let x be how far up the wall ladder reaches
by Pythagoras theorem
x^2+5^2=13^2
x^2 =(13^2)-(5^2)
x= square root of 144
x= 12 or x =-12(rej,x>0)
hence ladder reaches 12 foot up the wall
Solution for 3n-2=15+3n equation:
Simplifying
3n + -2 = 15 + 3n
Reorder the terms:
-2 + 3n = 15 + 3n
Add '-3n' to each side of the equation.
-2 + 3n + -3n = 15 + 3n + -3n
Combine like terms: 3n + -3n = 0
-2 + 0 = 15 + 3n + -3n
-2 = 15 + 3n + -3n
Combine like terms: 3n + -3n = 0
-2 = 15 + 0
-2 = 15
Solving
-2 = 15
Couldn't find a variable to solve for.
This equation is invalid, the left and right sides are not equal, therefore there is no solution.
Answer:
B. 1,4
Step-by-step explanation:
1. substitute 4x for y in the second equation since we know y=4x(to find x)
6x-4(4x)=-10
2.solve for x
6x-4(4x)=-10
-4•4x=-16x
6x-16x=-10
6x-16x=-10x
-10x=-10
-10x/-10=-10/-10
x=1
3.substitute 1 for x in either equation(since x=1)to find y
y=4(1)
y=4
x,y=1,4
hope this helps!
The scientific notation of 70, 030, 000.
To find the scientific notation of this value
<span><span>
1. </span>We first
move the period which separates the whole number from the decimal number which
is located after the numbers of the given value.</span>
<span><span>2. </span>We move it
in the very recent order number which is seventy million, seven and zero.</span>
<span><span>
3. </span>It becomes
7.003</span>
<span><span>4. </span>Thus we
count how many moves we did from the tens to the ten million order place.</span>
<span><span>
5. </span>7.003 x
10^7 </span>
Answer:
126/210, 189/210, 98/210, 70/210
Step-by-step explanation:
find the lowest common multiple
of 5,10,15 and 21=210
42*3, 21*9, 14*7, 10*7
126/210, 189/210, 98/210, 70/210
