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3 years ago

13

In the triangle below, what is the tangent of 45°?

2 answers:

lana [24]3 years ago

7 0

Answer:

C. 1.

Step-by-step explanation:

Tan 45 = opposite / adjacent side

= 1/1

= 1.

Lana71 [14]3 years ago

6 0

Answer:

C

Step-by-step explanation:

tan45° = $\frac{opposite}{adjacent}$ = $\frac{1}{1}$ = 1

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Graph thee line that represents this equation:<br>y+2=1/2(x+2)

Yuliya22 [10]

Answer:

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

Explanation:

The first pic shows the line graphed, while the second pic shows how to turn the equation into proper slope-intercept form.

The only steps the second pic is missing however, is flipping the sides around to be better understood (optional), and more importantly subtracting 2 on both sides in order to move it to the other side, to get 2y = x - 2. And dividing the 2 on both sides to get y by its self, to get:

y = (x-2)/2 , or y = 1/2 x - 2/2 , which if you notice 2/2 makes it equal to one whole so your answer is y = 1/2 x - 1 .

If you like this answer can you please mark me brainliest? :)

6 0

2 years ago

Using the quadratic formula to solve x2 = 5 – X, what are the values of X?

anygoal [31]

Answer:

$A)\:x=\frac{-1\pm\sqrt{21}}{2}$

Step-by-step explanation:

$x^2=5-x$

<u>Add x from both sides:</u>

$\longmapsto$ $x^2+x=5-x+x$

$\longmapsto$ $x^2+x=5$

<u>Subtract 5 from both sides:</u>

$\longmapsto$ $x^2+x-5=5-5$

$\longmapsto$ $x^2+x-5=0$

Now, we'll use the quadratic formula to solve this problem: $x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$\longmapsto$ $x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\times \:1\cdot \left(-5\right)}}{2\times \:1}$

$\longmapsto$ $\sqrt{1^2-4\times \:1\times \left(-5\right)}$

$\longmapsto$ $1^2=1$

$\longmapsto$ $\sqrt{1+4\times \:1\times \:5}$

<u>Multiply 4*1*5= 20</u>

$\longmapsto$ $\sqrt{1+20}$

<u>Add 1 and 20= 21</u>

$\longmapsto$ $\sqrt{21}$

$\longmapsto$ $x_{1,\:2}=\frac{-1\pm \sqrt{21}}{2\times \:1}$

$\longmapsto$ $x_1=\frac{-1+\sqrt{21}}{2\times \:1}$

$\longmapsto$ $\frac{-1+\sqrt{21}}{2\times \:1}$

<u>Multiply 2 and 1= 2</u>

$\longmapsto$ $\frac{-1+\sqrt{21}}{2}$

$\longmapsto$ $x_2=\frac{-1-\sqrt{21}}{2\times \:1}$

$\longmapsto$ $\frac{-1-\sqrt{21}}{2\times \:1}$

<u>Multiply 2 and 1= 2</u>

$\longmapsto$ $\frac{-1-\sqrt{21}}{2}$

$\longmapsto$ $x=\frac{-1+\sqrt{21}}{2},\:x=\frac{-1-\sqrt{21}}{2}$

$\hookrightarrow$ $x=\frac{-1\pm\sqrt{21}}{2}$

________________________

4 0

2 years ago

An electrician charges $45 per hour plus a fixed charge of $30

babymother [125]

45x+30= price for electrician when x= hours

6 0

2 years ago

Can people please help me on this

PtichkaEL [24]

the answer will be D

5 0

2 years ago

What is 7.0717 million in figures. ?

Brrunno [24]

7.0717 million

Lets see:

1 million = 1.000.000

So, 7.0717 million = 7.071.700

7.071.700 can be read as "seven million seventy one thousand and seven hunred"

If you wanna split it you can split in

seven million = 7 million

seventy one thousand = 71 thousand

seven hundred = 7 hundred

8 0

2 years ago