<span>(-y + 5a - 4) + (-3y - a - 5)
= 5a-a-y-3y-4-5 <---- Group like terms
= 4a-y-3y-4-5 <---- Add similar elements
= 4a-4y-4-5 <---- Add similar elements (cont.)
= 4a-4y-9
</span>
90. For the first position,you can have one of 10 ppl in president/vice president. Then the remaining 9 ppl can be put in the remaining position. 10 * 9 = 90. If you need more explantion check these keywords. Factorial, permutations, combinations.
Answer:
She didn't do the multiplication of 7 times the fraction 5/8 by using distributive property.
so the correct answer is the one that looks like:
Seven was not multiplied by StartFraction 5 over 8 EndFraction.
in your list of options.
Step-by-step explanation:
If one has a stack of seven books each 
thick, one should first convert the mixed number to an addition of an integer plus a fraction
as she did, and then multiply 7 by the addition, making sure to use distributive property and multiply both terms:
and she didn't do the multiplication of 7 times the fraction 5/8
<u> 30a² </u> <u> 42a³ </u> <u> 54a³b </u>
2 · 3 · 5 ·× a · a<u /> 2 · 3 · 7 · a · a · a 2 · 3 · 3 · 3 · a · a · a · b
GCF = 2 · 3 · a · a
GCF = 6a² <u />
C = 220T + 1890.
Solve the equation for T.
220T = C - 1890
T = C/220 - 8.6
The steel produced is expected to be sold at a price of $310 per ton.
310 $/ton is a rate or slope. Write a linear equation where x is tons of steel produced and y is selling price of the steel.
y = 310x
Write and solve an equation to find the amount of steel produced if the selling price is equal to the cost of production.
* Here, note that the cost of production and tons of steel in the first equation is in the millions. The equation we just wrote for the selling price was in x tons of steel. This only matters in regards to the units you specify because; million/million = 1
The unit multiplier of all variables must be specified as same. Either everything is in millions or not.
Here, I'll leave everything in millions, change x (tons of steel) to T (mill tons steel) and "y" to "S" in million dollars selling price.
S = 310T
Set equal to Cost equation.
220T + 1980 = 310T
Solve for T, million tons of steel produced.
1980 = 310T - 220T
1980 = 90T
T = 1980/90
T = 22 million tons steel produced
