All categories

3 years ago

Linda soent 3/4 of her saving on furniture and the rest on a TV. If the TV cost her $200, what were her orginal savings?

Mathematics

1 answer:

garri49 [273]3 years ago

8 0

She would have spent $600 on the furniture, and $200 on the T.V.

Her original savings were $800.

You might be interested in

Pls help meeeeeeeeeeeeeeeeeeeeeeeeeeee

Dennis_Churaev [7]

1/25 i don’t know if this is right but here you go

5 0

3 years ago

Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore, and recorded number of pages in each textboo

jeka94

Answer:

y = -0.85 + 0.09x; $49.82

Step-by-step explanation:

1. Calculate Σx, Σy, Σxy, and Σx²

The calculation is tedious but not difficult.

$\begin{array}{rrrr}\mathbf{x} & \mathbf{y} & \mathbf{xy} & \mathbf{x^{2}}\\526 & 52.08 & 27394.08 & 276676\\625& 59.00 & 36875.00 &390625\\589 & 56.12 & 33054.68 & 346921\\409 & 25.72 & 10519.48 & 167281\\489 & 34.12& 16684.68 & 293121\\500 & 53.00 & 26500.00 &250000\\906 & 76.48 & 71102.88 & 820836\\251 &26.08 & 6546.08 & 63001\\595 & 50.60 & 30107.00 & 354025\\719 & 68.52 & 49265.88 & 516961\\\mathbf{5609} & \mathbf{503.72} &\mathbf{308049.76} & \mathbf{3425447}\\\end{array}$

2. Calculate the coefficients in the regression equation

$a = \dfrac{\sum y \sum x^{2} - \sum x \sum xy}{n\sum x^{2}- \left (\sum x\right )^{2}} = \dfrac{503.7 \times 3425447 - 5609 \times 308049.76}{10 \times 3425447- 5609^{2}}\\\\= \dfrac{1725466163 - 1727851103.84}{34254470 - 31460881} = -\dfrac{2384941}{2793589}= \mathbf{-0.8537}$

$b = \dfrac{n\sumx y - \sum x \sumxy}{n\sum x^{2}- \left (\sum x\right )^{2}} = \dfrac{3080498 - 2825365.48}{2793589} = \dfrac{255132}{2793589} = \mathbf{0.09133}$

To two decimal places, the regression equation is

y = -0.85 + 0.09x

3. Prediction

If x = 563,

y = -0.85 + 0.09x = -0.85 + 0.09 × 563 = -0.85 + 50.67 = $49.82

(If we don't round the regression equation to two decimal places, the predicted value is $50.56.)

4 0

4 years ago

Segment AB is on the line y − 4 = −5(x − 1), and segment CD is on the line y − 4 = one fifth(x − 5).

never [62]

Answer:

They are perpendicular because they have slopes that are opposite reciprocals of −5 and one-fifth.

Step-by-step explanation:

slope is the number next to x

8 0

3 years ago

Four friends went out to breakfast. Two of them ordered omelets for $5.49 each, and the other two ordered French toast for $6.29

yanalaym [24]

Answer:

Jill would pay 5.945

Reason:

You add up 5.49 and 6.29 and get 11.78. Then you would divide that by 4 and get 2.945. If Jill were to pay the tip then they would have to pay three dollars would add three dollars onto their 2.945 and they would have to pay 5.945 instead of 2.945.

5 0

3 years ago

In your own words,define a system of equations

lesya692 [45]

First you solve for X then substitute the number you got for X and then solve for Y.

8 0

3 years ago