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2 years ago

I don't understand this question

Mathematics

1 answer:

padilas [110]2 years ago

7 0

Answer:

105 rooms

Step-by-step explanation:

quarter=1/4

total rooms=140

rooms cleaned=1/4×140=35

140-35=105

therefore total rooms remaining are 105 rooms

hopes this helps

brainliest pls

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Expand (x+2y)^2 plzzzzzzzz

deff fn [24]

(x + 2y) ^2

(x + 2y) (x + 2y)

x^2 + 2xy + 2xy + 4y^2

= x^2 + 4xy + 4y^2

8 0

4 years ago

3. Mrs.Galicia bought 3 tacos and 2 sodas and paid $9.75. The next day she went back and bought 5 tacos and 1 soda and paid $12.

andrey2020 [161]

Answer:

a) 3x + 2y = 9.75, 5x + y = 12.75 is the required system of equations.

b) The cost of 1 soda = $1. 5

c) The cost of 1 taco = $2.25

Step-by-step explanation:

Let the cost of each taco = $x

Let the cost of each soda = $y

Now, according to the question:

3x + 2y = $9.75

5x + y = $12.75 are the required system of equations.

Now, substituting the value of y = 12.75 - 5x in (1).

⇒The equation 3x + 2y = 9.75 becomes 3x + 2(12.75 -5x) = 9.75

or, 3x - 10x + 25.5 = 9.75

or, -7x = -15.75

⇒ x = 15.75/7 = 2.25

Hence, the cost of 1 taco = $x = $2.25

Now, y = 12.75 - 5x

= 12.75 - 5(2.25) = 12.75 - 11.25 = = 1.5

or, y = $1.5.

Hence, the cost of 1 soda = $y = $1.5

3 0

3 years ago

Which number is10 more then 894

Solnce55 [7]

Add 10 to 894.

894 + 10 = 904

7 0

3 years ago

Read 2 more answers

For which of the following scatterplots is the correlation between x and y closest to −1 ?

Snezhnost [94]

Answer:

Scatter plot attached below.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

If there is any alteration in the value of one variable, the value of the other variable is altered in a fixed proportion. The correlation amid them is known as perfect correlation.

In statistics, a perfect positive correlation is represented by +1 and -1 indicates a perfect negative correlation.

Negative correlation is a relationship amid two variables in which one variable rises as the other falls, and vice versa.

The scatter plot for the correlation between x and y closest to −1 is attached below.

4 0

4 years ago

Draw the graph with its equation -2x+7y=14?

allochka39001 [22]

Answer:

Step-by-step explanation:

Since the slope is 2/7, and it has the y-intercept of 2, the first point would be (0,2)

5 0

3 years ago