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3 years ago

Pls help!! I need help with all the question!!!

Mathematics

1 answer:

Julli [10]3 years ago

4 0

Step-by-step explanation:

can u take a pic of them closer

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Write two different subtraction equations that have 7 as the solution

bulgar [2K]

Answer:

10-3+7 9-2+7

Step-by-step explanation:

logic this is brain needs

5 0

3 years ago

Choose the correct x-intercepts for the following quadratic function.

natali 33 [55]

Brainly doesn't automatically "know" every part of the problems you post here; you have to ensure that your post includes everything in the original problem.

We can still have some fun with answer choice <span>x = 1, x = 3:

An associated quadratic function would have the form y = a(x-1)(x-3). Just supposing that the point (2, 5) were on the graph, then this </span>y = a(x-1)(x-3) would become 5 = a(2-1)(2-3), or 5 = a(1)(-1), or 5 = -a, or a = -5.

Thus, the equation of the parabola would be y = -5(x-1)(x-3), or, in the more usual form, y = -5(x^2 - 4x + 3).

Complete the square to find the vertex:

Steal y = x^2 - 4x + 3 for a moment and complete the square:

x^2 - 4x + 3 = x^2 - 4x + 4 - 4 + 3, or (x-2)^2 - 1

Subbing this back into y = -5(x^2 - 4x + 3), we get

y = -5 [ (x-2)^2 -1 ], or y = -5(x-2)^2 + 5. This shows that the vertex is at (2, 5), that the graph opens downward, and the graph is symm. about the line x = 2.

Having fun yet?

8 0

3 years ago

16. A "stone" is an old unit of weight used

Musya8 [376]

Answer:

560 pounds

Step-by-step explanation:

1 stone=14 pounds

1:14=80:x

x= 80×14=1120 Pounds

1/2x= 560pounds

4 0

3 years ago

PLS HELP I WILL GIVE BRAINIEST If triangle BCD were rotated over the y-axis from point (0, 0), what would be the coordinates of

Sphinxa [80]

The answer would be B

7 0

2 years ago

The heights of baby giraffe are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 b

ANEK [815]

Answer:

$P(\bar X$

And we can solve this using the following z score formula:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we use this formula we got:

$z = \frac{63-63.6}{\frac{2.5}{\sqrt{100}}}= -2.4$

So we can find this probability equivalently like this:

$P( Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

$X \sim N(63.6,2.5)$