2x+y =8 and y=x-7 solve by substitution

Answers

Answer 1

Answer:

you can do this by this please vote also

Related Questions

Lexi jarred 2.3 liters of jam after 2 days. How many days does Lexi need to spend making jam if she wants to jar 4.6 liters of jam in all?

Answers

Answer:

bruh 4 days duh

Step-by-step explanation:

3 + 2p - 4 = 11

algebra 1 solving equations

Answers

Answer: the variable is p=6 .

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

Answer:

p = 6

Step-by-step explanation:

Step 1: Simplify both sides.

3 + 2p − 4 = 11

3 + 2p + −4 = 11

(2p) + (3+−4) = 11 (Combine Like Terms)

2p + −1 = 11

2p − 1 = 11

Step 2: Add 1 to both sides.

2p − 1 + 1 = 11 + 1

2p = 12

Step 3: Divide both sides by 2.

2p/2 = 12/2

p=6

WILL MARKDOWN BRAINLIEST

Answers

Answer:

1. $539

2. $300

3. C

Step-by-step explanation:

May I have brainliest?

Evaluate the function f(x) = -2x + 9 when x = 2

Answers

Answer:

I think x= 5

Step-by-step explanation:

because u put 2 where x is supposed to go so it would be -2(2)+9 and -2(2)=-4 and then add 9 and that =5

Please help

Match the picture to the reason that would prove the triangles congruent.

Options:
NONE
ASA
SSS
SAS
AAS
HL

Answers

The answer is none I’m pretty sure

What is the discriminant of the quadratic equation, 4x^2-8x-5=0

Answers

Answer:

Step-by-step explanation:

4x^2-8x-5=0

The discriminant is the number under the √. In this case it's 144

Answer:

[tex]\Delta=144[/tex]

Step-by-step explanation:

For a quadratic in standard form, the discriminant is given by:

[tex]\Delta=b^2-4ac[/tex]

We have the equation:

[tex]4x^2-8x-5=0[/tex]

Hence, our a=4; b=-8; and c=-5.

Substituting into our formula, we acquire:

[tex]\Delta=(-8)^2-4(4)(-5)[/tex]

Evaluate:

[tex]\Delta=64+80[/tex]

Add:

[tex]\Delta=144[/tex]

Therefore, our discriminant is 144.

Notes:

Since our discriminant is a positive value, this tells us that our quadratic has two real roots.

M=_ please help me thank you

Answers

Answer:

m= e= mc square

Step-by-step explanation:

The post office sold 39-cent
commemorative stamps in sheets
of 25 stamps. What was the price
for the sheet of stamps?

Answers

Answer: $9.75.

Step-by-step explanation:

Given: Cost per stamp = 39 cents

since 1 dollar = 100 cent , so 1 cent = 0.01 dollar

So, Cost per stamp = $0.39

Total stamps = 25

Cost of 25 stamps = (Cost per stamp) x (Cost per stamp)

=$0.39 x 25

= $9.75

Hence, the price for the sheet of stamps = $9.75.

The quotient below is shown without the decimal point. Use number sense to place the decimal point correctly.

340.1 ÷ 9.5 = 358

Answers

Answer:

35.8

Step-by-step explanation:

[tex]\frac{340.1}{9.5}[/tex] = 358

We know that our answer can never be greater than 358 since the dividend

is 340.1 and the divisor is 9.5;

Also,

Both values are to one decimal places and we can use this to solve the problem;

9 can divide 340 in about 37 place with a remainder of 7,

So, it is appropriate to make the solution 35.8

Isaac has $15,000 in his bank account. Every month he spends $1,000. He does not add money to the account. EN

Answers

Answer:

Then he has 15 months?

Step-by-step explanation:

you might need to explain your question

question 1/ Find the slope of the line that passes through the points (2, 5) and (-7, -4). If you get stuck, try plotting the points on graph paper and drawing the line through them with a ruler.

