All categories

3 years ago

PLS HELP IM DESPARATE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

ser-zykov [4K]3 years ago

7 0

Answer:

x = 30 degrees

Step-by-step explanation:

Those are complementary angles, which means they add up to 90 degrees

2x + x is 3x

To find x you have to divide 90 by 3

x equals 30

2x = is 60

Hope this helps :)

jeka57 [31]3 years ago

4 0

Answer:

x=30°

2x=60°

Step-by-step explanation:

Value of x°=x°/(2x°+x°)×90°

= 1/3×90°

=30°

Value of 2x°=30°×2

=60°

You might be interested in

Please help me solve this step by step ASAP please

Alex_Xolod [135]

Y=130 hope this helps
Step by step:
If y =10 when x =4 then
y=130 when x= 52 because it it multiplied by 13 4*13=52 then 10*13=130

6 0

4 years ago

Carlos and Maria drove a total of 191 miles in 3.8 hours. Carlos drove the first part of the trip and averaged 49 miles per hour

Lady bird [3.3K]

<span>Maria drove for 1.6 hours.</span>

4 0

3 years ago

Read 2 more answers

What is the solution to the following system?

leva [86]

Answer:

(4,3,2)

Step-by-step explanation:

We can solve this via matrices, so the equations given can be written in matrix form as:

$\left[\begin{array}{cccc}3&2&1&20\\1&-4&-1&-10\\2&1&2&15\end{array}\right]$

Now I will shift rows to make my pivot point (top left) a 1 and so:

$\left[\begin{array}{cccc}1&-4&-1&-10\\2&1&2&15\\3&2&1&20\end{array}\right]$

Next I will come up with algorithms that can cancel out numbers where R1 means row 1, R2 means row 2 and R3 means row three therefore,

-2R1+R2=R2 , -3R1+R3=R3

$\left[\begin{array}{cccc}1&-4&-1&-10\\0&9&4&35\\0&14&4&50\end{array}\right]$

$\frac{R_2}{9}=R_2$

$\left[\begin{array}{cccc}1&-4&-1&-10\\0&1&\frac{4}{9}&\frac{35}{9}\\0&14&4&50\end{array}\right]$

4R2+R1=R1 , -14R2+R3=R3

$\left[\begin{array}{cccc}1&0&\frac{7}{9}&\frac{50}{9}\\0&1&\frac{4}{9}&\frac{35}{9}\\0&0&-\frac{20}{9}&-\frac{40}{9}\end{array}\right]$

$-\frac{9}{20}R_3=R_3$

$\left[\begin{array}{cccc}1&0&\frac{7}{9}&\frac{50}{9}\\0&1&\frac{4}{9}&\frac{35}{9}\\0&0&1&2\end{array}\right]$

$-\frac{4}{9}R_3+R_2=R2$ , $-\frac{7}{9}R_3+R_1=R_1$

$\left[\begin{array}{cccc}1&0&0&4\\0&1&0&3\\0&0&1&2\end{array}\right]$

Therefore the solution to the system of equations are (x,y,z) = (4,3,2)

Note: If answer choices are given, plug them in and see if you get what is "equal to". Meaning plug in 4 for x, 3 for y and 2 for z in the first equation and you should get 20, second equation -10 and third 15.

7 0

4 years ago

HELP MEEEEEEEEEEEEEEEEEE

const2013 [10]

Answer:

$- 8 {x}^{2} - x - 4$

Step-by-step explanation:

Let's subtract:

$( - 8 {x}^{2} - 8) - (x - 4)$

$- 8 {x}^{2} - 8 - x + 4$

$- 8 {x}^{2} - x - 4$

6 0

2 years ago

Simplify the expression completely.

ivolga24 [154]

You can’t simplify it any further. 288 1/4 is already simplified.

6 0

3 years ago

Read 2 more answers