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I need help with 4 problems like this...KHAN ACADEMY.

9514 1404 393

Answer:

Step-by-step explanation:

Start by getting the x-terms on one side of the equal sign. We can do that by subtracting x from both sides.

  3 = x² +2x

Now, add the square of half the x-coefficient.

  3 +1 = x² +2x +1

  (x +1)² = 4 . . . . . . . . write as a square in the desired form

__

To solve, take the square root, and add the opposite of the left-side constant.

  x +1 = ±2

  x = -1 ±2 . . . . . . matches choice (D)

Let’s say you want to play a new card game called Pokee. Every player is dealt 4 cards and everyone compares what hands they have to see who wins. Our job is to figure out what the hierarchy of the hands should be. Below is a list of several scoring hands that we wish to compare. For each hand, count how many hands of that type there are (include the expression you used to get that value) along with a simple explanation of how you got that expression. Assume a standard 52 card deck with 4 suits.
a) Presidential Flush (J, Q, K, Ace, all the same suit)
b) Straightish (4 consecutive cards)
c)Flushed (4 cards of the same suit)
d) House (Two pairs of different cards)

What is the probability of rolling an even number when rolling a 6-sided die?
A)
3
B)
1
2
C)
D)
AP

Rosa earned a total of $34 by selling 17 cups of lemonade. How many cups of lemonade does Rosa need to sell in all to earn $46? Assume the relationship is directly proportional.

PLSS HELP IMMEDIATELY!!!! ILL MARK BRAINIEST IF U DONT LEAVE A LINK OR GUESS!!!!!

Jeremy bought a $60 pair of sneakers on sale for 15% off. Then, he used a coupon that gave him an additional 10% off. Can Jeremy find the cost of the sneakers by adding the percents? Justify your answer:

-by finding 25% off of $60, and

-by finding 15% off of $60, and then subtracting 10% from that cost.


Use the drop-down menus to complete your explanation.

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Jeremy cannot/ can find the cost by adding the percents.

.

25% off of $60 is equal to $45.00/35.00/25.00/45.90

.

15% off of $60, then subtracting 10% from that cost is equal to 35.00/25.00/38.25/45.90...

.

The two total costs are equal/not equal



can someone help me solve this question pls?

answer for brainlest and 10 points

PLS ANSWER THE QUESTION

To solve the system of linear equations 8x+ by - 18 and 6x+y=-2 by using the linear combination method, Amos decided that he should first multiply the second equation by -5 and then add the two equations together to eliminate the y terms. His

calculations are as shown. Amos’s solution is (2,-14). What did he do wrong?

Is y=(x-6) 2 to the second power linear fraction or nonlinear fraction

solve for x PLEASE HELP

please help ill give brainiest answer

determine the volume of the rectangular prism that is 7.3 centimeters by 8.5 centimeters by 4.2 centimeters​

Can someone pleaseeee help and if you’re correct i’ll give brainliest

Calculate the volume of the composite figure. Round to the nearest tenth, if necessary.

In the year 1900, the total number of metric tons of copper purchased in the world was 495,000. Each year since 1990,
the total number of metric tons of copper production has increased on average by 3.25%. Which function models the
total number of metric tons produced, y, for x years since 1990?
А
c(2) = 495.000,20.9675
cc() = 495, 000(1.0325)*
B.
C(2) = 495,000...1.0325
D
c(2) = 495,000(0.9675)

A local ice cream shop wants to see if they should promote a new swizzleberry swirl or creamsicle flavored drink. In order to determine which one to promote, they took a sample of 80 patrons and asked them to choose which they preferred. The one that is significantly preferred over the other (at a .05 level of significance) will be promoted. It is expected that an equal number of patrons will choose each flavor. Based on the observed frequencies given below, what is the decision for this test

For each journey between work and home, Toyin uses 1.2 gallons of petrol. Toyin has 34 litres of petrol in her car. How many complete journeys between work and home can she do?
1 gallon = 4.5 litres.​

2x + 4y = 12
3x + 6y = b
in the given system of equations, b is a constant. If the system has infinitely many solutions, what is the value
of b?
A 3
B 6
C 12
D
18

Where is the blue dot on the number line?

Is this quadratic?
(0, 6), (1, 12), (2, 20), (3, 30)

Find the value of x.

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what is 1+1 just cause

The volume V of a cone varies jointly as the area of the base B and the height
h. V = 32 cm, when B = 16 cm2 and h = 6 cm. Identify h when
V = 60 cm3 and B = 20 cm2.

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-10 = 0v
a. no solution
b. infinite solution

The coach of a baseball team counts 240 males and n females in the bleachers. She determines that 80% of the male and female spectators are fans of the home team. The coach writes an expression 0.80n + 192 to represent the number of home team fans. Is the coach correct?

how do you solve 27.5% of 88

Clarissa had a strip of leather that was n yards long. She cut the strip into pieces that were each 1/4yard long, with no leather left over. She used all of the pieces and made 9 bracelets. Which equation represents this situation?

Select the correct answer. Which expression simplifies to 8x5?