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svlad2 [7]
3 years ago
8

If 9x+2y2−3z2=132 and 9y−2y2+3z2=867, then x+y =

Mathematics
1 answer:
Phantasy [73]3 years ago
7 0
Looking at these two equations, you need to cancel out the variables with powers and the z. This can be simply done by adding them.

9y-2y^2+3z^2=867
+
9x+2y^2-3z^2=132
-----------------------------
9y+9x=999

Factor the 9 out of the left side.
9(x+y)=999
x+y=111

The answer is C (111).

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The mold for a cone has diameter of 4 inches and is 6 inches tall what is the volume of the cone mold to the nearest tenth
Nesterboy [21]
The formula for the volume of a cone is
v = ( 1 / 3) h pi r^2
where h is the height of the cone
pi is 3.1416
r is the radius of the cone

since diameter is given
D = 2r
r = D/2 = 4/2 = 2 in

substitute the given
V = (1/3) (6) (3.1416) (2^2)
V = 25.1 cubic in
6 0
3 years ago
The graphed line shown below is y=-3x+6...Which equation, when graphed with the given equation, will form a system that has no s
trasher [3.6K]

Answer:

The equation, when graphed together with the line y=-3x +6, which will form a system of equations with no solution is y=-3(x +6), meaning the second option on the picture.

Step-by-step explanation:

hope this helps!

6 0
2 years ago
Please help. Answer only if u can show your work or explain
Elenna [48]
Gropu like terms
(-1/2)x+(3/2)x-4x+3+5=
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3 0
2 years ago
Read 2 more answers
HELP PLS !!<br><br> Make y the subject in the formula x = 5y – w.
NARA [144]

Answer:

y=x+w/5

Step-by-step explanation:

x=5y-w

step 1: bring the additional letters/numbers next to the "5y" over to the left

x+w= 5y

step 2: divide the numbers and letters on both sides of the "=" by 5 to only get the letter y

x+w/5= y

step 3: swap them over

y= x+w/5

(we can't get an answer from x+w/5 because the terms are unlike, therefore we keep it as a fraction

8 0
2 years ago
What is 3 1/8 x 2 3/5
Lisa [10]

Answer:

8\frac{1}{8}

Step-by-step explanation:

3\frac{1}{8} \times 2 \frac{3}{5}

=\frac{25}{8} \times \frac{13}{5}

=\frac{25\times13}{8\times5}

=\frac{325}{40}

=\frac{325/5}{40/5}

=\frac{65}{8}

=8\frac{1}{8}

Hope this helps :)

3 0
3 years ago
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