The number of DVDs sold at a store in a month was 925 and the number of DVDs sold decreased by 12 per month. The number of Blu-ray discs sold in the same store in the same month was 507 and the number of Blu-ray discs sold increased by 26 per month. Let d represent the number of discs sold and t represent the time in months.
Write a system of equations by filling in the blanks:
d= _ t+ _
d= _ t+ _
Solve the system of equations using the substitution method. Complete the sentence to describe the solution.
There will be _ DVDs and Blu-Ray discs sold per month in _ months

Answer:

B.

Step-by-step explanation:

Answer:

A.

Step-by-step explanation:

cause its congruent just flip and get

ZYX

brainliest appreciated

Answer:

48 sec.

Step-by-step explanation:

8 devided by 10.

Answer:

48 seconds

Step-by-step explanation:

8 min / 10 laps = 0.8 mins

to convert minutes into seconds, multiply by 60

0.8*60 = 48 seconds

Answers

x= -3/2

x= 3i

x= -3i

Step-by-step explanation:

f (x) = 2x3 + 3x2 + 18x + 27

Set 2x^3 + 3x^2 + 18x + 27 equal to 0.

2x^3 + 3x^2 + 18x + 27 = 0

Solve for x.

Factor the left side of the equation.

Factor out the greatest common factor from each group.

x^2 (2x + 3) + 9 (2x + 3) = 0

Factor the polynomial by factoring out the greatest common factor, 2x + 3. (2x + 3) (x^2 + 9) = 0

If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.

2x + 3 = 0

x^2 + 9 = 0

Set 2x + 3 equal to 0 and solve for x.

Set 2x + 3 equal to 0. 2x + 3 = 0

Solve 2x + 3 = 0 for x. Tap for more steps...  

3 x = − 2

Set x2 + 9 equal to 0 and solve for x.

Set x2 + 9 equal to 0. x2 + 9 = 0

Solve x2 + 9 = 0 for x.

x = 3i, −3i

The final solution is all the values that make (2x + 3) (x2 + 9) = 0 true.

x = − 3/2 , 3i, −3i

Answer:

use the app called msthway

Answer:

Everyone got 52/25 = 2.08 slices of pizza.

Step-by-step explanation:

1 large sized pizza = 8 slices

6.5 large sized pizzas = 52 slices

52/25 = 2.08

Hope this helps :D

Answer:

the material when you get a chance can you send me the material

Answer:

All of the answers are correct.

Answer:

all the answers are right bc if u look at them their all the same i also took the test

Step-by-step explanation:

Answer:

can you elaborate a little more

Answer:

450 cm

Step-by-step explanation:

25 on both sides 2x25

4 squares = 25x4

4 sides for 4 squares = 100x4

400+50

Answer: C

Step-by-step explanation:

Answer:

j + 2

Step-by-step explanation:

1/3(3j) + 1/3(6)

1/3(3j) = j

1/3(6) = 2

Answer: j + 2

Answer:

your answer will be 22

Step-by-step explanation:

if you add 20 by 2 it will give you 22 use a calculator if not sure but 22 is your answer

Answer:

A

Step-by-step explanation:

a function may not have the same values of X.

Answer:

c=5

Step-by-step explanation:

in right lower triangle

c²=a²+b²

c=√(4²+3²)=√25=5

sorry I don't understand it.which length of diagonal is needed to find.comment me.

Answer:

The best course grade your friend can earn is 0.867 = 86.7%.

The minimum score would your friend would need on the final to earn a 75% for the course is of 0.61 = 61%.

Step-by-step explanation:

This is a weighed average problem, in which we multiply each grade by its weight.

We have that:

In 70% of the course, the friend has a grade of 81%.

In the other 30%, he will have x.

What is the best course grade your friend can earn?

This will happen if he earns 100% = 1 on the final test. So

[tex]G = 0.7*0.81 + 0.3*1 = 0.867[/tex]

The best course grade your friend can earn is 0.867 = 86.7%.

What is the minimum score would your friend would need on the final to earn a 75% for the course?

This is x, when the grade is 0.75. So

[tex]0.75 = 0.7*0.81 + 0.3x[/tex]

[tex]0.3x = 0.75 - 0.7*0.81[/tex]

[tex]x = \frac{(0.75 - 0.7*0.81)}{0.3}[/tex]

[tex]x = 0.61[/tex]

The minimum score would your friend would need on the final to earn a 75% for the course is of 0.61 = 61%.

