Mathematics High School

NEED HELP ASAP!

Betsy buys three lamps and two end tables and pays $520. Her friend Tina buys two lamps
and RETURNS an end table and only pays $20. What do the lamps and end tables cost?

Answers

Answer 1

9514 1404 393

Answer:

lamp: $80end table: $140

Step-by-step explanation:

If we let x and y represent the costs of a lamp and end table, respectively, the two purchases can be written as ...

  3x +2y = 520

  2x -y = 20

__

These equations can be solved many ways. If we use "elimination", we can add twice the second equation to the first to eliminate y:

  (3x +2y) +2(2x -y) = (520) +2(20)

  7x = 560 . . . . simplify

  x = 80 . . . . . . divide by 7

  y = 2x -20 = 2(80) -20 = 140

The cost of a lamp is $80; the cost of an end table is $140.

Related Questions

HELP!!!!!
A quadratic function passes through the points (0,5), (2,3), and (3,5). Which function represents the same relationship?

Answers

Answer:

h(x)=x^2-3x+5

Step-by-step explanation:

The angles of a triangle are in an extended ratio of 5:7:3. What is the measure of the
largest angle?

Answers

Answer:

84°

Step-by-step explanation:

Let the measures of the triangle be 5x, 7x, 3x.

By interior angle sum postulate of a triangle.

5x + 7x + 3x = 180°

15x = 180°

x = 180°/15

x = 12°

7x = 7*12°= 84°

Measure of the largest angle = 84°

Find the difference.
60°
30°
40"
50"
40

Answers

40 doesnt end with the circle

11+(-3)-1/8j-3/8j+7=

Will give reward if right

Answers

Answer:

J = 7.5

Step-by-step explanation:

* This is going off of the estimate that the = sign means the equation is = to 0, as there is no value after the equal sign. *

First, start off by adding all of the like numbers.

11 + (-3) + 7 = 8 + 7 = 15

- 1/8 j - 3/8 j  = - 4/8 j.

Combining those two sums, we get:

15 - 4/8 j = 0

Subtract 15 from both sides,

-4/8 j = -15

Simplify -4/8 to -1/2, and then to -0.5

-0.5j = -15

Divide.

-15/-0.5 = 7.5

When you divide a negative number by another negative number, you get a positive. Therefore, the answer is J = 7.5

If the number after the = sign IS NOT 0, then when you get to 15 - 0.5j, just do the steps but with a number that isn't 0.

Write this fraction in an equation using words: 2/3

Answers

Answer:

two-thirds plus five=five and two-thirds

Step-by-step explanation:

Two divided by three

what's 2+2???????????:]​

Answers

Answer:

4

Step-by-step explanation:

Will mark brainliest

Answers

Answer: Desmos will answer this question for you :) just input the functions

Step-by-step explanation:

Last year, the average monthly revenue at the Richmond Times newspaper was $82,980. So far this year, the average has been 25% more than last year. What is the average revenue so far this year?

Answers

Answer:

103,725

Step-by-step explanation:

82,980x.25+82,980

#1.
м.
#
#
4.
3
70
6
N
P
70°
R
S
8
^_^
BY
-+

Answers

Answer: flip a table

Step-by-step explanation:

stand GRAB TABLE THEN FLIP

Your answer is right up there

37x+2=38x find measure

Answers

Answer:

x = 2

Step-by-step explanation:

[tex]37x + 2 = 38x\\=> 38x-37x=2\\=> x = 2[/tex]

Answer:

x=2

Step-by-step explanation:

37x + 2 = 38x

<=> 2 = 38x - 37x

<=> 2 = x

So x = 2

Factoring Quadratics

1. X^2-25=0

Answers

(x+5)(x-5)

when you have a negative square number, you do + and - the square root :) it would not work if you were given +25

7th grade
HELP MEEEE!
due today

Answers

You got it on the correct spot good job and good luck hun

Answer:

A.

Step-by-step explanation: Because as you see the dot is past the 2 and is on the third line out of 4, the 4th line is the next number.

Brianna is getting materials for a chemistry experiment. Her teacher gives her a container that has 0.25 liter of a liquid in it. Brianna needs to use 0.4 of this liquid for the experiment. How much liquid will Brianna use?

Answers

Answer: 0.1 liter

Step-by-step explanation:

From the question, we are informed that Brianna teacher gives her a container that has 0.25 liter of a liquid in it and she needs to use 0.4 of this liquid for the experiment.

The amount of liquid that Brianna will use will be:

= 0.4 × 0.25 liters

= 0.1 liter

Determine the 6th term of the following sequence.

1215, 405, 135, 45,...

Answers

Answer:

5

Step-by-step explanation:

Answer:

I think its 5

Step-by-step explanation:

because you divide them by 3 to get the next answer and 44 divided by 3 is 15 and 15 divided by 3 is 5

please solve will give brainiest

Answers

Step-by-step explanation:

BODMAS

155.5-5.5*20.7

155.5-113.85

=41.65

Answer:

41.65

Step-by-step explanation:

155.5-(5.5*20.7) order of operation

155.5-113.85=

41.65

PLEASE HELP!

