You can use the following equation:
10h+3p+0.5r=100
This equation uses “h” “p” and “r” to represent the number of animals bought, each variable having a coefficient which is that animal's price. The right side is the total price.
You will now need a second equation so you can proceed to substitution/elimination:
h+p+r=100
This equation, using the same variables, represents the total number of animals to be bought.
We can eliminate the “h” variable by multiplying the bottom equation by -10, you now have the following:
10h+3p+0.5r=100
-10h-10p-10r=-1000
Add down and the result is:
-7p-9.5r=-900
You can set up a proportion
-9.5r=-900+7p
r=(-900+7p)/-9.5
And substitute in the original equation…
P.S. I challenge you to figure out the rest on your own because it is really just a tedious process of substitution and elimination from here and my phone is about to die. I'll check in later if you're still having problems.
Answer:
the answer is First 2 to the power of 2 multiplied by 1 whole over 7, the whole cubed. = 2 to the power of 5 multiplied by 1 cubed over 7 cubed. = 32 over 343.
hope it helps!
Answer:
x=3 and y=−4
Step-by-step explanation:
Solve4x+y=8for y:
4x+y=8
4x+y+−4x=8+−4x(Add -4x to both sides)
y=−4x+8
Step: Substitute−4x+8 for y in 5x+2y=7:
5x+2y=7
5x+2(−4x+8)=7
−3x+16=7(Simplify both sides of the equation)
−3x+16+−16=7+−16(Add -16 to both sides)
−3x=−9
-3x/-3=-9/-3
(Divide both sides by -3)
Step 2: Substitute 3 for x in y=−4x+8:
y=−4x+8
y=(−4)(3)+8
y=−4(Simplify both sides of the equation)
Answer:
No,
12.8 = 12.800
Obviously, 12.800 <u>< </u>12.815.
The use of grouping symbols in math shows us which part of the problem or expression should be done first. Brackets, braces and parentheses are common grouping symbols used in mathematics. If no symbol is shown between brackets, forexample, (3+7)(8+1) it means that you should multiply after simplifying the operations inside the brackets.