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Questions in mathematics

[Done] Two girls spent the same amount of money as five boys on a shopping trip. If the seven of them spent $2100 altogether, how much money did each boy spend?

[Done] Suppose that the polynomial function [tex]$f$[/tex] is defined as follows: [tex]$f(x)=6(x-13)(x+12)(x-7)^2(x+8)^3$[/tex] List each zero of [tex]$f$[/tex] according to its multiplicity in the categories below. If there is more than one answer for a multiplicity, separate them with commas. If there is no answer, click on "None." Zero(s) of multiplicity one: Zero(s) of multiplicity two: Zero(s) of multiplicity three:

[Done] Express $\frac{7}{10}$ in decimal fraction

[Done] $3-4 x \geqslant x-7$

[Done] The famous iris dataset (the first sheet of the spreadsheet linked above) was first published in 1936 Fisher. The dataset contains 50 samples from each of 3 iris species: setosa, virginia, and versicolor. are measured, all in cm : sepal length, sepal width, petal length, and petal width. What is the equation for the least square regression line where the independent or predictor variable length and the dependent or response variable is sepal width for iris versicolor? [tex]$\hat{y}=\text { Ex } 1.234 x+\square \text { Round to three decimal places. }$[/tex] What is the predicted sepal width for iris versicolor for a flower with a sepal length of 8.00 ? [tex]$\square$ cm Round to three decimal places.[/tex]

[Done] Given $y=(2 x+3)^2$, choose the standard form of the given quadratic equation. A. $0=4 x^2+10 x+6$ B. $0=25 x^2$ C. $0=4 x^2+9$ D. $0=4 x^2+12 x+9$

[Done] Find the least common denominator for these fractions. Enter your answer in the space provided. [tex]\frac{4}{7}[/tex] and [tex]\frac{2}{8}[/tex]

[Done] Which of the following correctly represents 4.244 as a mixed number? A. $4 \frac{61}{250}$ B. $4 \frac{49}{200}$ C. $4 \frac{167}{500}$ D. $4 \frac{68}{125}$

[Done] Determine whether the equation defines y as a function of x. [tex]y=\frac{4}{x+3}[/tex] Does the equation define [tex]y[/tex] as a function of [tex]x[/tex]? Yes No

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?