Mathematics College

Solve each system of equations by substitution
y = 2x + 3
y = -x - 9

What is the product of x and y ?

Solve Each System Of Equations By Substitution Y = 2x + 3y = -x - 9What Is The Product Of X And Y ?

Answers

Answer 1

Answer:

x = -4

-----------

y = -5

Answer 2

Answer:

i beleieve the first answer is -5 and the other -4

Step-by-step explanation:

Related Questions

Which expression is less than 95?

Answers

Answer:

its B

Step-by-step explanation:

cause 11/12 = 0.916666

so if we multiply 95 with 11/12 it becomes smaller than 95

Find (x - 1)(x ^ 2 + 5x - 3) . Write your answer in standard form .

Answers

The answer is

x^3+4x^2-8x+3

look at this triangle
work out the length AB​

Answers

This has to be at least 20 characters long so the answer should most likely be 60
The answer is 23.4 just use the pythagorean theorem

What is the value of −915−10+25+2(1412−7)?

Answers

Answer:

[tex] \sf \pink{1910}[/tex]

help pls thank you
ok byeeee

Answers

Answer:

fine, the answer is 38.47 inches squared;why are you getting this from a live quiz? I know it is a live quiz because it probably is FLVS

Step-by-step explanation:

7 divided by 2 = 3.5

3.5 x 3.5 x 3.14 = 12.25 x 3.14 = 38.465

ROUND IT AND GET 38.47

plz help asap (make sure to put a real explanation)​

Answers

Answer:

w= 1 29/45

isolate the variable by dividing each side by the numbers that don't contain the variable.

I NEED HELP ASAP! PLEASEEE I WILL GIVE YOU EVERYTHING AND GOOD REVIEWS!!

You want to park your boat at a local boat dock at 1pm but we are in a drought and you need to make sure that the water will be high enough. Your boat will get stuck if the tide is not at least 7 feet high. The high
tide is at 5:00 am and a low tide at 10:00 am. At the low tide the water depth is 4 feet and at the high tide
the water depth is at 10 feet.

1. Sketch a graph to represent the height o the water at any given time after midnight. Graph at least 2 periods of the tide cycle

2. Identify all relevant parts of the graph

3. Write 2 general equations of the function (one as a cosine function and one as a function)

4. Use 2 different mathematical methods to find the height of the tide at 12.5 hours after midnight and then verify that answer. (Discuss the role each mathematical Mathis has in answering this question)

5. Will you be able to park your boat at the time? Give a detailed explanation to support your answer

Answers

Answer:

no you will not be able to park the boat

Step-by-step explanation:

ok so now i need those reviews

What does 3/8 + 7/8=

Answers

Answer:

since the denominators are the same we add 3 and 7 in the numerator to get 10/8 or 1 2/8, and we can simplify to 5/4 or 1 1/4.

Hope this helps and brainliest please

Answer:

5/4

For the steps refer the attachment below.

Hope it helps

Please mark me as the brainliest

Thank you

What is 9c+1= 10?????????

Answers

Answer:

c=1

Step-by-step explanation:

Answer:

I believe c is 1

Step-by-step explanation:

2) A store owner offered a 20% discount off the regular price of a mirror. The regular price
of the mirror is $35.
What is the amount of the discount?
F $7
G $28
H $14
J $3.50

Answers

Answer:the answer is 28 the second one.

Step-by-step explanation:

Answer:

7$

Step-by-step explanation:

victor is selling lemonade to raise money for his school the amount of money he collected from his sales each day is summarized on the box plot below

Answers

The answer is 7. I just did it

The interquartile range of Victor's lemonade sale is A = 7

What in Interquartile Range ( IQR )?

The distance between the upper and lower quartiles is known as the interquartile range. Half of the interquartile range corresponds to the semi-interquartile range. Finding the values of the quartiles in a small data set is straightforward.

The spread of the data, or statistical dispersion, is measured by the interquartile range. The middle 50%, fourth spread, or H-spread are further names for the IQR. It is described as the spread between the data's 75th and 25th percentiles.

