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lisabon 2012 [21]
2 years ago
11

Mason collects seashells each year on the family trip to Sanibel Island. He has 90 whelks, which is 37.5% of his

Mathematics
1 answer:
anastassius [24]2 years ago
6 0

Answer:420

Step-by-step explanation x=90/0.375

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The height of a tree in feet over x years is modeled by the function f(x).
SVEN [57.7K]
The following statements are true:
The tree grows approximately 7 feet between years 5 and 7; 
the tree stops growing at around 30 feet

In graphing the function, we see that the initial value, when x = 0, is 1 ft, not 2.
Additionally, we can see the values as the height increases; when the tree hits 15 feet, it continues to grow at around 1.5 feet every 0.4 years until it hits around 25 feet tall.  Then it begins to slow down.
6 0
3 years ago
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A line intersects the points (-23, -17) and (-13, -7). Find the slope of the line.
dolphi86 [110]
The slope of a line through points A(x_1, y_1) and B(x_2, y_2)  is :

\displaystyle{ \frac{y_2-y_1}{x_2-x_1}

or 

\displaystyle{ \frac{y_1-y_2}{x_1-x_2}, 

it is the same thing, BUT it it always y's over x's and always in the same order of 1 and 2:

don't write: \displaystyle{ \frac{y_1-y_2}{x_2-x_1}

--------------------------------------------------------------------------------------------------


The slope of the line through the points <span>(-23, -17) and (-13, -7) is :

</span>\displaystyle{  \frac{-17-(-7)}{-23-(-13)}= \frac{-17+7}{-23+13}= \frac{-10}{-10}=1
<span>

Answer: 1</span>
3 0
3 years ago
Solve x please explain
Anna [14]

Answer:

x = 4

Step-by-step explanation:

co interior angles add up to 180.

this means that: 48 + 34x - 4 = 180

thus 48 + 34x = 184

therefore, 34x = 136

so, x = 4.

8 0
2 years ago
Read 2 more answers
X+2y=8<br>2x-y=1<br>mathe question​
Ira Lisetskai [31]

Answer:

x = 2 and y = 3

Step-by-step explanation:

We have

x+2y = 8 -----equation (i)

2x-y = 1 -----equation (ii)

Now,

x+2y = 8

or, x = 8-2y ------equation (iii)

Again,

2x-y = 1

or, 2x = 1+y

or, 2x-1 = y

Putting the value of 'x' from equation (iii)

or, 2(8-2y)-1 = y

or, 16-4y-1 = y

or, 16-1 = y+4y

or, 15 = 5y

or, y = 15/5

or, y = 3

Putting the value of 'y' in equation (iii)

x = 8-2y

or, x = 8-(2×3)

or, x = 8-6

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Therefore, x = 2 and y = 3.

4 0
2 years ago
Which technique for gathering data (observational study or experiment) do you think was used in the following studies?(a) The Co
miv72 [106K]

Answer:

For question a, the correct option is: This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

For question b, the correct option is: This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

For question c, the correct option is: This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.

For question d, the correct option is: This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

Step-by-step explanation: To give us a background on why the options above were chosen, let us see the difference between Observational study and Experimental study.

In an observational study, the researcher draws inferences from an independent variable that is not under his/her control. While in an experimental study, there in an intervention and the effects of the intervention are studied.

Therefore, in the questions a to d above, all we need to do is identity which variables were influenced and which were merely observed.

For question a, the variables were only observed.

For question b, the variables were influenced.

For question c, the variables were also influenced.

For question d, the variables were merely observed.

6 0
3 years ago
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