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Allushta [10]
3 years ago
15

Can someone help me again please

Mathematics
2 answers:
Vikki [24]3 years ago
8 0
A.) 23 degrees Celsius

b.) y=23-5x

btw I'd rearrange this as

y= -5x+23

If you want to find changes in y, let's compare differences when we change the x.

For example, if x=1

y= -5(1)+23

-5+23=18

So, when x=1, y=18

Now, let's have x=2

y= -5(2)+23

-10+23=13

So, when x=2, y=13

Let's compare the difference in y by subtraction.

18-13=5

So, with every kilometer that you fly up from the surface, the temperature decreases by 5°C

So, in the box, put -5
cestrela7 [59]3 years ago
4 0

Answer:

i)  = 23 °C

ii) = 4.4° C

Step-by-step explanation:

i) The temperature on the surface of the planet.

At the surface of the planet the height is Zero

Therefore, X = 0

Thus; using the equation, the temperature, y will be;

y = 23 - 5x

y = 23 - 5(0)

 <u> = 23 °C</u>

ii) the temperature change for every kilometer from the surface,

From the equation;

y = 23 - 5x

we take, y to be 1

Therefore;

1 = 23 -5x , subtracting 23 on both sides we get

-22 = -5x

x = -22/-5

<u>  = 4.4° C</u>

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Pls help I don’t understand this!
Alborosie

Answer:C

Step-by-step explanation:

5 0
3 years ago
Two lines intersect (see image below)
klemol [59]

Answer:

c-24

a-156

Step-by-step explanation:

a=180-24( angles on s straight line)=156

c= 24 opposite angles

3 0
3 years ago
Please help!!<br> Each pair of polygons is similar. Find the value of x.
Simora [160]

Answer in fraction form: x = 55/4

Answer in decimal form: x = 13.75

Both forms are equivalent, but they say it in a slightly different way.

===========================================================

Work Shown:

AC/QY = CD/YW

(x+5)/15 = 5/4

4(x+5) = 15*5

4x+20 = 75

4x = 75-20

4x = 55

x = 55/4

x = 13.75

------------

Explanations:

  • The first step is possible because the polygons are similar. Similar figures have their corresponding sides be in the same proportion or ratio. Note how side AC has the double red angle (at point A) and a single red angle (point C). The side QY has the same idea in the same order. This is why AC corresponds to QY. The ratio AC/QY is the same as CD/YW.
  • In the second step, I plugged in the expressions that the diagram shows. This is the substitution property.
  • On step 3, I cross multiplied. The general format is A/B = C/D cross multiplies to A*D = B*C.
7 0
3 years ago
Read 2 more answers
Sean bought a laptop and a printer. He sold both items for £1,500 getting £1,350 just for the laptop. Sean made a 24% profit on
vitfil [10]

Answer:

36

Step-by-step explanation:

Sean purchased a printer and laptop

He sold both for 1,500

He sold the laptop at 1,350

Therefore the cost of the printer can be calculated as follows

1500-1350

= 150

24/100×150

= 0.24×150

= 36

Henve the cost of the printer is £36

4 0
3 years ago
The following equation is given.
SashulF [63]

5x² - 9x + 45 = 0

Δ = b² - 4.a.c

Δ = (-9)² - 4 . 5 . 45

Δ = 81 - 4. 5 . 45

Δ = -819

There's no real root.

7 0
3 years ago
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