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3 years ago

How do you make 8 out of 8, 12, 2, 7, 4

Mathematics

1 answer:

muminat3 years ago

3 0

Answer:

8 = 2 ( (8-7) + (12/4) )

Step-by-step explanation:

2 ( (8-7) + (12/4) )

2 ( ( 1 ) + ( 3 ) )

2 ( 4 ) = 8

It takes a bit of thinking and writing it out on paper to come up with an equation that works and you should definitely practice it so it becomes easier

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Find the value of x, given cos 0 = 0.4<br><br><br><br> PLEASE HELP!!!!!! And explain if possible

elena-14-01-66 [18.8K]

Answer:

$x=30$

Step-by-step explanation:

For each right-angled triangle:

$\cos\theta=\frac{cathetus \ adjacent \ \theta}{hypotenuse}$

Because $\cos \theta=0.4, \ \ cathetus\ adjacent \ \theta \ = \ 12, \ \ \ hypotenuse=x$

we have an equation

$0.4=\frac{12}x$

multiplying both sides by x, we get $0.4x=12$

dividing both sides by 0.4 and $x=\frac{12}{0.4}$

using calculator, we divide 12 by 0.4

and finally x=30

8 0

2 years ago

Colin invest in £5000 into his bank account. He receives 10% per year simple interest. How much will Colin have after 3 years?

pav-90 [236]

Answer:

£6655

Step-by-step explanation:

Given data

Principal= £5000

Rate= 10%

Time = 3 years

FInal Amount A=???

The expression for the compound interest is given as

A=P(1+r)^t

substitute

A=5000(1+0.1)^3

A=5000(1.1)^3

A=5000*1.331

A= £6655

Hence the final Amount is £6655

5 0

2 years ago

Half the sum of X and Y decreased by 1/3 why

Allushta [10]

What is the question here.
(1/2)(X+Y)-(1/3)

8 0

2 years ago

Construct an explicit rule in function notation for the arithmetic sequence represented in the table. Then determine the value o

strojnjashka [21]

Answer:

After 11 weeks, Darnell′s savings account will have a total of $8,360.

Step-by-step explanation:

The data provided is as follows:

n: 1 2 3 4

f (n): 260 360 460 560

Consider the data for f (n).

The series f (n) follows an arithmetic sequence with a common difference of 100 and first term as 260.

The nth term of an arithmetic sequence is:

$a_{n}=\frac{n}{2}[2a+(n-1)d]$

Compute the value of f (11) as follows:

$f(11)=\frac{11}{2}[(2\times260)+(11-1)\times 100]$

$=5.5\times[520+1000]\\\\=5.5\times 1520\\\\=8360$

Thus, after 11 weeks, Darnell′s savings account will have a total of $8,360.

5 0

2 years ago

Find the missing angle. x=?

OlgaM077 [116]

Answer:

Here we can see they are vertically opposite angles so x = 35°

7 0

3 years ago

Read 2 more answers