Answers

Answer:

I believe the slope is 1

Step-by-step explanation:

Answer:

The slope is 1

Step-by-step explanation:

m=y²-y¹/x²-x¹

m=(-4)-5/(-7)-2

m=-9/-9

m= 1

A rocket is 1.5miles above the earth in 20 seconds and is 8 miles above the earth in 2 minutes. What is the rockets rate of change in miles per seconds

Answers

Given:

A rocket is 1.5 miles above the earth in 20 seconds.

It is 8 miles above the earth in 2 minutes.

To find:

The rockets rate of change in miles per seconds.

Solution:

Let y be the height above the earth after x seconds.

A rocket is 1.5 miles above the earth in 20 seconds. So, the point is (20,1.5).

It is 8 miles above the earth in 2 minutes.

1 minute = 60 seconds

2 minutes = 120 seconds

So, the point is (120,8).

The rockets rate of change in miles per seconds is

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m=\dfrac{8-1.5}{120-20}[/tex]

[tex]m=\dfrac{6.5}{100}[/tex]

[tex]m=0.065[/tex]

Therefore, the rockets rate of change is 0.065 miles per seconds .

I need to know ASAP! Thanks ^^

Answers

Answer:

PQ=30

Step-by-step explanation:

Knowing that the segment has 3 parts that are 3:1:1 and sum up to 50, you could find how much 1 would equal by finding the total in relation to the ratio (doing 3+1+1) which gets you 5 parts. Then you can divide the total (50) by 5 to figure out how much one part would equal (10). Now, since you know that 1 part is equal to 10 and that PQ is 3 parts, you can find that PQ is equal to 3x10, or 30.

2. How much interest is earned on a principal of $200 invested at an interest rate of 9% for eight
years?
Answer:

Answers

Answer: 177

Step-by-step explanation:

Water begins to slowly leak from David’s water bottle right after he fills it. After 5 minutes, he notices the bottle has 26 ounces of water remaining. After 30 minutes, he notices the bottle has 16 ounces of water remaining. Let x represent the number of minutes that have passed and let y represent the amount of water remaining in the bottle.

a) Without calculating, will the rate of change (slope) for the water bottle be positive or negative? Explain how you know.

b) What is the rate of change (slope) of this situation (in ounces per minute)?

c) Write an equation to model this situation:

d) How much water was in David’s bottle immediately after he filled it?

e) After how many minutes will David’s bottle be completely empty?

Answers

B hope it helps and hope u pass your thing ur doing or whatever u doing

a, = 5 +0.2(n-1)
f(n)

Answers

Answer:

a=4.8

Step-by-step explanation:

may be wrong tho

What is 708 divided by 67 with a remainder?

Answers

Answer:

its 10 with the remainder of 38

Step-by-step explanation:

The result of the division is remainder = 38 and quotient = 10

What is division?

Division is the opposite of multiplying. When we know a multiplication fact, we can find a division fact: Example: 3 × 5 = 15, so 15 / 5 = 3. Also, 15 / 3 = 5.

Given that, 708 divided by 67

When dividing 708 by 67 will get 10 as quotient and 38 remainder

Hence, the result of the division is remainder = 38 and quotient = 10

Learn more about division, click;

https://brainly.com/question/21416852

#SPJ2

Simplify the following expression (87x + 63y) - (6x + 32y)

Answers

Answer: 81x + 31y

Step-by-step explanation:

A TV that normally cost $800 is on sale for 33% off. There is a 6% sales tax on the purchase. What is the final cost of the TV?

Answers

Answer:

$568.16

Step-by-step explanation:

Answer: The answer to your problem is $568.16

In the figure below, Angles 1 and 2 are congruent.

If m Z1 = 70°, what is the sum of Angles 3 and 4?
O A. 150°
O B. 140°
O C. 110°
оD 180°

Answers

The answer is A. 150

Write the equation of the line that passes through (-3, -20) and (1,4).

Answers

Answer:

y=6x-2

Step-by-step explanation:

The equation of the line is y=mx+b

FINDING SLOPE: To find the slope of a given line use the equation [tex]\frac{y2-y1}{x2-x1}[/tex]

So x1=-3, y1=-20 and x2=1, y2=4

Plug those numbers into the equation: [tex]\frac{4-(-20)}{1-(-3)}[/tex] and we get the slope which is 6.

