2-60x+104=0\\\\x^2-15x-26=0

Which has two solutions:

x = 13 cm (this is larger than the initial length of the width, therefore we discard it)

x = 2 cm

So, the length of the new sides are

L=20-2x=20-2(2)=16 cm\\W=10-2x=10-2(2)=6 cm

7 0
3 years ago
Write an expression that represents the value, in cents, of n nickels
VMariaS [17]

Answer:

5 cents=0.05 dollars

3 0
3 years ago
Mr Baker wants to divide his class into smaller, equal-sized groups of students. However, he finds that his class cannot be divi
Sloan [31]

Question is incomplete below is complete question.

Mr Baker wants to divide his class into smaller, equal-sized groups of students. However, he finds that his class cannot be divided evenly into any size group except for individual groups of 1​.Complete the statements below about the number of students in Mr Baker's class.

Answer:

The number of students in his class must be a prime number.

Step-by-step explanation:

Given:

Mr Baker wants to divide his class into smaller and equal-sized group of students.

Also class cannot be divided evenly into any size group except for individual groups of 1​.

If he cannot divide his team into smaller equal sized groups, that means that it cannot be divided by a number. Prime numbers are numbers that can only be divided evenly by themselves and 1.

Hence from above we can say that,

The number of students in his class must be a prime number.

8 0
4 years ago
How many positive whole numbers less than 100 are divisible by 3, but not by 2?
denis23 [38]

Answer:

Step-by-step explanation:

The easiest way to do this is either to find a pattern or list them. We'll list them first.

3 9 15 21 27 33 39 45 51 57 63 69 75 81 87 93  99

17 but there is a pattern

Starting with 3, add 6 to every number you find in the series. There is a formula that covers this

l = a + (n- 1)*d

a = 3

l = 99

d = 6

99 = 3 + (n - 1)*6             Subtract 3

99 - 3 = (n - 1)*6

96 = (n - 1)*6                  Divide by 6

96/6 = (n -1)*6/6

16 = n - 1                        Add 1 to both sides.

16+1 = n - 1 + 1               Combine

17 = n

5 0
2 years ago
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