Solve the system of equations 3x – 3y = 30 and 2x + y = 11 by
combining the equations.

Answers

Answer 1
Times bottom equation by 3 and top by 2 to get the same coefficient of x
6x-6y=60
6x+3y=33
Minus the bottom by the top
-9y=27
y=-3
substitute this in to one of the equations
2x -3 = 11
add 3 to both sides
2x=14
x=7

Related Questions

Please Help for brainliest and points

Answers

Using bisector theorem,

(21/x) = (7/5)
x = (21/7)*5 = 15

SR = SP + PR = 5 + 15 = 20

Find the quotient. 4,610 ÷ 16


show work please <3.

Answers

4,610 divided by 16 is 288.125

Work:

Given f() = 3x – 29
Find f (4)

Answers

Sub in 4 as x
3(4) - 29
= -17

Answer:

-17

Step-by-step explanation:

Plug in 4 for all your Xs

f(4)=3(4)-29

=12-29

=-17

What is the coefficient of the second term of the trinomial? (In other words, what is B?)

(3x − 1)^2 = 9x^2 −Bx + 1

In the blank, write what B equals. Use only numbers - no letters or spaces.

Answers

Answer:

b = 6

Step-by-step explanation:

Let's solve for b.

(3x−1)2=9x2−bx+1

Step 1: Flip the equation.

−bx+9x2+1=9x2−6x+1

Step 2: Add -9x^2 to both sides.

−bx+9x2+1+−9x2=9x2−6x+1+−9x2

−bx+1=−6x+1

Step 3: Add -1 to both sides.

−bx+1+−1=−6x+1+−1

−bx=−6x

Step 4: Divide both sides by -x.

b = 6

Hope this helpss!!!

TV has a listed price of 623.98 if the sales tax rate is 8.5 find the total cost of the TV with the sales tax included​

Answers

Answer:

$677.02

Step-by-step explanation:

623.98 increase 8.5% =

623.98 × (1 + 8.5%) = 623.98 × (1 + 0.085) = 677.0183

find the number of inches needed to represent 300 miles if one fourth in =50 mi​

Answers

Answer:

1.5 in

Step-by-step explanation:

if one quarter of an inch represents 50 mi then and we know 50 x 6 = 300 then you would need 6 fourths of an inch or one and a half inches.

find the area of the shape

Answers

Answer:

787.5

Step-by-step explanation:

23×14=322

A=a+b /2h=15+34 /2·19=465.5

322+465.5=787.5

If two men can finish a piece of work in 30 days, then how many men will be required to finish the same work in 10 days?

Answers

If two men can finish a piece of work in 30 days, then how many men will be required to finish the same work in 10 days?

it would take a half of man to finish the same piece of work in 10 days.

6÷82,607 equals what

Answers

Answer:

0.00007263306

Step-by-step explanation:

Answer:

13,434

Step-by-step explanation:

HELP HELP HELP!!!!!!!
A piece of paper is 0.1 millimeter thick. When folded, the paper is twice as thick.

Find both the explicit and recursive rule for this geometric sequence.

Answers

Answer:

sorry i am struggling the same

Step-by-step explanation:

2+2=4

The answers to each part are mentioned below.

What is geometric sequence? What is an exponential function? Differentiate between equation and expression?  geometric sequence : A geometric sequence is a special type of sequence where the ratio of every two successive terms is a constant. This ratio is known as a common ratio.function : In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.expression : A mathematical expression is made up of terms (constants and variables) separated by mathematical operators.equation : A mathematical equation is used to equate two expressions.

Given is a piece of paper is 0.1 millimeter thick. When folded, the paper is twice as thick.

We can write the geometric sequence as -

0.1, 0.2, 0.4, 0.8 ......

The explicit formula for a geometric sequence is of the form -

        a{n} = arⁿ ⁻ ¹

        where [r] is the common ratio.

The recursive formula for a geometric sequence is of the form -a{n} = a{n - 1}r

For the geometric sequence -

0.1, 0.2, 0.4, 0.8 ......

The explicit formula will be : a{n} = (0.1)(2)ⁿ ⁻ ¹ The recursive formula will be : a{n} = 2a{n - 1}

If the paper is folded 7 times, we can write the thickness as -

y{7} = (0.1)(2)⁶ = (0.1) x (64) = 6.4

To surpass the Mount Everest, we can write -

8850 < (0.1)(2)ⁿ ⁻ ¹

(2)ⁿ ⁻ ¹ > 88500

(2)ⁿ/2 > 88500

(2)ⁿ > 177000

n log(2) > log(177000)

n > {5.25/log(2)}

n > 17.44

n > 18

Therefore, the answers to each part are mentioned above.

To solve more questions on functions, expressions and polynomials, visit the link below -

brainly.com/question/17421223

#SPJ2

substitute this equation x+3y=18 & -x-4y=-25

Answers

Answer:

 {x,y} = {3/7,-43/7}

Step-by-step explanation:

System of Linear Equations entered :

  [1]    x + 3y = -18

  [2]    -x + 4y = -25

Graphic Representation of the Equations :

   3y + x = -18        4y - x = -25  

 

 

Solve by Substitution :

// Solve equation [1] for the variable  x  

 

 [1]    x = -3y - 18

// Plug this in for variable  x  in equation [2]

  [2]    -(-3y-18) + 4y = -25

  [2]    7y = -43

// Solve equation [2] for the variable  y  

  [2]    7y = - 43  

  [2]    y = - 43/7  

// By now we know this much :

   x = -3y-18

   y = -43/7

// Use the  y  value to solve for  x  

   x = -3(-43/7)-18 = 3/7  

Solution :

{x,y} = {3/7,-43/7}

Find the Least Common Denominator of
12 and 3
10
5
35
70
O 17

Answers

Answer:

the least common denominator is 12

A shoe store uses a 50 percent markup for all of the shoes it sells . What would be the selling price of a pair of shoes that has a wholesale cost of 65$

Answers

Answer:

97.50

Step-by-step explanation:

65.00x50%=32.50

32.50+65.00=97.50

Answer:

/

Step-by-step explanation:

What rule is shown by this input/output table and coordinate plane?

