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MariettaO [177]
3 years ago
10

Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

Mathematics
1 answer:
alexandr402 [8]3 years ago
5 0
1. x=−y+8−z 2.x=−​7−4y−5z (everything over 4) ​​ 3.x=2−z 1.y=-x+8-z 1.z=-x+4-y 2.y=7+4x-5x (everything over 4) 2.z=7+4x-4y (everything over 5) 3.z=2-x
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Write a rule that tell how to use mental math to find the product 30,000 x 50,000​
tensa zangetsu [6.8K]

Answer:Step 1. Think of the basic fact. Multiply. 6  2  12

Step 2- Count the number of zeros in the factors.

                60 has 1 zero and

                     20 has 1 zero.

Step 3- Write that number of zeros to the right of The answer is 1,200.

the basic-fact product.

<h2>hope this helps have a awesome night/day❤️✨</h2>

Step-by-step explanation:

7 0
3 years ago
HELP ASAP ILL MARK U BRAINLIEST
prohojiy [21]

Answer: 300x200

Step-by-step explanation: First of all...Your perimeter equals 2x+3y. X=length, y=width.

2x+3y=1200

3y=1200-2x

y=400-(2/3)x

y=400-(2/3)x

Your Area = xy=x(400-2x/3)=400x-2^2/3

dA/dx=400-4x/3=0

4x/3=400

4x=1200

x=300ft length

y=400-(2/3)(300)=200ft

I hope this helps you!

3 0
3 years ago
How to find the legs of a right triangle with only the hypotenuse?
GuDViN [60]

Let x = legs of right triangle.

The set up would be:

x^2 + x^2 = (hypotenuse)^2

Understand?

8 0
3 years ago
I need help with this question can you help me
Debora [2.8K]

Answer:

28.26ft

Step-by-step explanation:

A=πr^2

π*3^2=28.27433

28.26

6 0
3 years ago
Write the following equation in slope-intercept form.<br> 1/3 - y+6=0
Radda [10]

Answer:

y=19/3

Step-by-step explanation:

4 0
3 years ago
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