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DIA [1.3K]
3 years ago
7

What is the answers of 2ft × 4ft

Mathematics
2 answers:
AleksandrR [38]3 years ago
5 0
8

8 is the answer because 4x2 by itself is 8
Thepotemich [5.8K]3 years ago
3 0

Answer:

8ft.

Step-by-step explanation: If you are finding he area, 2 times 4 equals 8, so the answer would be 8 feet.

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Find the sum of integers from 33 to 47:
ICE Princess25 [194]

Answer:

Step-by-step explanation:There are formulas to work this out, but you can also suss out an answer by a liberal application of critical thinking.

Okay, you want to add 51 + 52 + 53 + … + 99 + 100, right? (The … represents all the numbers in between, in case you were wondering.)

Well, that’s a total of 50 numbers. And if you know anything about addition, you know that it doesn’t matter what order you add them.

So you could also say 51 + 100 + 52 + 99 + 53 + 98 + … and so on.

Let’s see what happens. 51 + 100 = 151. So far so good.

Then, 52 + 99 also equals 151. And 53 + 98 also equals 151. Since there are 50 numbers, that’s 25 pairs that are going to add up to 151.

151 + 151 + 151 + 151 + … (21 more instances of 151).

So we can simplify our workload a bit. Instead of adding up all the numbers by hand, we can just multiply 151 by 25.

151 x 25 = 3775

From that, we can work out a generic formula that will allow you to add any sequence of numbers…without actually adding.

Let a be the first number in the sequence, and let n be the last number in the sequence. The number of numbers is (n - a) + 1. (You have to add 1, because if you just subtract, it’s like you’re losing the lowest number in the sequence).

So…you get the sum by adding the first and last number in the sequence, and then multiplying that result by half of the total number of numbers.

(a+n)((n−a)+12)  

an−a2+a+n2−an+n2  

−a2+a+n2+n2  

−a(a−1)+n(n+1)2  

Let’s check to see if it works!

−51(51–1)+100(100+1)2  

−51(50)+100(101)2  

−2550+10,1002  

75502  

3775  

Note that if the starting number were 1, the formula would simplify to  n(n+1)2

8 0
3 years ago
Read 2 more answers
D-13=6 <br> F-26=12<br> M+18=109<br> 56+k=231 <br><br> How do you solve these with steps
lapo4ka [179]

Answer:

D=6+13=19

Step-by-step explanation:

F=26+12=38

M=109-18=91

k=231-56=175

8 0
3 years ago
Find the LCM and GCF of 8<br>and 12<br>LCM<br>GCF​
Vesnalui [34]

Answer:

LCM: 24

GCF: 4

Step-by-step explanation:

LCM: guess and check by multiplying the largest number by an integer and dividing the product by the smaller number to check. 12*2=24 ... 24/8=3 ✓

GCF: opposite the other: guess and check by dividing the smaller number by an integer and multiplying the quotient by the larger number to check.

8 0
3 years ago
Read 2 more answers
Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solu
Dmitry [639]
The place where two equations intersect, has a certain value of y. This means that in the intersection point, the y-values of both expressions are the same, so y = y. Since y is also represented by the following equations, y = 4x and y = 2x - 2, the x-value of the intersection point is 4x = 2x - 2.
4 0
3 years ago
"On the Richter scale, the magnitude R of an earthquake can be measured by the intensity formula
Sergeeva-Olga [200]

Answer:

  B)  The earthquake measuring 4.5 on the Richter scale is about 32 times more intense than an earthquake measuring 3.

Step-by-step explanation:

Let Ra = log(Ia/Io), and Rb = log(Ib/Io). Then for ...

  Ra - Rb = 4.5 -3.0 = 1.5

  log(Ia/Io) -log(Ib/Io) = 1.5 . . . . . . . . . . . substitute the given expressions

  (log(Ia) -log(Io)) -(log(Ib) -log(Io)) = 1.5 . . . expand the logs

  log(Ia) -log(Ib) = 1.5 . . . . simplify

  log(Ia/Ib) = 1.5 . . . . . . . . write as a single log

  Ia/Ib = 10^1.5 ≈ 32 . . . . take the antilog

The ratio of intensities is about 32, corresponding to choice B.

8 0
3 years ago
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