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3 years ago

Pls help this is due really soon

Mathematics

2 answers:

alekssr [168]3 years ago

4 0

The first person is correct

lora16 [44]3 years ago

3 0

Answer: I think that the answer is 100.

Step-by-step explanation: the line is straight and horizontal, and straight horizontal lines r 180 degrees, we already have 80 degrees so X is 100.

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The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t

Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

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

And:

$Average = (1 - 30\%) * x$ -----30% less than x

Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

$\frac{x + y}{2} = (1 - 30\%) * x$

$\frac{x + y}{2} = (1 - 0.30) * x$

$\frac{x + y}{2} = 0.70 * x$

$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

$1.40x - x = y$

$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

So, the average is:

$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

$Average =0.70 * 2.50y$

$Average =1.75y$

Rewrite as:

$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

This means that the average is 75% bigger than the second number

6 0

2 years ago

Show me how to do this

romanna [79]

Answer:

Step-by-step explanation:

The perimeter of the given triangle:

P = (2x + 1) + (x + 2) + (3x - 9) and P = 36 cm.

Therefore we have the equation:

2x + 1 + x + 2 + 3x - 9 = 36 combine like terms

(2x + x + 3x) + (1 + 2 - 9) = 36

6x - 6 = 36 add 6 to both sides

6x = 42 divide both sides by 6

x = 7

4 0

3 years ago

What is the area of this trapezoid?

oee [108]

Answer:

Step-by-step explanation:

8 0

3 years ago

What is 5(a-5b)(a+b)

Vaselesa [24]

Answer:

10a-20b

Step-by-step explanation:

5a-25b+5a+5b

10a-20b

5 0

3 years ago

Find m>X 21.04 22.62 67.38 68.96

valina [46]

Answer:

67.38 degrees

Step-by-step explanation:

Here, we want to find the value of the angle at X

We are going to use the appropriate trigonometric ratio here

From the question, the vertex X faces the side 12 and that makes the side the opposite

The side 13 faces the right angle and that makes it the hypotenuse

The trigonometric ratio that connects both is the sine

so we have that;

sine X = 12/13

X = arc sin (12/13)

X = 67.38

4 0

3 years ago