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3 years ago

Write a description of how a diagram can help you solve 2×40

Mathematics

2 answers:

notsponge [240]3 years ago

6 0

A multiplication chart is a type of diagram witch can help you solve that. BTW 2*40=80.

nasty-shy [4]3 years ago

4 0

Let me explain like this .Suppose There are 40 people gathered somewhere for attending an event.Each Person has to be given 2 sweets for their arrival or for showing their presence in the event. Now 40 other woman joined them..Instead of getting two sweets each of them got one sweet.

Solution: 2 sweets × 40 people = 1 sweet × 80 people = 80

2nd Way:

There are 40 rooms in a building.In Each room we have to fix two bulbs. So How many bulbs are there in the building.

Solution →→→2 bulbs × 40 room = 80 bulbs

Diagram is depicted below for two parts.

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What is BE ?<br> Please explain it in full dont just give me an answer

posledela

There are two methods to solve this problem. One of them is the typical method and the other one is the short-cut. I will explain the shortcut

Short-cut:
This method is quick and easy, and works with ALL triangles, which is why I suggest you use this. You make proportions. Since the triangles are similar, we can use CPCTC. Thereafter,
$\frac{AD}{CE}= \frac{DB}{EB}$

Now, you just need to identify the terms, substitute, and solve for the unknown, which would be k.

$\frac{12}{3} = \frac{k+5}{k-7} \\ 12(k-7)=3(k+5) \\ 12k-84=3k+15 \\ 9k=84+15 \\ 9k=99 \\ k=11$ [/tex]

So we found k, but it is asking for BE. Therefore, plug in the value of k, which is 11, into the expression for BE, which is k-7.

BE=K-7
k=11
BE=11-7
BE=4

Your answer is 4.

5 0

3 years ago

I need help with number 52! And I haven’t done 51

Wittaler [7]

Answer:

51. A/P = (2.2t +25)/(2.6t +29)

52. A/P for t=0 is about 0.862

A/P for t=4 is about 0.858

Step-by-step explanation:

51. The ratio of the two given functions is ...

r(t) = A/P

r(t) = (2.2t +25)/(2.6t +29)

52. Fill in the required numbers and do the arithmetic.

r(0) = (0 +25)/(0 +29) = 25/29

r(0) ≈ 0.862

r(4) = (2.2·4 +25)/(2.6·4 +29) = 33.8/39.4

r(4) ≈ 0.858

The salary ratio is approximately flat at 0.86 over the 4-year period. It is declining slightly each year.

5 0

3 years ago

Which expression is eqivalent to 4(9+3)

Black_prince [1.1K]

You could do

36+12

4*12

4*9+12

(4*9)+(3*4)

and many more!

7 0

2 years ago

How to solve 0.5x +78.2 =287

Inessa [10]

You can subtract 78.2 from 287 to get the x value alone. Your new expression will look like this:
.5x=208.8
Next you divide by .5 (or multiply the reciprocal 1/.5 depending on how you were taught)
x=417.6

Hope that helps!!

8 0

3 years ago

Read 2 more answers

I WILL MARK BRAINLIEST TO CORRECT ANSWER. Assignment Summary

den301095 [7]

Answer:

23,990 5,940 800

0 30,640 61,280 122,560

23,990 8,940 800 3,880 34,520 69,040 138,080

6 0

2 years ago