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9966 [12]
3 years ago
14

Multiply out 5x (x + 3y)

Mathematics
2 answers:
GrogVix [38]3 years ago
7 0

Answer:

5x²+15xy

Step-by-step explanation:

5x(x+3y)=

5x²+15xy

If you need more steps or more explanation, reply to this answer.

il63 [147K]3 years ago
3 0

Answer:

Step-by-step explanation:

5x(x+3y)

5x^2+15xy

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Part A- Create a fourth degree polynomial in standard form. How do you know it is in standard form?
Alexeev081 [22]

Answer:

(a)2x^4-9x^3+x^2+x-5

Step-by-step explanation:

(a)The degree of a polynomial is the highest power of the unknown variable in the polynomial.

A polynomial is said to be in standard form when it is arranged in descending order/powers of x.

An example of a fourth degree polynomial is: 2x^4-9x^3+x^2+x-5

We know the polynomial above is in standard form because it is arranged in such a way that the powers of x keeps decreasing.

(b)Polynomials are closed with respect to addition and subtraction. This is as a result of the fact that the powers do not change. Only the coefficients

change. This is illustrated by the two examples below:

(2x^5-3x^2+x)+(3x^5-5x^2)\\=2x^5-3x^2+x+3x^5-5x^2\\=5x^5-8x^2+x\\$Similarly\\(2x^5-3x^2+x)-(3x^5-5x^2)\\=2x^5-3x^2+x-3x^5+5x^2\\=-x^5+2x^2+x

The degrees do not change in the above operations. Only the number beside each variable changes. Therefore, the addition and subtraction of polynomials is closed.

7 0
3 years ago
$800 and paid 14% tax what was final bill
evablogger [386]

Answer:

$912

Step-by-step explanation:

First, find the tax.

Multiply the tax rate by the price.

tax rate * price

The tax rate is 14% and the price is $800.

14% * 800

Convert 14% to a decimal. Divide 14 by 100 or move the decimal places 2 spaces to the left.

14/100=0.14

14.0–> 1.4 —> 0.14

0.14 * 800

Multiply

112

The tax is $112.

Now find the total bill.

Add the tax and the price.

tax + price

The tax is $112 and the price is $800.

$112 + $800

Add

$912

The final bill is $912.

4 0
3 years ago
Read 2 more answers
What are the possible values of x in 32x + 20 = 28x − 16x2?
klemol [59]
<span>No two such factors can be found

</span>
5 0
3 years ago
Jennifer is saving 1/8 of her salary to buy a phone. Find her weekly pay is she has saved $65
Helen [10]

Let her monthly salary be x

1/8x = $65

x = $65 × 8 = $520

Her weekly pay is $520 ÷ 4 = $130

5 0
3 years ago
Section 1 - Question 3 Which expression would produce the greatest product? A 10 × 1/2 10 × 1/ 10 × 100 10 × 3 B C
GalinKa [24]

Answer:

A: 10 x 1/2 = 15

Step-by-step explanation:

dfghj

6 0
3 years ago
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