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julia-pushkina [17]

3 years ago

11

Roberto wrote a sentence that describes an equation half of a number is 45 which choice shows Roberto’s equation and it’s soluti

on

1 answer:

xenn [34]3 years ago

3 0

Answer:The correct answer is D-x/2=45; x=90

Explanation: I just took the test and got a 100%

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Makovka662 [10]

Look at the ss down below

4 0

3 years ago

Read 2 more answers

A time for the 100 meter sprint of 14.9 seconds at a school where the mean time for the 100 meter sprint is 17.6 seconds and the

kirza4 [7]

Answer:

Z-score = -1.285

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 17.6 seconds

Standard Deviation, σ = 2.1 seconds

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

For x = 14.9, we have:

$z_{score} = \displaystyle\frac{14.9-17.6}{2.1} = -1.285$

A z-score to be unusual if its z-score is less than -2.00 or greater than 2.00.

Thus, the z-score is not unusual as it lies in the range [-2.00, 2.00]

6 0

3 years ago

Factorising quadratics<br><br> X squared + 5x -6<br> X squared - 2x15<br> X squared -7x +12

34kurt

Answer:

(x -1)(x +6)
(x -5)(x +3)
(x -4)(x -3)

Step-by-step explanation:

In each case, you're looking for divisors of the constant that have a sum equal to the x-coefficient. Those divisors are the constants in the binomial factors.

1) -6 = -1·6 = -2·3 . . . . . (-1)+(6) = 5, so these are the constants of interest.

x^2 +5x -6 = (x -1)(x +6)

__

2) -15 = -1·15 = -3·5 = -5·3 . . . . . (-5)+(3) = -2, so these are the constants of interest

x^2 -2x -15 = (x -5)(x +3)

__

3) 12 = -1·-12 = -2·-6 = -3·-4 . . . . . (-3) +(-4) = -7, so these are the constants of interest

x^2 -7x +12 = (x -3)(x -4)

5 0

4 years ago

The length of a shadow of a building is 28 m. The distance from the top of the building to the tip of the shadow is 32 m. Find t

True [87]

Check the picture below.

6 0

3 years ago

(5^3)^9 ye yevehehehehdh

saw5 [17]

Answer:

5^27 is the simplified version

Step-by-step explanation:

5

6 0

3 years ago