Identify the center and radius of the circle (x+4)^2 + (y-2)^2=16

Answers

The equation for a circle is x^2+y^2=r^2 so the radius is the square root of 16 which is 4. Then you take y-2 and set it equal to 0. This gives you y=2 as the y coordinate of the center. You then set x+4 equal to 0 which gives you x=-4 which is the x coordinate of the center. So the radius is 4 and the center is at (-4,2)

What is the y-intercept of the function f(x) = -2/9x + 1/3x?

Answers

Answer:

Step-by-step explanation:

HELP PLSSSSSS

Examine the figure below.
Determine which of the following angle measures are correct. Select all that apply.

Answers

C is one of them I don’t have the time to solve rn because I’m busy but I know C is for sure one.

Answer:

I believe the answer is A, C

My mom was at the store with a 15% off coupon. She spent $25.00 with 7% sales tax. How much is the total?

Answers

Answer:

The answer is $22.74

Step-by-step explanation:

simplify the expression
2x/(x+4) + 8/(x+4)

Answers

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[tex] \frac{2x}{x + 4} + \frac{8}{x + 4} = \\ [/tex]

[tex] \frac{2x + 8}{x + 4} = \\ [/tex]

[tex] \frac{2(x + 4)}{x + 4} = 2 \\ [/tex]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

5 4/8 = ? I really need help

Answers

if you mean in decimal form, it will be 5.5

mL1 = 26°
and
mL3 = 53°

What is
mL4

Answers

Answer:

53 + 26

=79 is right

therefore m angle 4 is 79

which number line shows an integer and its opposite?

Answers

Answer:

B

Step-by-step explanation:

An integer is a whole number (not including 0).  An integer's opposite can be found by adding a negative sign to the front of it.  A negative integer's opposite would be positive, while a positive integer's opposite would be negative.  

PLEASE HELP FAST ITS PRETTY EASY FOR BRIANLIST

Answers

5^0.5 or 5^(1/2)

Fractional powers are basically just roots with the bottom fraction being the amount of roots and the top fraction being the power.

5^0.5 = 5^(1/2) = sqrt(5)

Answer:

5^(1/2)

Step-by-step explanation:

5^(1/2)

A girl was asked to multiply a number by 7/8.instead she divided the number by 7/8and got the result 15 more than the correct result.what is the number​

Answers

Answer:

x=56

Step-by-step explanation:

number = x

7/8x=8/7x-15

Add 15

15+7/8x=8/7x

Subtract 7/8

15=15/56x

x=56

The number is 56

Hope this helps!

SOMEONE HELP ME WITH GEOMETRY PLEASE!!!!


Find the coordinates of the orthocenter of the triangle with the given vertices.

A(−1, 2), B(9, 2), C(−1, −3)

Answers

Answer:

is there a picture or something?

Answer:

it's (-1,2)

Step-by-step explanation:

Discount and Tax examples for math... HELP!!!!

Answers

Answer:

Cathy bought a bicycle in Washington, where the sales tax rate was 6.5% of the purchase price. What was (a) the sales tax and (b) the total cost of a bicycle if the purchase price of the bicycle was $392?

When 0.3(4x – 8) – 0.5(–2.4x + 4) is simplified, what is the resulting expression?

A. -4.4
B. 1.2x - 2.4 + 1.2x - 2
C. 2.4x - 0.4
D. 2.4x - 4.4

Answers

Answer:

It's the B

Step-by-step explanation:

0.3*4=1.2

0.3 *(-8)=-2.4

-0.5*(-2.4x)= 1.2x

-0.5*4=-2

So it's 1.2x - 2.4 + 1.2x - 2

Answer:its B

Step-by-step explanation:

I just took the quiz

(-4, -7) and (-6, 9) in slope-intercept form. Show work

Answers

Answer:

Equation of line in slope-intercept form is: y = -8x-39

Step-by-step explanation:

Given points are:

(-4, -7) and (-6, 9)

The slope-intercept form is given by the equation

[tex]y = mx+b[/tex]

Here m is the slope of the line and b is the y-intercept.

m is found using the formula

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

Here

(x1,y1) = (-4-7)

(x2,y2) = (-6,9)

Putting the values in the formula

[tex]m = \frac{9+7}{-6+4} = \frac{16}{-2} = -8[/tex]

Putting slope in general equation

[tex]y = -8x+b[/tex]

Putting (-6,9) in the equation

[tex]9 = -8(-6)+b\\9 = 48+b\\b = 9-48\\b = -39[/tex]

Putting the value of b we get

[tex]y = -8x-39[/tex]

Hence,

Equation of line in slope-intercept form is: y = -8x-39

i need assistance lol

Answers

I’m pretty sure it’s exponential. I hope this helped!
Please leave a brainliest mark and a thanks (:
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