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2 years ago

Please help i dont get this at all so please i will highly appreciate it .Thank youuu!!!

Mathematics

1 answer:

vfiekz [6]2 years ago

4 0

Answer:

The answer would be D 7mn+3m/2+5n/4

Step-by-step explanation:

A polynomial is a combination of terms separated by +

or − signs. A polynomial does not contain variables raised to negative or fractional exponents, variables in the denominator or under a radical, or any special features such as trigonometric functions, or logarithms.

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Evaluate the expression for the given value. 3x(x−2), when x=7 .

UkoKoshka [18]

Answer:

$\huge\boxed{Answer\hookleftarrow}$

Given,

$x = 7$

Substitute the value of 'x' in the equation 3x (x - 2).

One way :-

$3x(x - 2) \\ = 3 \times 7(7 - 2) \\ = 21(5) \\ = 21 \times 5 \\ = 105$

Second way :-

$3x(x - 2) \\ = 3x {}^{2} - 6x \\ = 3 \times (7) {}^{2} - 6(7) \\ = (3 \times 49) - (6 \times 7) \\ = 147 - 42 \\ = 105$

✐ The answer is 105.

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3 years ago

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2 years ago

Find the sum of the two fractions show your work 3/8 and 1/2

Romashka [77]

Answer: 7/8

Step-by-step explanation: Notice that 1/2 and 3/8 are unlike fractions. Our first when adding unlike fractions is to get a common denominator.

The common denominator of 2 and 8 will be the least common multiple of 2 and 8 which is 8.

To get an 8 in the denominator of 1/2, we multiply the numerator and the denominator by 4 which gives us 4/8.

Notice that 3/8 already has an 8 in the denominator so we leave it how it is.

Now we are adding like fractions.

To add like fractions, or fractions that have the same denominator, simply add the numerators and keep the original denominator.

So here, if we add the numerators we have 4 + 3 which gives us 7 and we put this over our original denominator which is 8 and we have our answer. Also, notice that 7/8 is in lowest terms so it's our final answer.

This means that 3/8 + 1/2 = 7/8

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3 years ago