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Yanka [14]
2 years ago
15

#72 i will give brainliest to the best answer!​

Mathematics
1 answer:
Zarrin [17]2 years ago
4 0

Step-by-step explanation:

Select all of the following that are quadratic equations.

x² + 3x - 5 = 0 ✓

x² - x = 3x + 7 ✓

5x - 7 = 0 X

7x² + 14x = 0 ✓

x³ - 3x² + 1 = 0 X

x - 5 = 9x + 7 X

What is quadratic equations?

Quadratic equations is a equation that has a general form like "ax² + bx = c"

For example :

x² + 3x - 5 = 0

x² + 3x = 5

x² → ax²

3x → bx

5 → c

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Colt1911 [192]

Answer:

1.5 seconds

Step-by-step explanation:

i took a test with the same question

6 0
3 years ago
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A newspaper article indicated that 43 percent of cars with black seats are white, 46 percent of cars with black seats are blue,
Andrews [41]

Answer:

C) P (X2 ≤ 8.2) = 0.96

Step-by-step explanation:

P value for the test is the probability of obtaining results that have been observed in the null hypothesis statement. A very small value of p indicates that there is unlikely chance of null hypothesis being true which means that we cannot accept null hypothesis based on the small p value.

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3 years ago
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Olympia ate lunch at a restaurant the amount of her check was $6.89 she left eight dollars on the table which included the amoun
maxonik [38]

The equation will be like this,

6.89 + t = 8.00

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To sum up the total amount of cash and coins you have, first, sort each invoice and coin by denomination. Create a separate stack for each denomination and count how many denominations or coins you have.

For each denomination of banknotes and coins, multiply the number you have by the denomination. For example, if you have 4 out of $ 10, multiply by 4x10 to get $ 40. If you have three $ 5 bills, multiply by 3x5 to get $ 15.

Sum the totals to calculate the total amount.

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3 0
2 years ago
40% of the students in a school are boys. lf there are 240 boys, how many student are therein the school?
Stells [14]
40/100 = 96/240

Hope this helps
3 0
3 years ago
What is the value of x? x−2/5=7 Enter your answer in the box in simplest form. x =
fenix001 [56]

Answer:

Your answer is 17.5

Step-by-step explanation:

Turn your fraction into a decimal

2/5 = 0.4

Next multiply my given answer by 0.4

17.5 x 0.4 = 7

Therefore 17.5 is your final answer

3 0
3 years ago
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