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Anastasy [175]
3 years ago
12

2x^2-20x+100 quadratic formula

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
7 0

Answer:10

Step-by-step explanation:

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Find the z score that cuts-off the largest 9% under the standard normal curve. a) -1.34 b) 1.34 c) 0.536 d) 1.28
topjm [15]

Answer:

b) 1.34

Step-by-step explanation:

The z score is used to determine the number of standard deviations by which the raw score is above or below the mean. If the z score is positive then the z score is above the mean while for a negative z score implies that it is below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma}

For the largest 9%, the score is 100% - 9% = 91% = 0.91

From the normal distribution table, the z score that corresponds to 0.91 is 1.34

4 0
3 years ago
Solve: 3^x+1 + 3^x= 108​
mash [69]

Answer:

x = 3

Step-by-step explanation:

{3}^{(x + 1)}  +  {3}^{x}  = 108 \\  \\  {3}^{x} .3 +  {3}^{x}  = 108 \\  \\  {3}^{x} (3 + 1) = 108 \\  \\  {3}^{x} (4 )= 108 \\  \\  {3}^{x}  =  \frac{108}{4}  \\  \\  {3}^{x}  = 27 \\  \\  {3}^{x}  =  {3}^{3}  \\  \\ \implies x = 3

5 0
3 years ago
One pound of feathers would be easier weighing than one pound of iron
Lina20 [59]
They weigh the same --- One pound.

One pound of feathers = One pound of iron
8 0
4 years ago
Read 2 more answers
Frank mary and seth shared some sweets in the ratio 4:5:7 seth got 18 more sweets than frank
Nimfa-mama [501]

Answer:

each number in the ratio 4:5:7 is worth 6 sweets. add 4,5, and 7 to get 16 then multiply it by 6 to get 96 sweets.

Step-by-step explanation:

add the ratios = 4+5+7= 16

1 number = 6 so

4x6= 24

5x6=30

7x6=42

Frank gets 24 sweets

Mary gets 30 sweets

Seth gets 42 sweets

The total number of sweets they shared is 24+30+42= 96

The share 96 sweets altogether.

The check your answer; do 42-24= 18

Therefore, now we know that the difference between Seth and Frank's amount of sweets is 18.

Therefore, this is correct.

5 0
3 years ago
Given
vesna_86 [32]
The answer is B. Use the u.s rule to solve the balance after payments for the 100th and 180th
3 0
3 years ago
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