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1 year ago

I need help with my math

Mathematics

1 answer:

REY [17]1 year ago

7 0

EXPLANATION

Applying the sum of interior angles theorem give us the following relationship:

60 + 3x + (x+20) = 180

Removing the parentheses:

60 + 3x + x + 20 = 180

Adding like terms:

80 + 4x = 180

Subtracting -80 to both sides:

4x = 180 - 80

Subtracting numbers:

4x = 100

Dividing both sides by 4:

x = 100/4

Simplifying:

x = 25

Then, the missing angles are:

25 + 20 = 45 degrees

3*25 = 75 degrees

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Evaluate the following at select the best answer 8 (3 exponent seven) minus (6 + 4) 2

photoshop1234 [79]

Answer:

17476

Step-by-step explanation:

8( $3^{7}$ )-(6+4)2

8(2187)-(10)2

17496-20

17476

3 0

3 years ago

Please help due in 10 min will mark brainliest

nlexa [21]

Answer:

Option D will be your answer

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hope it helps..

have a great day!!

7 0

3 years ago

the number of rainbow smelt in Lake Michigan had an average rate of change of −19.76 per year between 1990 and 2000. The bloater

Nataly_w [17]

Initial population of rainbow smelt: 227.
Initial population of bloater fish: 1,052.
t - number of the years;
The equation is:
227 - 19.76 t = 1,052 - 92.57 t
92.57 t - 19.76 t = 1,052 - 227
72.81 t = 825
t = 825 : 72.81
t = 11.33 years = 11 1/3 years = 11 years 4 months
Answer: After 11 years and 4 months.

5 0

3 years ago

Read 2 more answers

Tell whether each statement about a function of the form f(x) = ax2 is always true, sometimes true, or never true.

DaniilM [7]

Answer:

Step-by-step explanation:

3 0

3 years ago

A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D

Alika [10]

The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b.

So that means the side lengths are a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

$(y\times a)\times (y\times b)=9x$
$y^2ab=9x$
$y^2x=9x$
$y=3$

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is $5 \times 8=40$

And so then $x=40$

And then after the dilation, it would be $9x=9(40) = 360$

We could check it another way too. Since we said the scale factor is 3, then:

$( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360$

So basically 15 by 24 is the new dimensions :)

6 0

3 years ago