Given data ,

Let the interquartile range of sales of Victor's lemonade be A

Now , the equation will be

Let the 75th percentile data = 29

Let the 25th percentile data be = 22

Now , the IQR is calculated by spread between the data's 75th and 25th percentiles

On simplifying , we get

The IQR = 29 - 22 = 7

Hence , the interquartile range is 7

To learn more about interquartile range click :

https://brainly.com/question/15686744

#SPJ7

The complete question is :

Victor is selling lemonade to raise money for his school the amount of money he collected from his sales each day is summarized on the box plot below.

What is the interquartile range of the data?

Help plz plz plz plz plz plz

Answers

The answer is the first one “the diagonals are congruent

find the length of the third side if necessary write in simplest radical form​

Answers

Answer:

4

Step-by-step explanation:

This is a special right triangle, specifically the 30-60-90 triangle. See attached image for how sides relate.


Graph the line y = -2/3x + 8 with appropriate labels and scale. Plot the point on the line that represents the solution to the question in part c

Answers

Answer:

Step-by-step explanation:

Equation of the line is,

y = [tex]-\frac{2}{3}x+8[/tex]

Table for input-output values,

x       0         3         6         9         12

y       8         6         4         2          0

Now we can plot these points on the graph to get the linear graph.

(As attached)

The points (-3, 10), (0, 8), and (3, 6) lie on the graph of the equation y = -2x/3 + 8.

Given that an equation y = -2x/3 + 8 we need to plot the graph of the equation and mark the points that satisfy the equation.

To plot the graph of the equation y = -2x/3 + 8, we can start by choosing some values for x and calculating the corresponding values for y.

Let's choose a range of x-values and find their corresponding y-values:

x = -3: y = -2(-3)/3 + 8 = 2 + 8 = 10

x = -2: y = -2(-2)/3 + 8 = 4/3 + 8 = 8.33

x = -1: y = -2(-1)/3 + 8 = 2/3 + 8 = 8.67

x = 0: y = -2(0)/3 + 8 = 8

x = 1: y = -2(1)/3 + 8 = -2/3 + 8 = 7.33

x = 2: y = -2(2)/3 + 8 = -4/3 + 8 = 6.67

x = 3: y = -2(3)/3 + 8 = -2 + 8 = 6

Now we can plot these points on a graph and connect them to visualize the equation:

Hence the points (-3, 10), (0, 8), and (3, 6) lie on the graph of the equation y = -2x/3 + 8.

Learn more about equation of a line click;

https://brainly.com/question/21511618

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A school principal wants to find out if his school needs more bike racks. A survey is taken of 30 students who
ride their bikes to school. Why might the sample be blased?

Answers

Answer: This sample may be biased because he is only asking the bike riders when in reality there might be a majority of students who instead take an alternate form of transportation

Step-by-step explanation:

Selma went shopping and bought identical sweaters for each of 3 friends. If she spent $42, what was the cost of each sweater? Include your equation with your answer.

Answers

Answer: 14$  a sweater

Step-by-step explanation: 42$ divided by three friends equals 14$ a sweater

Examine the expanded form.
a. a. a. a. a. a. a

which is the expression in exponential from?
O 7a
O 7a
O a7 <-------
O a + 7

need help fast pls!​

Answers

a7 or a^7 so the third option should be correct

Answer:

c

Step-by-step explanation:

Malia split up The large container of salsa that she bought equally into five balls to place around her house for the party if each bowl contained 8.5 ounces of salsa which shows the correct equation and value of X the total amount of salsa in the original container

Answers

Answer:

B. [tex] \frac{x}{5} = 8.5 [/tex]; [tex] x = 42.5 ounces [/tex]

Step-by-step explanation:

Total amount of salsa in container = x

Number of bowl the salsa is divided into = 5

Amount contained by each bowl = 8.5 ounces of salsa

Therefore:

[tex] \frac{x}{5} = 8.5 [/tex] ---› equation

Solve for x

Multiply both sides by 5

[tex] \frac{x}{5}*5 = 8.5*5 [/tex]

[tex] x = 42.5 [/tex]

100 POINTS! URGENT PLZ HELP
Select the correct answer. What is the simplified form of 4x√5-2π√5/3√5

Answers

Answer:-

[tex]\pink{\bigstar}[/tex] Simplified form [tex]\large\leadsto\boxed{\tt\purple{\dfrac{2 \pi}{3}}}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• Given:-

