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nignag [31]
3 years ago
5

The baking trays Riona uses are 640 mm x 420 mm. Each pizza has a diameter of 20 cm. How many pizzas can Riona fit on one baking

tray?
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
6 0

we know that

Each pizza has a diameter of 20 cm-------> is equal to 200 mm

<u>Divide 640 mm by 200 mm</u>

640/200=3.2---------> 3 pizzas

<u>Divide420 mm by 200 mm</u>

420/200=2.1-------> 2 pizzas

therefore

The number of pizzas that can Riona fit on one baking tray is

3*2=6 pizzas

<u>the answer is</u>

6 pizzas

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snow_tiger [21]

Answer: 76

Step-by-step explanation:

47+3= 50

19+7=26

50+26=76

Where's the Bar Diagram?

Hope this Helps!

4 0
3 years ago
An equation in the form ax2+bx+c=0 is solved by the quadratic formula. The solution to the equation is shown below.x=−7±√ "572"
7nadin3 [17]

Answer:

B: a = 1, b= 7, c = -2

Explanation:

\sf Quadratic \ Equation : \dfrac{-b\pm \sqrt{b^2 - 4ac} }{2a}

Knowing This:

<u>solve for b</u>

  • -b = -7
  • b = 7

<u>solve for a</u>:

  • 2a = 2
  • a = 1

<u>solve c</u>:

  • b² - 4ac = 57
  • 7² - 4(1)(c) = 57
  • -4c = 57 - 49
  • -4c = 8
  • c = 8/-4 = -2
4 0
2 years ago
Read 2 more answers
A simple random sample of size nequals10 is obtained from a population with muequals68 and sigmaequals15. ​(a) What must be true
valentina_108 [34]

Answer:

(a) The distribution of the sample mean (\bar x) is <em>N</em> (68, 4.74²).

(b) The value of P(\bar X is 0.7642.

(c) The value of P(\bar X\geq 69.1) is 0.3670.

Step-by-step explanation:

A random sample of size <em>n</em> = 10 is selected from a population.

Let the population be made up of the random variable <em>X</em>.

The mean and standard deviation of <em>X</em> are:

\mu=68\\\sigma=15

(a)

According to the Central Limit Theorem if we have a population with mean <em>μ</em> and standard deviation <em>σ</em> and we take appropriately huge random samples (<em>n</em> ≥ 30) from the population with replacement, then the distribution of the sample mean will be approximately normally distributed.

Since the sample selected is not large, i.e. <em>n</em> = 10 < 30, for the distribution of the sample mean will be approximately normally distributed, the population from which the sample is selected must be normally distributed.

Then, the mean of the distribution of the sample mean is given by,

\mu_{\bar x}=\mu=68

And the standard deviation of the distribution of the sample mean is given by,

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{15}{\sqrt{10}}=4.74

Thus, the distribution of the sample mean (\bar x) is <em>N</em> (68, 4.74²).

(b)

Compute the value of P(\bar X as follows:

P(\bar X

                    =P(Z

*Use a <em>z</em>-table for the probability.

Thus, the value of P(\bar X is 0.7642.

(c)

Compute the value of P(\bar X\geq 69.1) as follows:

Apply continuity correction as follows:

P(\bar X\geq 69.1)=P(\bar X> 69.1+0.5)

                    =P(\bar X>69.6)

                    =P(\frac{\bar X-\mu_{\bar x}}{\sigma_{\bar x}}>\frac{69.6-68}{4.74})

                    =P(Z>0.34)\\=1-P(Z

Thus, the value of P(\bar X\geq 69.1) is 0.3670.

7 0
3 years ago
Kai and aaron ate 5/6 of pizza . explain how you can tell what fraction of the pizza is left
NeX [460]
Hi there!

Since 1 - 5/6 = 1/6, 1/6 of the pizza is left. 

Hope this helps!
5 0
3 years ago
An object is attached to a spring that is stretched and released. The equation d=-8cos(pi/6 t) models the distance, d, of the ob
sesenic [268]

Answer:

4.62

Step-by-step explanation:

using the distance formula plug in the 6

6=-8cos(pi/6 t)

5 0
3 years ago
Read 2 more answers
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