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Snowcat [4.5K]
3 years ago
5

How do you do simultaneous equations by the method or substitution?​

Mathematics
1 answer:
ozzi3 years ago
5 0

Answer:

Here's the simplest example possible: let's say x + y = 3 and x - y = 1. Solve the second equation for x by adding y to both sides: (x - y) + y = 1 + y. So x = 1 + y. Take that value of x, and substitute it into the first equation given above (x + y = 3).

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A playground is rectangular with a length of 78 miles. If the area of the playground is 820 square miles, what is its width? Inp
Rudiy27

Answer:

10.5, 10\frac{1}{2}, or \frac{21}{2}

Step-by-step explanation:

To solve, you can use a variable (x) to represent the width.

The equation for area is A=L×W

So the Area is 820 and the length is 78.

820= 78w

Isolate the variable to solve.

w=10.5128....

If you round, it will be 10.5

10.5 as a fraction is 10\frac{1}{2} or \frac{21}{2}

8 0
2 years ago
If f(1)=6 and f(n)=f(n-1)+2 then find the value of f(4).
Brilliant_brown [7]
The answer would be to subtract
4 0
3 years ago
When the British began interfering with American trade and impressing their seamen, what war was declared?
hammer [34]
The Embargo act is all I know for this
5 0
3 years ago
Need answer to finish test
PilotLPTM [1.2K]

Answer:

D 30 but im not sure i would go with D tho

Step-by-step explanation:

it might also be a but im not sure sorry

7 0
3 years ago
I'm not sure how to simplify this expression with the exponents rules of multiplication
Vedmedyk [2.9K]
The rule of exponential multiplication is (a^x)*(a^y)=a^(x+y)
using this with your expression, we can do
(10^1)*(10^3)*(10^2)=10^(1+3+2)=10^6
Final answer:
10^6 or 1 million
Hope I helped :)
3 0
3 years ago
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