A. add 3
B. subtract 3
C. divide by 2
D. multiply by 2

Answers

The answer to this problem is B. Subtract 3

Answer:

B

Step-by-step explanation:

subtract 3

input and output always input should be your first one.

So, 6-3=3  7-3=4  8-3=5

9-3=6 10-3=7

Hope this helps u:)

Pls mark brainlist

The function whose graph is shown below has the following characteristics.
K.
• Two absolute maxima
• One relative minimum
N
w
Er
A. True
(
B. False
PLEASE HELP

Answers

False. The absolute max isn’t shown because both ends go up forever. It only shows a relative max. It does show a relative min though. So it’s only half true.

please help and show work! :)

Answers

Step-by-step explanation:

how do you show work cuz I screenshot it but it won't let me write over the thing and put the answer so can I just type it out

I need to find the domain and range. Please help me

Answers

Answer:

(-infinity, -1) U (-1, 1) U (1, infinity)

(-4, -infinity) U (infinity, infinity) U (-infinity, -4)

Step-by-step explanation:

The price of a pair of jeans increases from £45.00 to £47.50.

What is the percentage increase in the price of the jeans?

Give your answer correct to 1 decimal place.

Answers

The price increase is 5.56%

7x^2 + 3 - 5x -\2x^2

Answers

Step-by-step explanation:

[tex] {7x}^{2} + 3 - 5x - {2x}^{2} \\ = {5x}^{2} - 5x + 3[/tex]

Find f(-2) this is due in 10mins help please

Answers

-2f

Step-by-step explanation:

move the -2 to the left of the f

|The angles in a triangle are in the ratio 1:1:4
|(a) Find the size of the largest angle?
b) what type of triangle is it?

Answers

Since the internal angle sum of a triangle is 180 degrees, and the angles are in ratio if 1:1:4, the angles with that's corresponding to the 1 will have value of 180/6=30 degrees.

The largest angle will have value 30*4=120 degrees.

This is an obtuse triangle because largest angle>90 degrees.

Make the following changes to the number 5.376: Make the 3 worth 10 times as much. Makethe5worth_1 asmuch.
10
Makethe7worth_1 asmuch. 10
Make the 6 worth 10 times as much. Write the new number.

Answers

Answer:

Step-by-step explanation:

your mom

Tom's Ice Cream Shop sold 7 sundaes with nuts and 5 sundaes without nuts. What is the ratio of the number of sundaes with nuts to the number of sundaes without nuts?

Answers

Answer:

20 : 28

5 : 7 = 20 : 28. And 7 is a fourth of 28.

house a and house b are very similar houses located in different parts of the city.The graph shows the value of each house for the first part of the year?

Answers

The answer is 17,000 it is simple addition. Ur name says Ur in highschool. I am in sixth grade. I just solved it. Just do me a favor and try next time.

Milagro needs to find an expression that represents the shaded area below. Which expression is equivalent to the area of the shaded portion of the rectangle?

Answers

Answer: I don’t know sorry

A family purchased tickets to a museum and spent a total of $45.00. The family purchased 5 tickets. There was $1.50 processing fee for each ticket. What is the cost of one ticket without the processing fee?

Answers

7.50$ for each ticket without the processing fee

what’s 3-4/7 equal as a fraction?!

Answers

Answer:

17/7 or 2 3/7

Step-by-step explanation:

3 is the same as 21/7. Subtract 21/7-4/7 to get 17/7.

Hope it helps!

Hey there. Hope you're having a pleasant morning/evening and wherever else in between. The answer of 3-4/7, as far as I can remember, is -1/7.

Need Help Fast!!!!
Will Mark Brainlist!!!!
Will Rate!!!!
9th Grade Honors Geometry

Answers

Answer:

The Correct Answer is 4!

Step-by-step explanation:

We know on triangle 1 that 2 of the sides are 2 and 4 and there a right angle, an angle that has 90 degrees

with this we can calculate the top angle to be 26.565 which combined on both sides is equal to 90, lust you will then have to subtract 90 minus 26.565 and you will get 63.435. Now that we know than the top angle is equal to 63.435, the 2nd angle is equal to 90 degrees which by the way resembles a right angle, and that 1 side of the 3 sides is 2 we can conclude though the triangle formula that...

X=4.

That's it Hope I Helped.

The answer is 4 please like

(-2) + (-4) =
5 7

(9) + (-4) =
10 9
me ayudan? :c

Answers

Answer:

I'm not sure what you're asking. But (-2) + (-4) = -6, and 9 + (-4) = 5

Step-by-step explanation:

-2- 4 = -6

9 - 4 = 5

A racecar driver completes a race 30 laps in 15 minutes at a constant speed. what is the driver's speed?

Answers

Answer:

200 mph/321 km/h if the track is 1 mile long and 100 mph/160 km/h if the track is 2 miles long

Step-by-step explanation:

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