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3 years ago

Check if (3, 3) is a solution of the system 3x + 2y = 2 5x - 2y = 9

Mathematics

1 answer:

Gnesinka [82]3 years ago

5 0

Answer:

no it's not a solution of the system

Step-by-step explanation:

when equating 3 in x and 3 in y on the line 3x+2y it does not sum up to 2 but when equate 3 in x and 3 in y on the line 5x-2y it sum up to 9

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A zoo orders food in bulk for it's animals. they order enough fresh fruit to last 10 days, enough fresh vegetables for 7 days, a

hammer [34]

Answer:

The answer to this question is C.) 70 Days

7 0

2 years ago

Karl drove 619.5 miles. For each gallon of gas, the car can travel 41 miles. What is a reasonable estimate of the number of gall

dusya [7]

Answer:

Step-by-step explanation:

Calculation for What is a reasonable estimate of the number of gallons of gas Karl used

Estimated number of gallons used=619.5 miles/41 miles

Estimated number of gallons used=15

Therefore the reasonable estimate of the number of gallons of gas Karl used is 15

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3 years ago

We measure the diameters for a random sample of 25 oak trees in a neighbourhood. Diameters of oak trees in the neighbourhood fol

jarptica [38.1K]

Answer:

The required confidence inteval = 94.9%.

Step-by-step explanation:

Confidence interval: Mean ± Margin of error

Given: A confidence interval for the true mean diameter of all oak trees in the neighbourhood is calculated to be (36.191, 42.969).

i.e. Mean + Margin of error = 42.969 (i)

Mean - Margin of error = 36.191 (ii)

Adding (i) and (ii), we get

$2Mean =79.16\\\\\Rightarrow\ Mean= 39.58$

Margin of error = 42.969-39.58 [from (i)]

= 3.389

Margin of error = $t^* \dfrac{\sigma}{\sqrt{n}}$

here n= 25 $, \ \sigma=8.25$

i.e.

$3.389=t^*\dfrac{8.25}{5}\\\\\Rightarrow\ t^* = \dfrac{3.389}{1.65}\\\\\Rightarrow\ t^* =2.0539 \$

Using excel function 1-TDIST.2T(2.054,24)

The required confidence inteval = 94.9%.

7 0

3 years ago

Can someone answer this !

rodikova [14]

Answer:

11253

Step-by-step explanation:

the steps are described in the picture above

6 0

3 years ago

Which of the following best describes the movement of an object

Ainat [17]

There is no following, however

Motion, best describes the movement of an object.

Hope this helps!

4 0

3 years ago