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2 years ago

2+2/4+7-9x(-5). Please help me

Mathematics

1 answer:

Cerrena [4.2K]2 years ago

3 0

Answer:

109/2 is the answer of your question . Use PEMDAS rule

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A school has 147 third graders. The third grade teachers have planned a special treat for the last day of school and brought ice

Hunter-Best [27]

Add all of the students who like the ice creams and subtract from 147 :)

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2 years ago

X^{2} - 8x + 7 = 0<br> Solve by completing the square. Also can you include steps?

iren [92.7K]

Answer:

{1, 7}

Step-by-step explanation:

Start with x^2 - 8x + 7 = 0.

We want to modify the first two terms to resemble x^2 - ax + b - b, where a is the coefficient (here -8) of the x term and b is the square of half of a.

Here, a = -8. Half of that is -4. The square of -4 is 16, and this is the value of b.

Write out x^2 - 8x as x^2 - 8x + 16 - 16. This is the perfect square of -4, added to x^2 - 8x and then subtracted from the result

Then the original equation, x^2 - 8x + 7 = 0, can be rewritten as:

x^2 - 8x + 16 - 16 + 7 = 0, and then as (x - 4)^2 - 9, or (x - 4)^2 = 9.

We want to solve this result for x. To do this, take the square root of both sides:

x - 4 = ±√9, or x - 4 = ±3.

Adding 4 to both sides, we get:

x = 4 ± 3. Thus, the solutions are x = 4 + 3 = 7 and x = 4 - 3 = 1.

6 0

3 years ago

Read 2 more answers

1q - 2x = 7<br> What is x<br> please im so stuck on this i will give brainliest

Tems11 [23]

Answer: x

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Which function has two x-intercepts, one at (0, 0) and one at (4, 0)?

muminat

Answer:

y = (x - 2)² - 4

Step-by-step explanation:

I graphed the points on the graph below and found a function that had those points as solutions.

If this answer is correct, please make me Brainliest!

8 0

3 years ago

Major league baseball salaries averaged $1.5 million with a standard deviation of $0.8 million in 1994. suppose a sample of 100

seropon [69]

Answer: The probability that the avg. salary of the 100 players exceeded $1 million is approximately 1.

Explanation:

Step 1: Estimate the standard error. Standard error can be calcualted by dividing the standard deviation by the square root of the sample size:

$SE=\frac{0.8}{\sqrt{100}}=\frac{0.8}{10} = 0.08$

So, Standard Error is 0.08 million or $80,000.

Step 2: Next, estimate the mean is how many standard errors below the population mean $1 million.

$\frac{1 - 1.5}{0.08}$

$=-6.250$

-6.250 means that $1 million is siz standard errors away from the mean. Since, the value is too far from the bell-shaped normal distribution curve that nearly 100% of the values are greater than it.

Therefore, we can say that because 100% values are greater than it, probability that the avg. salary of the 100 players exceeded $1 million is approximately 1.

5 0

2 years ago