Mathematics High School

solve using substitution
y = 3x - 4
3x + y = -4

Answers

Answer 1

y= 3x –4

3x + y = –4

3x + (3x –4) = –4

3x+3x – 4 = – 4

6x = – 4 +4

6x=0 —> x= 0/6 —> x=0

x = 0

y = 3x – 4 —> y = 3(0) – 4 = – 4

y = – 4

So; (x , y) —> (0 , – 4 )

I hope I helped you^_^

Answer 2

Answer:

(0,-4)

Step-by-step explanation:

3x + y = -4

3x + (3x - 4) = -4

3x + 3x - 4 = -4

6x = 0

x = 0

y = 3(0) - 4

y = -4

Related Questions

and solve the two equations for x and y.)
midpoint (-4,-7), endpoint (5,- 10)
The other endpoint is
(Cype an ordered pair.

Answers

Answer:

the formula is x2+x1/2 , y2+y1/2 so plug it in and you will get (1,-17/12)

Step-by-step explanation:

Evaluate the expression x^2 - y^2, if x = -3, and y= 2

Answers

[tex]\\ \rm\longmapsto x^2-y^2[/tex]

[tex]\\ \rm\longmapsto (-3)^2-(2)^2[/tex]

[tex]\\ \rm\longmapsto 9-4[/tex]

[tex]\\ \rm\longmapsto 5[/tex]

how does the surface area of a cone change if the radius doubles?
how would you solve this algebraically?

Answers

Answer:

it changes because the radius has expanded

Which fraction on number lin is equal to 3

Answers

Answer:

12/4

Step-by-step explanation:

12/4

= 3/1

= 3

So, 12/4 = 3

3 attempts remaining.
150 moths lived in a lab. Each week, some moths died, and about 1/5 survived . How many moths were still alive after 2 weeks?

Answers

6 moths were alive
To find the # of moths that survived the first week, you do 150 / 5 and you get 30. Do the same thing again with 30 and you get 6

WILL GIVE BRAINLIEST TO WHOEVER CAN SHOW THEIR WORK:

.8900mm to km

Answers

Answer:

0.0089

Step-by-step explanation:

i dont know how to show my work i did it online, pls give me brainliest :(

Fun Fact: Octopuses lay 56,000 eggs at a time

What is 10% of a number whose square
is 81

Answers

Answer: 0.9

Step-by-step explanation:

Let x be the number

Determine the value of the number

x² = 81

√x² = √81

x = 9

Find the 10% of the number

Final number = rate of percentage × original number

Final number = 10% × 9

Final number = [tex]\boxed{0.9}[/tex]

Hope this helps!! :)

Please let me know if you have any questions


A group of 20 people are going to run a race. The top 6 finishers advance to the finals. In how many different ways can they advance?

Answers

167960 is your awnser

4^x when x = 2 need asap

Answers

Answer:

16

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

16? 4x4=16 i hope this helps

Elsa needs to drive a total of 205.6 miles. So far she has driven 67 miles. How many miles muse she drive?

Answers

Answer:

138.6 miles

Step-by-step explanation:

205.6 - 67 = 138.6

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

y-3 = 2(x+1)
fiind the missing value ?

Answers

Step by step process:

Let's solve for x.

y−3=2(x+1)

Step 1: Flip the equation.

2x+2=y−3

Step 2: Add -2 to both sides.

2x+2+−2=y−3+−2

2x=y−5

Step 3: Divide both sides by 2.

2x/2=y−5/2

x=1/2y+(−5/2)

Answer: x=1/2y+(−5/2)

Let's solve for y.

y−3=2(x+1)

Step 1: Add 3 to both sides.

y−3+3=2x+2+3

y=2x+5

Answer:

y=2x+5

HELPPPPPP MEEEE PLESDEEEE

Answers

Answer:

7, 5, 1, 3

Step-by-step explanation:

Hope this Helps!

Please mark me Brainliest

What is the length of the line?
Please explain in depth and I will give Brainliest​

Answers

Answer:

Step-by-step explanation:

picture will show you all the explaination

Please help me I’ll give a brainliest! Even if you are only able to do one of them it help because I don’t understand how to do it!!!

Answers

Answer:

The x which is not in the domain of the function is the root of the denominator

6) x+3=0, x=-3 is the x which is not in the domain of the function

7) |2x+5|=0, x=-5/2 is the x which is not in the domain of the function

8) x^2-16=0, x=±4 are the x which are not in the domain of the function

Estimate the sales tax and final cost of a book that costs $12.95 with a sales tax
of 6%.

Answers

Step-by-step explanation:

1.06 × 12.95

13.727

which is 13.73 to find the sales tax subtract it from the original

12.95 - 13.73

which is about 28 cents or 0.28

Plessse help, thanks
The profitability, P, of a popular restaurant franchise can be modeled by the function P (t) = t4 – 9t3 + 24t2 – 20t, where t is the number of months since the restaurant opened. How many months after the franchise opens will it begin to show a profit?

5 months
3 months
2 months
1 month

Answers

Replace t with the months given as choices to see which one gives a positive value as an answer.