[tex]\sf \dfrac{4 \pi \sqrt{5} - 2 \pi \sqrt{5}}{3 \sqrt{5}}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• To Find:-

Simplified form

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• Solution:-

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ [tex]\sf \dfrac{4 \pi \sqrt{5} - 2 \pi \sqrt{5}}{3 \sqrt{5}}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ [tex]\sf \dfrac{2 \pi \sqrt{5}}{3 \sqrt{5}}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ [tex]\sf \dfrac{\sqrt{5} (2 \pi)}{\sqrt{5} (3)}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ [tex]\sf \dfrac{\cancel{\sqrt{5}}(2 \pi)}{\cancel{\sqrt{5}} (3)}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

★ [tex]\bold\red{\dfrac{2 \pi}{3}}[/tex]

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Therefore, Option A is the correct choice.

option A.

Step-by-step explanation:

we have

[tex] \frac{4\pi \sqrt{5} - 2\pi \sqrt{5} }{3 \sqrt{5} } [/tex]

taking out 2[tex] \pi\sqrt{5}[/tex] common from the numerator

[tex] \frac{2\pi \sqrt{5}(2 - 1) }{3 \sqrt{5} } [/tex]

canceling [tex] \sqrt{5} [/tex] from both numerator and denominator

[tex] \frac{2\pi(1)}{3} [/tex]

hence the answer is option A.

Lara made some chocolate tarts. For every 5 cups of chocolate chips, she added 3 cups of sugar. The ratio of chocolate chips to sugar in Lara's chocolate tarts is ____. (5 points)

Answers

Answer:

5:3

Step-by-step explanation:

For the equation below, what should be added to both sides of the equation to make the left hand side a Perfect Square Trinomial?

x
2
+34x=7

Answers

Answer:

6

Step-by-step explanation:

Marge wants to buy a CD player. The CD player costs $300. Marge gets 30% off. How much did Marge pay?

Answers

Answer:

300-(300*0.3) = 210

Step-by-step explanation:

Answer:

$210

Step-by-step explanation:

300*30%=90

300-90=210

A car travels 320 miles in 7.5 hours. If the car continues at the same rate, how far
will it travel in 12 hours?

Answers

Answer:

512.04

Step-by-step explanation:

first you need to find out how many miles it goes in 1 hour so 320 divided by 7.5 which is 42.67

then take 42.67 and multiply it by 12

hope this helps!!

Answer:450

Step-by-step explanation:

Your options :
9,2
10,4
11,5
10,6

Answers

I’m on the same question

Answer:

i would say (10,6)

Step-by-step explanation:

If x = 6 units, y = 6 units, and h = 7 units, find the area of the trapezoid shown above using decomposition.
A.
126 square units
B.
84 square units
C.
42 square units
D.
63 square

Answers

Answer:

B. 84 square units

Step-by-step explanation:

I've drawn a photo if you want an explantion, but if you still don't understand, please let me know! Cheers!

Plz help thanks

Plz help.
Plz help ASAP thanks

Answers

Answer:

C) 1 3/8

I hope this helped :)

explanation:

I used the process of elimination. The other answers didn't make sense.

I need help finding the circumference of this circle ​

Answers

Radius times 2 = diameter which would be 10 times 3.14 is 31.4 so it’s 31.4

Convert binary 11011.110 to base 10

Answers

Answer:

27.75₁₀

Step-by-step explanation:

Convert binary 11011.110 to base 10

11011.110 = 1*2^4 + 1*2^3+0*2^2 + 1*2^1 + 1* 2^0 + 1*2^-1 + 1* 2^-2 + 0

11011.110 = 16+8+0+2+1+1/2+1/4

11011.110 =27 + 3/4

11011.110  = 27.75₁₀

Hence the binary number to base 10 is 27.75₁₀

my mom made pizza rolls who wants sum

Answers

Answer:

weird flex but ok

Step-by-step explanation:

PLS HELP!! :))

Find the volume......

Answers

Answer:

19 + 14 + 10 = 43

Step-by-step explanation:

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