FINDING Y-INTERCEPT: Then we find the y intercept by plugging in our points (you can choose) I will use (1,4) and solve.

y=6x+b

4=6(1)+b

b=-2

What is the expanded form of 720.058

Answers

Answer:

Standard Form:

720.058

Expanded forms can be written like a sentence or stacked for readability as they are here.

Expanded Notation Form:

720.058 =

700

+ 20

+ 0

+ 0.0

+ 0.05

+ 0.008

Expanded Factors Form:

720.058 =

7 × 100

+ 2 × 10

+ 0 × 1

+ 0 × 0.1

+ 5 × 0.01

+ 8 × 0.001

Expanded Exponential Form:

720.058 =

7 × 102

+ 2 × 101

+ 0 × 100

+ 0 × 10-1

+ 5 × 10-2

+ 8 × 10-3

Word Form:

720.058 =

seven hundred twenty and fifty-eight thousandths

Step-by-step explanation:

Answer:

700 + 20 + 0 + 0.050 + 0.008

Step-by-step explanation:

5 (2k - 8 ) - 15 = -25
how do I solve this?

Answers

Answer:

3=k

5(2k-8)-15=-2510k-40-15=-2510k-55=-2510k=-25+5510k=3030÷103=k

Which graph has figures that can undergo a similarity transformation to justify that they are similar? On a coordinate plane, a small square and a rectangle are shown. On a coordinate plane, 2 rectangles are shown. The smaller rectangle is 1 unit smaller than the larger rectangle on all sides. On a coordinate plane, 2 rectangles are shown. The smaller rectangle is 1 unit smaller on the left and top sides than the larger rectangle. On a coordinate plane, 2 rectangles are shown. The smaller rectangle is 3 units smaller on the left side and 1 unit smaller on the top than the larger rectangle.

Answers

Answer:

I think it is the second graph.

Step-by-step explanation:

Answer:

its the second graph.

Step-by-step explanation:

Parallel or perpendicular 3x+5y=10 and 5x-3y=-6

Answers

3x+5y=10 and 5x-3y=-6 is perpendicular.

find the value of x PLEASE EXPLAIN

Answers

Answer:

x = 57, x = 111

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180, that is

x + 67 + 56 = 180

x + 123 = 180 ( subtract 123 from both sides )

x = 57

---------------------------------------------------------------------

Similarly

x + 47 + 22 = 180

x + 69 = 180 ( subtract 69 from both sides )

x = 111

We can say that:

In the first triangle, x = 57°In the second triangle, x = 111°

Let's go!

We must know that the sum of all the internal angles of a triangle is equal to 180°. So, just solve an equation to determine x in each triangle.

First triangle:67 + 56 + x = 180 → Sum:123 + x = 180 → We move 123 to the other side, changing its signal.x = 180 - 123 → Subtract:x = 57°Second triangle:22 + 47 + x = 180 → Sum:69 + x = 180 → We move 69 to the other side, changing its signal.x = 180 - 69 → Subtract:x = 111°

________________

Hope this helps! Good studies! ☺

Gregg is on a diet . He started at 250 pounds . After 10 weeks he weighed 245 pounds and after 15 weeks he was 215 pounds . (Rates in pound per week) ?

Answers

i think it’s 2 lbs per week. 10 weeks divided by 5 lbs = 2 lbs/week.

A professional quarterback passed for 4,384 yards in 16 games in one football season. If he passed for the same number of yards each game, how many yards did he pass for in each game? Enter your answer in the box.

Answers

274 yards per game
hope this helps

Which expressions simplify to a rational answer?
Select each correct answer.

Answers

Answer: the answers are the second one and the last one

Step-by-step explanation:

how do you factor quadratics into binomials

Answers

Answer:

Step-by-step explanation:

Step 1: Write the equation in the correct form. In this case, we need to set the equation equal to zero with the terms written in descending order.

Step 2: Use a factoring strategies to factor the problem.

Step 3: Use the Zero Product Property and set each factor containing a variable equal to zero.

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