P(1) = 1^4-9(1)^3 + 24(1)^2-20(1) = -4

P(2) = 2^4-9(2)^3+24(2)^2-20(2) = 0

P(3) = 3^4 -9(3)^3+24(3)^2-20(3) = -6

P(5) = 5^4-9(5)^3+24(5)^2-20(5) = 0

P(6) = 6^4-9(6)^3+24(6)^2-20(6) = 96

It shows a profit in month 6 so it would start showing a profit in month 5.

The answer is 5 months

Write the slope-intercept form of the equation of the line through the given point with the given slope.
through: (1, 1), slope = 6)
through: (-4, -4), slope = 1/4)
through: (4, 5), slope = 7/4)
through: (-4, -5), slope = 0)
through: (5, 1), slope = -2/5

Answers

Answer:

through: (-4, -5), slope = 0)

Step-by-step explanation:

gd afternoon

have a lovely day

NEED ASAP DUE IN 1 HOUR

Answers

10. As 8x = 2x + 60. So x =10
Answer: 10

Explanation:
As 8x=2x+60
x=10

Solve for y.

–5(y − 3) − 10 = –6y

y =

Answers

Answer:

[tex]y = - 5[/tex]

Step-by-step explanation:

[tex] - 5(y - 3) - 10 = - 6y[/tex]

➡️ [tex] - 5y + 15 - 10 = - 6y[/tex]

➡️ [tex] - 5y + 5 = - 6y[/tex]

➡️ [tex] - 5y + 6y = - 5[/tex]

➡️ [tex]y = - 5[/tex]

The price of Pepsi stock was $0.65 in 1981 and $27.56 in 2011. What was the average rate of change for the stock per year
from 1981 to 2011 rounded to the nearest hundredth?

Answers

0.65 at year 0 (0, 0.65)
27.56 at year 30 (30, 27.56)

slope = (27.56 - 0.65) / (30 - 0)
slope = 26.91 / 30

Change = 0.897 or almost 90 cents

hey please help i’ll give brain

Answers

Answer:

[tex]7 \times 6 = 5 \: sixes + 2 \: sixes \\ 7 \times 6 = 30 + 12 \\ = 42 \\ \\ thank \: you[/tex]

Hi ;-)

[tex]7\cdot6=5 \ \text{sixes}+\boxed2 \ \text{sixes}\\\\=\boxed{30}+12\\\\=\boxed{42}[/tex]

This is midpoint please help.

Answers

Step-by-step explanation:

[tex]thank \: you[/tex]

Answer:

(1, 13)

Step-by-step explanation:

it is above in the photo.

5. Esther has 90 mangoes. If she sells a third of the mangoes how many mangoes does she sell?​

Answers

Answer:

30 Mangoes

Step-by-step explanation:

30 is 1/3 of 90.

Answer: Esther has sold 30 mangoes

Step-by-step explanation:

An easy way to solve is dividing 90 by 3

write each expression as a single power of 10
​

Answers

Answer:

[tex]{ \underline{ \sf{it \: is \: {10}^{9} }}}[/tex]

Step-by-step explanation:

[tex](10 {}^{4} ). \frac{ {10}^{12} }{ {10}^{7} } = ( {10}^{4} ). {10}^{(12 - 7)} \\ \\ = ( {10}^{4} ). {10}^{5} \\ = {10}^{(4 + 5)} \\ = {10}^{9} [/tex]

Answer:

[tex]10^{9}[/tex]

Step-by-step explanation:

I. [tex]10^{4} * 10^{12-7}[/tex]

= [tex]10^{4} * 10^{5}[/tex]

= [tex]10^{4 + 5}[/tex]

= [tex]10^{9}[/tex]

Whats the answer and the steps
2(3x-4)

Answers

Answer:

-24

Step-by-step explanation:

2(3x-4)

6x-8

Use the distributive property to write an equivalent expression.
8(3v+3w-2)

Answers

24v+24w-16
I multiplied all the numbers inside the parenthesis to 8, so (8 x 3w),(8 x 3v),(8 x -2). Basically Distrbutive property is you distribute the 8 into the numbers inside the parenthesis and by distribute you just multiply. Lemme know if this is the answer you were looking for!

Answer:

8(3v+3w-2)=(8×3v+8×3w-8×2)

Step-by-step explanation:

8×3v=24v.

8×3w=24w. [24v+24w-16]=(8×3v+8×3w-2×8)

8×(-2)=-16.

Tell me both the numbers for the 2 boxes pls

Answers

I don’t know the answer
The answer is 3 on top 4 on bottom

Lauren bought snacks for her team's practice. She bought a bag of popcorn for $2.37 and a 6-pack of juice bottles. The total cost before tax was $15.45. How much was each bottle of juice?

Answers

Answer:

$2.18

$15.45-$2.37=$13.08

$13.08/6

$2.18

Which variable is dependent temperature or time of day? Which variable is independent?​

Answers

Answer:

 The temperature depends on the time.

The independent variable is the variable the experimenter manipulates or changes.

Hope it helps you.

Solve for x: 4 - (x + 2) < -3 ( x + 4)
(9th grade algebra 1)

Answers

Answer:

[tex]x < -7[/tex]

Step-by-step explanation:

[tex]4 - (x+2) <-3(x+4)\\\\4 - x -2 < -3x -12\\2 -x < -3x-12\\-x < -3x-14\\2x < -14\\x < -7[/tex]

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