Answer:

90

Step-by-step explanation:

Just multiply what the variables equal to

Step-by-step explanation:

[tex] \underline{ \underline{ \text{Given}} }: [/tex]

[tex] \underline{ \underline{ \text{To \: find}}} : [/tex]

[tex] \underline{ \underline{ \text{Solution}}} : [/tex]

Plug the values of x , y & z in the given expression and then multiply !

⇾ [tex] \tt{2 \times ( - 5) \times ( - 9)}[/tex]

⇾ [tex] \tt{( - 10) \times ( - 9)}[/tex]

⇾ [tex] \tt{90}[/tex]

[tex] \red{ \boxed{ \boxed{ \text{Our \: final \: answer : \boxed{ \underline{ \tt{ 90}}}}}}}[/tex]

Hope I helped ! ♡

Have a wonderful day / night ! ツ

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Answer:

the length is 14 yards and the width is 8 yards

Answer:

μy = $6.56 ; σy = 2.77

Step-by-step explanation:

Given the data :

Mean μx= $8.56

Standard Deviation σx ≈ 2.77

Profit, Y on pizza with current promo :

Price off on pizza = $2

Y = x - 2

μx = E(x) = $8.56

μy = μ(x - 2)

μy = μx - $2

μy = $8.56 - $2

μy = $6.56

For the standard deviation of y

σx ≈ 2.77

σy = σ(x - 2)

σy = σx - 2

Constants are treated as 0 for standard deviation

σy = 2.77

Apply l'Hopital's rule:

[tex]\displaystyle\lim_{x\to\pi}\frac{\displaystyle\int_\pi^x (1+\tan(t))\,\mathrm dt}{\pi\sin(x)}=\lim_{x\to\pi}\frac{1+\tan(x)}{\pi\cos(x)}=\frac{1+\tan(\pi)}{\pi\cos(\pi)}=\boxed{-\frac1\pi}[/tex]

where

[tex]\displaystyle\frac{\mathrm d}{\mathrm dx}\left[\int_\pi^x(1+\tan(t))\,\mathrm dt\right]=1+\tan(x)[/tex]

follows from the fundamental theorem of calculus.

Answer:For the first one it would be x=35

And the 2nd one would just be x=-1

Step-by-step explanation:

Answer:

Number 1

Step-by-step explanation: Not sure just assuming I think I am right not gonna lie

Answer:

[tex]m\angle R=35^{\circ}\\m\angle T=45^{\circ}[/tex]

Step-by-step explanation:

Since both triangles in this figure are similar, their corresponding angles must be equal.

Since [tex]\angle R[/tex] corresponds with [tex]\angle U[/tex]:

[tex]m\angle U=m\angle R=\fbox{$35^{\circ}$}[/tex].

Similarly, [tex]\angle T[/tex] corresponds with [tex]\angle Q[/tex]:

[tex]m\angle Q=m\angle T=\fbox{$45^{\circ}$}[/tex].

Answer:

See below

Step-by-step explanation:

Q11

Triangle is 45° and therefore isosceles

Q12

Q13

Q14

Q15

Q16

Answer:

C not sure though

Step-by-step explanation:

Answer:

[tex]\theta = 120, 240[/tex], in degrees

Step-by-step explanation:

The secant of an angle is given by:

[tex]\sec{\theta} = \frac{1}{\cos{\theta}}[/tex]

In this question:

[tex]\sec{\theta} = -2[/tex]

So

[tex]\frac{1}{\cos{\theta}} = -2[/tex]

[tex]-2\cos{\theta} = 1[/tex]

[tex]\cos{\theta} = -\frac{1}{2}[/tex]

In the first quadrant, the angle that has cosine of 1/2 is 60º.

The cosine is negative in the second and in the third quadrant.

The equivalent angle to 60º in the second quadrant is of 180º - 60º = 120º.

The equivalent angle to 60º in the third quadrant is of 180º + 60º = 240º

So the values of [tex]\theta[/tex] in the interval are:

[tex]\theta = 120, 240[/tex], in degrees

Answer: The exact answer is 17.662 so I would assume the answer is 18 because it rounds up

Step-by-step explanation:

The number of the trees that will be left after 10 years will be 2.3 billions.

A rate of change is negative when the output decreases as the input increases or when the output increases as the input decreases.

Given that, the number of trees in a rainforest decreases each month by 0.5%. The forest currently has 2.5 billion trees.

The expression will be:

A = P(1-r)ⁿ

A = final amount

P = initial amount

r = rate

n = time

Therefore,

A = 2500000000(1-00.5)¹⁰

A = 2500000000(0.995)¹⁰

A = 2300000000

Hence, the number of the trees that will be left after 10 years will be 2.3 billions.

Learn more about decreasing rate, click;

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