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Softa [21]
2 years ago
12

Use technology, what is the solution to this system? 4x+8y=30

Mathematics
1 answer:
yarga [219]2 years ago
7 0

Answer:

y=-1/2x+15/4

Step-by-step explanation:

transfer the equation into slope intercept form. subtract 4x from each side getting 8y=-4x+30 then divide by 8.

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Eight children were in a ballet class. Three of them were wearing a pink leotard. What fraction of them did not have a pink leot
leva [86]

Answer:

5/8

Step-by-step explanation:

8 children in class

3 have pink on

8-3 = 5

That means 5 do not have pink

Fraction that do not have pink

those that do not have pink/total

5/8

5 0
3 years ago
Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.
ycow [4]

This  involves quite a lot of arithmetic to do manually.

The first thing you do is to make the first number in  row 2  = to 0.

This is done by R2 = -3/2 R1 + R2

so the matrix becomes

( 2        1          1)    ( -3 )

( 0    -13/2   3/2)   (1/2 )

(5       -1           2)  (-2)

Next step is to make  the 5 in row 5  = 0  

then  the -1  must become zero

You aim  for the form

( 1 0 0) (x)

(0 1 0) (y)

(0 0 1) ( z)

x , y and z will be the required solutions.


4 0
3 years ago
Read 2 more answers
Find the cosine of ∠T.
Ostrovityanka [42]

ANSWER: ∠T = 32.4°

Remember the formula for the basic trig functions: SOH CAH TOA

Since you want to find cosine for <T, you need the adjacent side length as well as the hypotenuse's length which can be found using the Pythagoras's Theorem  a^2+b^2=c^2 with <em>a </em> and <em>b</em> being the side lengths and <em>c</em> being the hypotenuse.

Using the theorem, we get c=37

Now use the cosine formula to get <T = 12/37  to get the final answer.

4 0
3 years ago
If anyone knows how to solve this I’d really appreciate it :)
ratelena [41]
The correct answer is C) 71 
7 0
3 years ago
X + 5 = 75<br> Solve for the variable
IgorLugansk [536]

First, isolate the variable

X+0=75-5

X+0=70

X=70

Hope I helped!

Good Luck!


7 0
3 years ago
Read 2 more answers
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