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3 years ago

What is the answer to this equation 3/7=c+4/35

Mathematics

2 answers:

sergey [27]3 years ago

7 0

C=11/35

You subtract 4/35 from both sides.

Allisa [31]3 years ago

4 0

$\dfrac{3}{7} =c+ \dfrac{4}{35}$ $\text{Given Equation}$

$\dfrac{3}{7} - \dfrac{4}{35} = c$ $\text{Subtract 4/35 from both sides}$

$c= \dfrac{11}{35}$ $\text{Solution}$

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How many different phone numbers are possible in the area code 503, if the first number cannot start with a 0 or 1

ElenaW [278]

Answer:

8 X 10^(9)

Step-by-step explanation:

Originally we have 10 digit phone numbers excluding the area code.

For each face value we have these in store: 0,1,2,3,4,5,6,7,8,9 (total 10)

But if we exclude 1 and 0 for the first digit, we are left with 8 digits.

8P1 X .......

In a phone number, digits can repeat so we can choose out of these 10 numbers freely after this.

8P1 X 10P1 X 10P1 X...

Adding the area code while assuming 10P1 is just 10...we get:

1 X 1 X 1 X 8 X 10^(9)

= 8000000000

Very interesting question, thanks for the opportunity!

7 0

3 years ago

Read 2 more answers

What is factorisation

liubo4ka [24]

Factorization is a method of writing numbers as the product of their factors or divisors.

Solution:

Factorisation:

Factorization is a method of writing numbers as the product of their factors or divisors.

In other words we can say, Finding what to multiply together to get an expression.

It is like "splitting" an expression into a multiplication of simpler expressions.

Methods of factorisation:

Factoring out the GCF

The sum-product pattern

The grouping method

The perfect square trinomial pattern

The difference of squares pattern

Factoring out the GCF:

This methods means that factoring out common factors

For example:

$12x^2 + 3x = 3x(4x + 1)$

This can be used when each term in given expression shares a common factor

The sum-product pattern

A quadratic equation may be expressed as a product of two binomials

For example:

$x^2 + 7x + 12 = (x + 3)(x + 4)$

This method can be used for quadratic equations of form $ax^2 + bx + c = 0$

The grouping method

If the polynomial is of the form $ax^2 + bx + c$ and there are factors of ac that add up to b , we can use this method

For example:

$2x^2 + 7x + 3\\\\2x^2 + 6x + 1x + 3\\\\2x(x + 3) + 1(x + 3)\\\\(x + 3)(2x + 1)$

The perfect square trinomial pattern

If the first and last terms are perfect squares and the middle term is twice the product of their square roots , we can use this method

For example:

$x^2 + 10x + 25\\\\(x + 5)^2$

The difference of squares pattern

If the expression represents a difference of squares, we can use this method

Because $a^2 - b^2 = (a + b)(a - b)$

For example:

$x^2 - 25\\\\x^2 - 5^2\\\\(x + 5)(x - 5)$

6 0

3 years ago

What expression represents the product of 17 and 4

Evgesh-ka [11]

17 • 4 is the equation that represents the product

4 0

3 years ago

AB is perpendicular to CD. If the slope of AB is 2/5, what is the slope of CD?

alekssr [168]

Given a slope $m$ , the slope $m'$ of a line perpendicular to $m$ is the opposite of the inverse of $m$

In other words:

$mm' = -1 \iff m' = -\dfrac{1}{m}$

So, the slope of CD is -5/2.

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3 years ago

Which ratio is equivalent to the ratio 30:48?

lord [1]

Answer: 5:8

Step-by-step explanation:

By reducing both sides equally, the ending answer is 5:8

(There can be many answers to your question but the one i told you is the most reduced one)

7 0

3 years ago

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