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Liula [17]
3 years ago
8

The swimming pool is open when the high temperature is higher than 20 Celsius. Laney tried to swim on Monday and Thursday which

was three days later. The pool was open on Monday but it was closed on Thursday. The high temperature was 30 Celsius on Monday, But decreased at a consistent rate in the next three days.
Mathematics
1 answer:
const2013 [10]3 years ago
6 0

Answer:30° - 3d ≤ 20°

Step-by-step explanation:

We have to represent the rate of temperature decrease in degrees .We will represent this by "d" which stands for degree.

According to the question , temperature decreased at a constant rate in the next three days

Therefore , the total decreasing in three days = 3d degree i.e 3 *d=3d

Temperature on Monday = 30°

Then the temperature on Thursday is this = 30° - 3d

Since, The swimming pool is open when the high temperature is higher than 20°=≤20

= 30° - 3d ≤ 20°

This is the required inequality to determine the rate of temperature decrease in degrees Celsius per day, "d"from Monday to Thursday.

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The complete question related to this found on brainly (ID:16812154) is stated below:

Triangle EFG is dilated by a scale factor of 3 centered at (0, 1) to create triangle E'F'G'. Which statement is true about the dilation?

E(0,5) F(1,1) G(-2,1) H(0,1)

a) segment EH and segment E prime H prime both pass through the center of dilation.

b)The slope of segment EF is the same as the slope of segment E prime H prime.

c) segment E prime G prime will overlap segment EG. segment

d) EH ≅ segment E prime H prime.

Step-by-step explanation:

∆EFG = Original image

∆EFG is dilated to give ∆E'F'G'

∆E'F'G' = New image

Scale factor = 3

Center of dilation = (0,1) = H(0,1)

Coordinates ∆EFG : E(0,5) F(1,1) G(-2,1)

To determine the statement that is true about the dilation from the options,

First we would make a diagram on the coordinates of ∆EFG and center of dilation (H).

Find attached the diagram.

Length GF = 3unit

Length G'F' = 3×scale factor = 9unit

Length EH = 4unit

Length E'H' = 4×scale factor = 12unit

Then we would move 3units to the left on same line from G to get the coordinate of G'(mark the point).

Also move 3units to the right on same line from F to get the coordinate of F'(mark the point).

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Now move 8units to the top from E to get the coordinate of E'(mark the point).

From this you get length E'H' = 12unit

Draw lines connecting the three points to get ∆E'F'G'

See diagram for better understanding

From the diagram, EH and E'H' both pass through (0,1). The other options are wrong.

Therefore, Segment EH and segment E prime H prime both pass through the center of dilation (A)

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