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lesya692 [45]
3 years ago
11

Maria is playing a video game. She earns 15 points when she completes Level 1. Each time she completes a level, she earns twice

as many points as the previous level.
How many points will Maria earn when she completes Level 8?



Enter your answer in the box.
Mathematics
2 answers:
IgorC [24]3 years ago
7 0

Maria will earn 1,920 points

lions [1.4K]3 years ago
5 0
540 points,
15 points for the first, 30 for the second, 45, 60, 75, 90, 105, 120 for the eighth, added up it equals 540
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Find the discriminant and the number of real roots for this equation.
Margaret [11]

Our discriminant is 0 so, 4x^2 + 12x + 9 = 0 has one real root.

Option C is correct.

Step-by-step explanation:

we need to find the discriminant and the number of real roots for the following equation:

4x^2 + 12x + 9 = 0

The discriminant is found by using square root part of quadratic formula:

b^2-4ac

where b =12, a=4 and c=9

Putting values:

=b^2-4ac\\=(12)^2-4(4)(9)\\=144-144\\=0

To find out the number of real roots using discriminant we have following rules:

  • if discriminant b^2-4ac >0 then 2 real roots
  • if discriminant b^2-4ac =0 then 1 real root
  • if discriminant b^2-4ac <0 then no real roots

Since our discriminant b^2-4ac is 0 so, 4x^2 + 12x + 9 = 0 has one real root.

Option C is correct.

Keywords: discriminant

Learn more about discriminant at:

  • brainly.com/question/8196933
  • brainly.com/question/9328925
  • brainly.com/question/4853862

#learnwithBrainly

6 0
3 years ago
A first play of football game resulted in a loss of 12.5 yards. Then a penalty resulted in another loss of 5 yards. What is the
lions [1.4K]
The total loss is 17.5 yards.
8 0
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Leechtown Co. has 4.3% coupon bonds on the market with 18 years left to maturity. The bonds make annual payments. If the bond cu
oksian1 [2.3K]

Answer:

YTM = 5.45%

Step-by-step explanation:

Here, we are interested in calculating the yield to maturity.

Mathematically;

Annual coupon=1000*4.3%=43

YTM=[Annual coupon+(Face value-Present value)/time to maturity]/(Face value+Present value)/2

=[43+(1000-870)/18]/(1000+870)2

=5.45%

6 0
3 years ago
2-1<br> 3+2-<br> 9<br> 1<br> * 3|<br> 44<br> (+1)(0)<br> (98 9(<br> 2)
Katena32 [7]

Answer:64

Step-by-step explanation:

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Hi! Please help me and explain!
Orlov [11]

Distance formula sqrt((x2-x1)^2 + (y2-y1)^2))

Sqrt((4-2)^2+(-7+3)^2)

Sqrt(2^2+4^2)

Sqrt(4+16)

Sqrt(20)

2sqrt5.

The second choice is the correct answer.

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