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3 years ago

I need help with this

Mathematics

2 answers:

Maksim231197 [3]3 years ago

8 0

Answer: 4.75

Step-by-step explanation:

klasskru [66]3 years ago

6 0

12/16 divided by 2 = 3/8

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PLS HELP ASAP PLS PLS PLS

Nana76 [90]

Answer:

i think is D

i hope it’s help you but if not DO NOT FORGET STAY SAFE AT HOME

6 0

3 years ago

Carlos tiene una produccion semanal de 500kg de papas negras y 600kg de batatas al cabo de 12 semanas de ¿cuanto sera la producc

REY [17]

Step-by-step explanation:

1.Producción semanal de papas negras:500kg x 12 semanas=6.000kg por 12 semanas de papa negra

2.Producción semanal de batatas: 600 kg x 12 semanas=7.200kg por 12 semanas de batata

3.Producción total: Para obtenerla producción total sumamos el total producido por las 12 semanas entre papa negra y batata.Entonces tenemos:

6.000kg de papa negra + 7.200 kg de batata=13.200 kg de producido total entre papa negra y batata por 12 semanas

4 0

3 years ago

Find the determinancof the matrix Q.

stepan [7]

Using a Laplace expansion along the first column, we have

$\det Q=2\det\begin{bmatrix}2&1\\-1&6\end{bmatrix}+3\det\begin{bmatrix}3&4\\-1&6\end{bmatrix}+5\det\begin{bmatrix}3&4\\2&1\end{bmatrix}$

The determinant of a 2x2 matrix is trivial,

$\det\begin{bmatrix}a&b\\c&d\end{bmatrix}=ad-bc$

So we have

$\det Q=2\cdot13+3\cdot22+5\cdot(-5)=67$

5 0

4 years ago

Find the value of the variable y, where the sum of the fraction 2/y-3 and 6/y+3 is equal to the quotient.

NISA [10]

Answer:

Here we need to solve:

$\frac{2}{y - 3} + \frac{6}{y + 3 } = \frac{\frac{2}{y-3}}{\frac{6}{y + 3} }$

The sum of the fractions is equal to the quotient between the fractions.

Notice that the two values:

y = 3

y = -3

make the denominator equal to zero, so those values are restricted.

We can simplify the right side to get:

$\frac{2}{y - 3} + \frac{6}{y + 3 } = \frac{\frac{2}{y-3}}{\frac{6}{y + 3} } = \frac{2*(y + 3)}{6*(y - 3)} = 3*\frac{y + 3}{y - 3}$

Now we can multiply both sides by (y - 3)

$(y - 3)*(\frac{2}{y - 3} + \frac{6}{y + 3 }) = 3*(y + 3)\\2 + 6*\frac{y -3}{y + 3} = 3*(y + 3)$

Now we can multiply both sides by (y + 3)

$(2 + 6*\frac{y -3}{y + 3})*(y + 3) = 3*(y + 3)*(y + 3)$

$2*(y + 3) + 6*(y - 3) = 3*(y + 3)*(y + 3)\\\\2*y + 6 + 6*y - 18 = 3*(y^2 + 2*y*3 + 9)\\\\8*y - 12 = 3*y^2 + 6*y + 33\\\\0 = 3*y^2 + 6*y + 33 - 8*y + 12\\\\0 = 3*y^2 - 2*y + 45$

First, let's see the determinant of that quadratic equation:

$D = (-2)^2 - 4*3*45 = -536$

We can see that it is negative, thus, there are no real solutions of the equation.

Thus, there is no value of y such that the origina equation is true,

6 0

3 years ago

Ron and Howard work at Amazon. Ron works x hours per day each week (7days). Howard works one more hour each day, than Ron. Which

KIM [24]

Answer:

Howard works 7x+7 hours in a week

Step-by-step explanation:

Equations

Ron and Howard work at Amazon.

Ron works x hours each week for 7 days. This means he works 7x hours a week.

Howard works one more hour per day than Ron, thus he works x+1 hours per day. This means he works 7(x+1)=7x+7 hours a week.

Howard works 7x+7 hours in a week

8 0

3 years ago

I need help with this ​

I need help with this