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Rudiy27
2 years ago
11

HELP ME ITS SO EASY BUT I NEED HELP

Mathematics
1 answer:
Naddika [18.5K]2 years ago
5 0

Answer:

7.2111(4 decimal places)

Step-by-step explanation:

a squared by b squared=c squared

36 + 16 is 52, so then you need to square root 52 which is 7.2111 to 4 decimal places. I hope you benefit from this. Cheers

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What is the solution to the system? 1. 5 x -4 y -3 z =3, 2. x + y -z =0, 3. x = 3 y + 1? I haven't done this kind of math. I am
JulijaS [17]

(1) 5 x -4 y -3 z =3

(2) x + y -z =0

(3) x = 3 y + 1

We can use substitution, when we take the equation x = 3 y + 1, and substitute x in the equations (1) and (2) by 3y+1.

(1) 5 x -4 y -3 z =3

5(3y+1) -4 y -3 z =3 ---> 15y+5-4y-3z=3 -----> 11y - 3z = - 2 (4)

(2) x + y -z =0 -----> (2) (3y + 1) + y -z =0 -----> 4y - z+1 ----> z= 4y+1 (5)

Now, we can take the equation (5) and substitute the value of (z) into the equation (4).

(4) 11y - 3z = - 2

(5) z= 4y+1

(6) 11y - 3z = - 2 ---> 11y - 3(4y+1) = - 2 --->11y -12y -3 = -2 ---> -y= 1----> y= - 1

Take the equation (5) , and now we know y = - 1.

(5) z= 4y+1 =4*(-1)+1 = -4 +1= - 3, ----> z= - 3

Take the equation (3), and we know that y = - 1,

x = 3 y + 1 = 3*(-1) + 1 = -3 +1 = -2, x = -2.

So, x = - 2, y = - 1, z = - 3.


Check:

(1) 5 *(-2) -4*(-1) -3*(-3) =3 ---> -10+4+9=3---> 3=3

(2) (-2) + (-1) -(-3) =0 ---> -2-1+3=0 ----> 0=0

(3) (-2) = 3*(-1) + 1 ----> -2=-3+1 ---> -2 = -2

7 0
3 years ago
Please help! 20 points thanks :)
Irina18 [472]
The answer is D (5/4). We go up by 5 and to the side we go 4 in order to get between the points (0,8) and (-4,3). We know it’s rise over run. The rise is 5 because we go up by 5 and the run is 4 because we go to the side 4 times. By looking from left to right at the line, we see it’s a going to be positive. This means the answer is 5/4.
7 0
2 years ago
Read 2 more answers
Given f(x) = 3x + 4 and g(x) = 8x + 1<br> then what is ( f + g )(0))?
alexandr1967 [171]
(f+g)(x)=f(x)+g(x)

(f+g)(x)=3x+4+8x+1

(f+g)(x)=11x+5

(f+g)(0)=11(0)+5

(f+g)(0)=0+5

(f+g)(0)=5
7 0
3 years ago
Letter C need help on 6-11
mamaluj [8]
3/6 divide numerator and denominator by 3 and get 1/2
12/20 divide the numerator and denominator by 2 ,and get 6/10 divide by 2,and get a final answer of 3/5.
8/24 divide the numerator and denominator by 8 ,and get 1/3.
30/40 divide the numerator and denominator by 10 ,and get 3/4

I hope this helps you,and good luck.
3 0
3 years ago
Read 2 more answers
Please help me with this problems.Thanks.
almond37 [142]
Hi!
Alrighty, so there are 5 sets of 50 in 250 (250 divided by 50), so just take 50 times 12 and get 60! Hope that helped :)
7 0
3 years ago
Read 2 more answers
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