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densk [106]
3 years ago
8

Find the value of the variable.

Mathematics
1 answer:
MatroZZZ [7]3 years ago
7 0

Answer:

sin 30=14/x

x=14*2

x=28

and

x=√{28²-14²}

x=14√3

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the sum of Ages of two brother is 18the elder brother is 10 years older than younger brother then what are the ages of those bro
NemiM [27]

Answer:

Age of younger brother is 4 years..

And age if elder brother is 14 years.

Step-by-step explanation:

Let us denote 'x' as the age of smaller brother,

then, the age of younger brother will be x+10 years.

x+x+10 = 18

2x+10 = 18

2x = 18-10

2x = 8

x = 8/2

x = 4

Age of younger brother is 4 years.

Age of elder brother = x + 10

= 4 + 10

= 14 years.

4 0
3 years ago
A sewing machine is at a 20% off sale. The original price was $340. How much does the sewing machine cost at a 20% off sale?
Anvisha [2.4K]

Answer:

272$

Step-by-step explanation:

Since it is at a sale of 20% off that means that we will have to subtract 100% from 20% which is 80%

Now to find the exact value, we will have to multiply 80%, or 0.80 with 340

0.80*340= 272$

Therefore our answer is 272$

                     - Hope this helped :)

-Brainliest is most appreciated :)

4 0
3 years ago
Read 2 more answers
Somebody please help me with the question
Lubov Fominskaja [6]
50 is the answer.
We know that 60% is equal to 0.60. We don’t need to write the extra 0 in the end, so we can just write 0.6
. So, the question is saying that 30 is 0.6 of the total number of marbles. This means that 30 is 0.6 times the total number of marbles.
To write this in equation form, I will use x to represent the total number of marbles:
30=0.6x
Now, we need to solve for x.
On one side of the equation we have only x, and in the other side we only have a number.
So, to solve it, we need to divide both sides of the equation by the coefficient on x, which is 0.6.
30/0.6 = 0.6/0.6x
Solve:
30/0.6 = x
x = 50
The answer is 50.
3 0
3 years ago
I need help i dont understand​
solmaris [256]

Answer:

D. 1/3^3

Step-by-step explanation:

Divide 3/3 as usual and get 1.

When dividing exponents, you are actually subtracting them. 5-8 = -3.

D is the answer because positive exponents in the denominator of the fraction is the same as a negative exponent in the numerator.

5 0
3 years ago
Read 2 more answers
Annie's parents have offered her two different allowance options for her 10 week summer vacationAnnie's mom offers Annie an allo
vfiekz [6]
<h3>Annie's mom's offer is better because Annie will have more money at the end of weeks.</h3>

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️

5 0
3 years ago
Read 2 more answers
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