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2 years ago

А 65° B 45° 70°answer this for me please

Mathematics

1 answer:

nikklg [1K]2 years ago

7 0

Answer:

"With the high level of interest in our 45-70

Step-by-step explanation:

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5. AC bisects Angle BAD. Find the measure of angle BAC.

alukav5142 [94]

If AC bisects < BAD, it means it cuts it into 2 equal parts

so < BAC = < CAD

3x + 12 = 5x
12 = 5x - 3x
12 = 2x
12/2 = x
6 = x

< BAC = 3x + 12.......3(6) + 12 = 30 degrees <===

6 0

2 years ago

A positive real number is 2 less than another. When 4 times the larger is added to the square of the smaller, the result is 49.

Kobotan [32]

Answer:

The numbers are

$-2+3\sqrt{5}$ and $3\sqrt{5}$

Step-by-step explanation:

Let

x -----> the smaller positive real number

y -----> the larger positive real number

we know that

A positive real number is 2 less than another

$x=y-2$

$y=x+2$ ----> equation A

When 4 times the larger is added to the square of the smaller, the result is 49

$4y+x^2=49$ ----> equation B

substitute equation A in equation B

$4(x+2)+x^2=49$

solve for x

$x^2+4x-41=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+4x-41=0$

$a=1\\b=4\\c=-41$

substitute in the formula

$x=\frac{-4\pm\sqrt{4^{2}-4(1)(-41)}} {2(1)}$

$x=\frac{-4\pm\sqrt{180}} {2}$

$x=\frac{-4\pm6\sqrt{5}} {2}$

$x=-2\pm3\sqrt{5}$

The positive real number is

$x=-2+3\sqrt{5}$

Find the value of y

$y=x+2$

$y=-2+3\sqrt{5}+2$

$y=3\sqrt{5}$

6 0

3 years ago

Help!!! Please help

Flauer [41]

It's blurry on my screen please take it closer

8 0

3 years ago

Read 2 more answers

Four people have measured the height of a wall using different methods. Their results are shown in the table. Order their measur

slavikrds [6]

Answer:

5/2, 2.6, 1 + sqrt(3), sqrt(8)

Step-by-step explanation:

Use a calculator:

sqrt(8) = 2.83

5/2 = 2.5

2.6 = 2.6

1 + sqrt(3) = 2.73

Answer:

5/2, 2.6, 1 + sqrt(3), sqrt(8)

3 0

3 years ago

A theater has 1200 seats. each row has 20 seats. write and solve an equation to find the number xx of rows in the theater. an eq

hammer [34]

The equation is 20x = 1200
x=1200÷20
x=60 rows

5 0

2 years ago

А 65° B 45° 70°answer this for me please​

А 65° B 45° 70°answer this for me please