A change jar contains nickels dimes and quarters totaling and amount of $1.90 the amount of nickels is one more than twice the n
2 answers:
Answer:Given below
Step-by-step explanation:
We know Nickel is 5% of a dollar and dime is 10% of dollar
while quarter is 25% of dollar
Given
Let x be the no. of Dimes
therefore nickels be 2x+1
Quarter=
Also total worth of coins is $1.90
x(0.1)+(2x+1)0.05+
115x+35=380
x=3
therefore no of nickels =2*3+1=7
Quarter=5
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Answer:
(negative 7 x + 4)(negative 7 x minus 4)
Step-by-step explanation:
Consider two real numbers a and b. A difference of squares involving a and b is usually given as;
The difference of the two squares above can be factored to yield;
This implies that in order to have the difference of squares we must have a product involving the difference and the sum of the numbers.
The expression;
(negative 7 x + 4)(negative 7 x minus 4) can also be written as ( 4 - 7x) ( -4 - 7x)
( 4 - 7x) ( -4 - 7x) = ( 4 - 7x) (-1( 4 + 7x)) = -1 *( 4 - 7x) ( 4 + 7x)
Expanding the last expression yields;
-1 (16 + 28x -28x - 49x^2) = -1 (16 - 49x^2) = 49x^2 - 16 which is in deed a difference of squares
ANSWER
Find out the how old was we when he died.
To proof
Let us assume that the age of the Adam be x
As given
Adam lived a quarter of his life as a boy as fifth as a young man, a third in middle-age and 13 years in retirement.
L.C.M of denominator i.e ( 4,5,3) =60
than the equation becomes
60x = 15x + 12x +20x +780
60x - 47x = 780
13x = 780
x = 60 years
therefore the Adam age when he died is 60 years.
Hence proved
we know that
Step
in the right triangle XYZ
Applying the Pythagorean Theorem
Find the value of ZY
Step
in the right triangle XYZ
Find tan°
we know that
in this problem
opposite side angle is ZY
adjacent side angle is XZ
so
therefore
the answer is