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yarga [219]
3 years ago
5

Perform the indicated operations. Write answer in descending order.

Mathematics
1 answer:
Leona [35]3 years ago
8 0
5a-11b -11b+5a final answer
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What is the solution set of y=2x^2+8x and x-2.23y+10.34=0
trasher [3.6K]
First, let's put the second equation, <span>x-2.23y+10.34=0, in terms of y:
x - 2.23y +10.34 = 0   
2.23y = x + 10.34
y =  .45x + 4.64
Now we can substitute the right side of this equation for y in the first equation
</span><span>y=2x^2+8x
.45x + 4.64 = 2x^2 + 8x
Turn it into a quadratic by getting 0 on one side:
2x^2 + 8x - .45x - 4.64 = 0
2x^2 + 7.55x - 4.64 = 0 Divide both sides by 2
x^2 + 3.76x - 2.32 = 0
x =( -b +/- </span>√(b² - 4ac) ) / 2a
x =( -3.76 +/- √(14.14 + 9.28)) ÷ 2
x = .54 or -4.31

Plug the x values into y = .45x + 4.64
y = .45 (.54) + 4.64
y = 4.88 when x= .54

y = .45 (-4.31) + 4.64
y = 2.70 when x= -4.31

Solution set:
{ (0.54, 4.88) , (-4.31, 2.70) }
8 0
3 years ago
What are the rules for multiplying negative integers​
Sergeeva-Olga [200]

Answer:

Negative time a negative equals a positive!

Step-by-step explanation:

When you multiply two negative numbers or two positive numbers then the product is always positive. The same also goes for dividing negative integers.

7 0
3 years ago
Read 2 more answers
A card is drawn from a standard deck of
Gala2k [10]

Step-by-step explanation:

Total number of outcomes = 52 , since each deck consists of 52 cards

probability = Number of favorable outcomes/ Total number of outcomes

a) Number of favorable outcomes = Number of club cards = 13

P(club) =13/52 = 1/4

b) Number of favorable outcomes = Number of red cards = 26

P(red card) = 26/52 = 1/2

c) Number of favorable outcomes = Number of cards that are not hearts = 39/52 = 3/4

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3 years ago
Evaluate the function, find f(-2):<br> f(x) = 2x^2 +3x
miss Akunina [59]

Answer:

B) 2

Step-by-step explanation:

f(-2) = 2 * (-2)^2 + 3(-2)

f(-2) =  2 * 4 - 6

f(-2) = 8 - 6

f(-2) = 2

3 0
3 years ago
20 question ach containing three answers quiz probability of getting no points? worksheet
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The probability of getting no points on any given question is 2/3, so for 20 independent questions, it is (2/3)^20 ≈ 3.007*10^-4.
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