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Sindrei [870]
3 years ago
13

What is the number?

Mathematics
2 answers:
Korvikt [17]3 years ago
5 0

Step-by-step explanation:

the number is then

x.y

y = x + 1

x + y = 7

using the first equation as identity in the second equation :

x + x + 1 = 7

2x = 6

x = 3

and therefore

y = x + 1 = 3 + 1 = 4

so, the number is 3.4

kotegsom [21]3 years ago
3 0

Answer:

3 and 4

Step-by-step explanation:

3 and 4 added up is 7,4 is one number mor than 3

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If 10% of x is 30, what is 23% of x <br> A. 33<br> B. 46<br> C. 200<br> D. 230
aliina [53]

Answer:

69

Step-by-step explanation:

I'm mathematics, the word 'of' transfers into becoming 'times or Multiply'

Therefore, the expression can be rewritten as:

10/100 of x = 30

10x / 100 = 30

Cross Multiply the equation to solve for x

10x = 100 * 30

10x = 3000

x = 3000 / 10

x = 300

(Since we gotten the value of x as 300) let's find 23% of it.

Therefore,

23% of x, ( when x is 300)

= 23/100 * 300

= 23 * 3

= 69

(Well, although that's the workable solution, the option doesn't seen to tally)

Maybe you check the source, but am certain about the Solution.

Let's keep learning, maths is fun !

3 0
3 years ago
Read 2 more answers
What is equivalent to 8c+6-3c-2
IgorC [24]
8c + 6-3c -2

8c -3c + 6-2 = 5c + 4

Brainliest please!
8 0
3 years ago
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A flat screen television measures diagonally 40 inches and 24 inches in length. What
Akimi4 [234]
The width should be 32 inches.
5 0
3 years ago
Simplify. 8c³d²/4cd²
loris [4]

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2c exponent 4 d exponent 4

6 0
3 years ago
1. Kalena was asked to prove ifx(x - 1)(x + 1) = x3 - X represents a polynomial identity. She
Verdich [7]

Answer:

C. Kalena made a mistake in Step 3. The justification should state: -x²

+ x²

Step-by-step explanation:

Given the function x(x - 1)(x + 1) = x3 - X

To justify kelena proof

We will need to show if the two equations are equal.

Starting from the RHS with function x³-x

First we will factor out the common factor which is 'x' to have;

x(x²-1)

Factorising x²-1 using the difference of two square will give;

x(x+1)(x-1)

Note that for two real number a and b, the expansion of a²-b² using difference vof two square will give;

a²-b² = (a+b)(a-b) hence;

Factorising x²-1 using the difference of two square will give;

x(x+1)(x-1)

Factorising x(x+1) gives x²+x, therefore

x(x+1)(x-1) = (x²+x)(x-1)

(x²+x)(x-1) = x³-x²+x²-x

The function x³-x²+x²-x gotten shows that kelena made a mistake in step 3, the justification should be -x²+x² not -x-x²

6 0
3 years ago
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