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3 years ago

Plz, HELP me with this question! Plz, HELP me with this question!

Mathematics

1 answer:

defon3 years ago

4 0

C is the correct answer

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One movie is 120 minutes long. Another is 100 minutes long.

steposvetlana [31]

Answer:

5:20pm

Step-by-step explanation:

120+100=320minutes

320/60=5hrs 20min

12+5:20= 17:20pm or 5:20pm

6 0

3 years ago

The graph shows the total number of hours Katrina worked over a 10-day period. During which one-day interval did she work the mo

o-na [289]

Answer:

4 to 5

Step-by-step explanation:

6 0

3 years ago

If x = -2 and y = 5, then x3y =

sergiy2304 [10]

Answer:

-30

Step-by-step explanation:

x*3y=(-2)*3(5)=-2*15=-30. Hope this helps!

3 0

4 years ago

Read 2 more answers

If jamie completed 5 chores, about how much money did she earn?

QveST [7]

Answer:

5(chore payment)

Step-by-step explanation:

since we dont know how much money the chore is worth it would be 5 times the money

4 0

2 years ago

Using Cramer’s Rule, what is the value of y in the system of linear equations below?

Vadim26 [7]

for the system of equations

$a_1x+b_1y=c_1 \\a_2x+b_2y=c_2$

the three matrices needed to use Cramer's Rule are:

$D=\left[\begin{array}{cc}a_1&b_1\\a_2&b_2\end{array}\right] \\\\D_x=\left[\begin{array}{cc}c_1&b_1\\c_2&b_2\end{array}\right] \\\\D_y=\left[\begin{array}{cc}a_1&c_1\\a_2&c_2\end{array}\right]$ .

To use Cramer's Rule we have to calculate the three determinants listed below of the matrices listed below.

$D=\left[\begin{array}{cc}2&5\\-3&-2\end{array}\right] \\\\D_x=\left[\begin{array}{cc}-13&5\\3&-2\end{array}\right] \\\\D_y=\left[\begin{array}{cc}2&-13\\-3&3\end{array}\right]$ .

The value of the determinants are shown below.

$det(D)=(2)(-2)-(-3)(5)=-4+15=11\\det(D_x)=(-13)(-2)-(3)(5)=26-15=11\\det(D_y)=(2)(3)-(-3)(-13)=6-39=-33\\$

The value of y is $\frac{det(D_y)}{det(D)}=-\frac{33}{11} =-3.$ .

3 0

4 years ago