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3 years ago

Find the area. 4 cm 6 cm 6 cm

Mathematics

1 answer:

Semenov [28]3 years ago

7 0

Answer:

30 cm²

Step-by-step explanation:

6*(4+6)/2=30 cm²

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Convert the decimal 0.8034 to a fraction and classify it as either rational or irrational.

Llana [10]

Answer:

Fractional form of 0.8034 $=\frac{4017}{5000}$

Since 4017 and 5000 are whole numbers this fraction is rational.

Step-by-step explanation:

We have $0.8034=\frac{8034}{10000} =\frac{4017}{5000}$

Fractional form of 0.8034 $=\frac{4017}{5000}$

Since 4017 and 5000 are whole numbers this fraction is rational.

7 0

3 years ago

How to answer this on descending powers of x please help pretty please

zheka24 [161]

Answer: 25x² - 64

<u>Step-by-step explanation:</u>

(5x + 8)(5x - 8)

= 5x(5x - 8) + 8(5x - 8)

= 25x² - 40x + 40x - 64

= 25x² + 0x - 64

= $\large\boxed{25x^2-64}$

NOTE: descending powers means the biggest exponent goes first, then the next biggest exponent, etc.

For example: x⁴ then x³ then x² then x then the number (which is actually x⁰)

4 0

3 years ago

A first number plus twice a second number is 14. Twice the first number plus the second totals 10. Find the numbers.

Nookie1986 [14]

Answer:

first number(x) = 2 second number(y)= 6

Step-by-step explanation:

This is an example of a simultaneous equation.

First write this word problem as equations, where x is the "first number" that you've mentioned and y is the "second number".

x + 2y = 14 (equation 1)

2x + y = 10 (equation 2)

This is solved using the elimination method.

We need to make one of the coefficients the same - in this case we can make y the same. In order to do this we need to multiply equation 2 by 2, so that y becomes 2y.

2x + y = 10 MULTIPLY BY 2

4x + 2y = 20 (this is now our new equation 2 with the same y coefficient)

Now subtract equation 1 from equation 2.

4x - x + 2y - 2y = 20 - 14 (2y cancels out here)

3x = 6

x = 2

Now we substitute our x value into equation 1 to find the value of y.

2 + 2y = 14

2y = 12

y = 6

Hope this has answered your question.

6 0

3 years ago

Read 2 more answers

Instructions: Find the missing side lengths. Leave your answers as radicals in simplest form.

ivanzaharov [21]

Answer:

x = 6

y = 3

Step-by-step explanation:

Give triangle is a right triangle.

By applying sine ratio in the given triangle,

sin(60)° = $\frac{\text{Opposite side}}{\text{Hypotenuse}}$

$\frac{\sqrt{3}}{2}=\frac{3\sqrt{3}}{x}$

x = 6

Now we take the cosine ratio in the given triangle,

cos(60)° = $\frac{\text{Adjacent side}}{\text{Hypotenuse}}$

$\frac{1}{2}=\frac{y}{x}$

y = $\frac{x}{2}$

y = $\frac{6}{2}=3$

Therefore, x = 6 and y = 3 will be the answer.

3 0

3 years ago

In june 2005 peter mailed a package from his local post office in fayetteville north carolina to a friend in radford virginia fo

erik [133]

0.23w = 2.07

w = 2.07 ÷ 0.23

w = 9 ounces

7 0

3 years ago