All categories

3 years ago

Quick anyone know the answer?

Mathematics

1 answer:

den301095 [7]3 years ago

8 0

The sum of the measures of angles in all quadrangles is 360 °. Therefore:

$(25x+1)+(25x-2)+(20x-1)+82=360\\\\70x+80=360\ \ \ |-80\\\\70x=280\ \ \ |:70\\\\x=4$

$m\angle D=(20x-1)^o\to m\angle D=(20\cdot4-1)^o=79^o\\\\Answer:\ B.\ 79^o$

You might be interested in

In the graph above, what's the distance between (5, –2) and (5, 3)?

SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

To find the distance between two points, subtract the two values and find the absolute value. So in this question, our equation would be |-2-3| which equals |-5| which then solves to 5.

8 0

3 years ago

2x + 3/ x - 4 - 2x - 8/ 2× + 1 = 1

Debora [2.8K]

$\dfrac{2x+3}{x-4}-\dfrac{2x-8}{2x+1}=1\ \ \ |the\ domain\ D:x\neq4\ and\ x\neq-\dfrac{1}{2}\\\\\dfrac{(2x+3)(2x+1)}{(x-4)(2x+1)}-\dfrac{(2x-8)(x-4)}{(2x+1)(x-4)}-1=0\\\\\dfrac{4x^2+2x+6x+3}{2x^2+x-8x-4}-\dfrac{2x^2-8x-8x+32}{2x^2+x-8x-4}-\dfrac{2x^2+x-8x-4}{2x^2+x-8x-4}=0\\\\\dfrac{4x^2+8x+3}{2x^2-7x-4}-\dfrac{2x^2-16x+32}{2x^2-7x-4}-\dfrac{2x^2-7x-4}{2x^2-7x-4}=0\\\\\dfrac{4x^2+8x+3-2x^2+16x-32-2x^2+7x+4}{2x^2-7x-4}=0\\\\\dfrac{31x-25}{2x^2-7x-4}=0\iff31x-25=0\\\\31x=25\\\\\boxed{x=\frac{25}{31}}$

6 0

3 years ago

A letter is chosen from the word 'brilliant'. Determine the probability that it will be: Give your answers in their lowest terms

pychu [463]

Answer:

Step-by-step explanation:

brilliant has 9 letters

brilliant has 1 B (1/9)

brilliant has 1 R (1/9)

brilliant has 2 I's (2/9)

brilliant has 2 L's (2/9)

brilliant has 1 A (1/9)

brilliant has 1 N (1/9)

brilliant has 1 T (1/9)

6 0

3 years ago

Whats the answer too this 2(3+2×5)÷2?<br>

icang [17]

Answer:

Step-by-step explanation:

Use PEMDAS

2(3+2x5)÷2

first you would do the parenthesis

2 times 5 is 10

so now you have:

2(3+10)÷2You still have parenthesis so you would add 3+10 because that is inside the parenthesis

2(13)÷3

next you would do 2 times 13 which is 26:

so now you have 26÷2 which is 13

so the answer is 13

4 0

3 years ago

Read 2 more answers

Aubrey runs the 100-meter dash in 14.895 seconds What words could you use to write to read 14.895

Kamila [148]

Fourteen point eight hundred ninety-five

7 0

4 years ago

Read 2 more answers