4a.
An iron bar is heated. Its length, L, in millimetres can be modelled by a linear function, L=mT+c, where T is the temperature measured in degrees Celsius (°C).
At 150°C the length of the iron bar is 180 mm.
Write down an equation that shows this information.

4b.
At 210°C the length of the iron bar is 181.5 mm.
Write down an equation that shows this second piece of information.

4c.
At 210°C the length of the iron bar is 181.5 mm.
Hence, find the length of the iron bar at 40°C.

(really need most help on last one)

Answer:

stratified sampling

Step-by-step explanation:

Note, in the stratified sampling sample method, the population is divided into smaller strata or smaller groups, and then a sample is selected randomly.

In this scenario, the population is a day (24 hours), so dividing the population (day) into three parts; morning, afternoon, and evening represents the various strata. Hence, since Charlotte, the researcher measures her stress level at 2 randomly selected times during each part of the day, she would be using the stratified sampling method.

Answer:

8.714285    repeated

Step-by-step explanation:

Answer:

$5

Step-by-step explanation:

The real estate agent can buy 8 ads for a total of $56. Next you do $61 minus $56 which equals $5. If this answer helped you please consider giving it brainliest.

- •Trix•

( Yes I know my -•Trix• is not my user but its what I would change it to if I could but I can't, please address me as Trix while commenting or talking to me here.)

Step-by-step explanation:

insta I'd :- itz_anurag_r

anyone msg me on insta plzzz I'm bored at home ❤️

Answer:

Not denoting, involving, or arranged in a straight line.

Step-by-step explanation:

I looked it uo on google

im not SmArT

Answer:

Step-by-step explanation:

Sides are:

There are following number of posts on each of the sides:

Total number:

Choice G.

Out of sense, A and C are correct. Choice D seems more logical. For students studying medicine, that doesn’t mean they need a medical license.

Hope this helps! And mark this “brainliest!”

Answer:

A. F

B. D

C. C

D. E

E. G

F. G

G. D

Step-by-step explanation:

Answer: A. 9/4

              C. -1.75

              D. 1.75

              E -2      

              F-1

              -2 1/2  

Step-by-step explanation:

Answer:

Its D

Step-by-step explanation:

Answer:

The first shape

Step-by-step explanation:

If p = 2, insert the value of p.

2^3 = 2 x 2 x 2 = 4 x 2 = 8

so p^3 = 8

Answer:

It is a right triangle.

Step-by-step explanation:

bro isnt that a scalene triangle

Answer:

The answer is B, or the second one.

90 Adult tickets and 18 Children's tickets

Step-by-step explanation:

(90 x 15) + (18 x 9)

Answer:

8

Step-by-step explanation:

Answer\

Max has 8 because 48 divided by 6 is 8

Step-by-step explanation:

Answer: 1.6 in per hour

Answer:

hourly rate.

Step-by-step explanation:

As others have noted, it is a simple mathematical division problem (4/2.5) and the average is 1.6 inches per hour.

However, if this is for sizing civil works such as culverts or plumbing storm water drainage systems to mitigate flooding, the highest rate per hour must be known and usually the highest ten minutes rainfall rate expressed as an hourly rate.

For example, if 4.0 inches fell over that 2.5 hours, nothing says that a rain band did not dump 3 inches in the first hour, (3 inches per hour cumulative) or 0.75 inches in a ten minute period (4.5 inches per hour rate), with the remainder of the storm tapering off to lesser rates. So the average is correct, but the peak hour is much more important for practical purposes.

Answer:

72,66,264

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

I guesss

Answer:

A, C, E.

Step-by-step explanation:

Just did it.

Answer:

A (square root 13, 146.3 degrees)

C (-squareroot13, -33.7 degrees)

E (-3,2)

Answer:

X - B = -2

Step-by-step explanation:

You’re welcome

Answer:

Step-by-step explanation:

2,000 600 9 0.7 0.05

Answer:

D : Obtuse

Step-by-step explanation:

A right angle is 90 degrees.

An acute and obtuse angle are found by looking at the angle between the sides being looked at.

If the angle is GREATER i.e. Angle > 90 , then it is obtuse.

If the angle is LESS THAN i.e. Angle < 90 , then it is acute.

This angle is apparently greater than 90 degrees and therefore is obtuse.

Answer:

the first one is 4 i think and the last one is 48 percent. im not sure if the dotted line is a underline tho

Step-by-step explanation:

:))

Multiply the numerator and the denominator by 100 to get 48/100

which is the same as 48% .

A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word per cent means per 100. It is represented by the symbol “%”.

Given,

Fraction = 12/25

To convert into percentage

divide the number by 100 and multiply by 100.

= ((12/25)×100)/100

= 12 × 100/25×100

= 48/100

= 48%

Hence, 48% is the expression of 12/25 as percent gotten by multiplying and dividing with 100.

Learn more about percentage here:

https://brainly.com/question/14979505

#SPJ3

Answer:

y = 2 x - 8

Step-by-step explanation:

The image below shows proof that the points (4,0) and (7,6) lie on the equation y = 2 x - 8

Hope this helps! :)

Answer:

D

Step-by-step explanation:

It's an Icoseles triangle do the two bottom angles are equal. 50+ 50 = 100. All triangle angles add up to 180 so 180 - 100 = 80

Answer:

Option D - 80

Step-by-step explanation:

The triangle is an isosceles triangle, which means that two angles and sides are the same. That means that other side is also 50°. All the angles in a triangle add up to 180°. Since we know two of the angles, we should know what the angle x is. We can write it as 50 °+ 50° + x = 180°. You can add 50° and 50° to get 100°. Now you have 100° + x = 180°. Subtract 100° from both sides to get x = 80°.

Hope this helps! :)

Answer:

(3,1)

Step-by-step explanation:

Answer:

x ---- y

1 ---- 3

4 ---- 12

6 ---- 18

Step-by-step explanation:

Given

[tex]y = 3x[/tex]

Required

Create a table that represents this scenario

Because x represents time, x can not be negative. So, the domain of x is:

[tex]x \geq 0[/tex]

Assume [tex]x = 1[/tex]

[tex]y = 3 * 1 = 3[/tex]

Assume x = 4

[tex]y=3*4 = 12[/tex]

Assume x = 6

[tex]y=3*6 = 18[/tex]

Hence, the table is:

x ---- y

1 ---- 3

4 ---- 12

6 ---- 18

Answer:

You need more deatils, did you work 24 hours per day or 9 hours. my question is how many hours a day did you work?

Answer: B) Corresponding sides of the two triangles have the ratio of 4:1, which proves SSS similarity. The length of the lake is 132m.

Step-by-step explanation: Similar Triangles are triangles with corresponding sides proportional to each other.

One way to determine if two triangles are similar is a theorem called Side-Side-Side Similarity Theorem or SSS similarity and it states that two triangles are similar if corresponding angles are equal and corresponding sides are proportional.

The triangles below are similar and they obey this theorem because we observe that the angles are the same and the corresponding sides are proportional:

[tex]\frac{big}{small}=\frac{212}{53}=\frac{60}{15}=4[/tex]

So, the ratio of bigger triangle and smaller triangle is 4:1.

With that ratio and suppose length is represented as L:

[tex]\frac{L}{33} =4[/tex]

L = 132

The length of the lake is 132m.

Thus, the answer for this question is

1) The similarity of the triangles is proved by SSS similarty;

2) Ratio of proportion is 4:1;

3) Length of the lake is 132m;