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3 years ago

Plz help I’m getting timed

Mathematics

1 answer:

stira [4]3 years ago

3 0

Answer:

$38,465

Step-by-step explanation:

35 x 1,099 = 38,465

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Suppose that there are 25 students in a class, each either a freshman, a sophomore, or a junior. How many students must be in th

Yakvenalex [24]

Answer:

at least 9 students in each cohort.

Step-by-step explanation:

Given that :

In a class, there are 25 students and each of them is either a sophomore, a freshman or a junior. We have to determine the number students in the same cohort.

Let us suppose there are equal number of students in each of the cohort.

Now let us assume that the number of the students in each cohort be 8, i.e. each as a freshman, a junior or a sophomore. Therefore, the total number in the all the cohorts will be 24 students only.

Thus, we can say that there are at least $9$ freshman, at least $9$ sophomore or at least $9$ junior in each of the cohort.

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3 years ago

There are 60 teachers in the school. 40 of them are from Ireland. What fraction of teachers are from Ireland?

Nuetrik [128]

40/60 = 2/3 of the teachers are from Ireland.

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3 years ago

The following set of points belong to a specific function: {(-3,15)(-2,17), (-1,11), (0,3),(1,-1), (2,5),(3,27)} Based on the se

adelina 88 [10]

Answer:

(a)Degree 3

(b) $f(x)=x^3+2x^2-7x+3 .$

Step-by-step explanation:

The function represented by the set of points: {(-3,15)(-2,17), (-1,11), (0,3),(1,-1), (2,5),(3,27)} has 2 turning points when plotted on a graph.

(a)Now, we know that the maximum number of turning points of a polynomial function is always one less than the degree of the function.

Therefore, the polynomial has a degree of 3

(b)A cubic function is one in the form $f(x)=ax^3+bx^2+cx+d .$ where d is the y-intercept.

From the set of values, the y-intercept, d=3

Therefore, our polynomial is of the form:

$f(x)=ax^3+bx^2+cx+3 .$

$\text{At } (-3,15), 15=a(-3)^3+b(-3)^2+c(-3)+3 \implies -27a+9b-3c=12\\\text{At } (-2,17), 17=a(-2)^3+b(-2)^2+c(-2)+3 \implies -8a+4b-2c=14\\\text{At } (-1,11), 11=a(-1)^3+b(-1)^2+c(-1)+3 \implies -a+b-c=8$

Solving the three resulting equations simultaneously use a calculator), we obtain:

$a=1, b=2, c=-7$

Therefore, an equation of this function is:

$f(x)=x^3+2x^2-7x+3 .$

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3 years ago

In △ABC AL is an angle bisector (L∈ BC ). Point M∈ AB so that LM=AM=BM. Find the angles in △ABC, if AC=2AL.

Alex787 [66]

Since LM = AM, point M must be on the perpendicular bisector of AL. Since AM = BM, BL must be perpendicular to AL. This makes ∆ALC a right triangle with hypotenuse AC twice the length of side AL. Hence ∠LAC = ∠LAB = 60°, and AL is angle bisector, median, and altitude.

ΔABC is isosceles with ∠A = 120°, and ∠B = ∠C = 30°.

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4 years ago

There are 45 people on the bus. 60% of them were adults. How many adults were on the bus? Write an explanation

Alla [95]

Answer: i

Step-by-step explanation:

45 into a percent

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3 years ago

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