QUESTION 23 Determine if the given solution is correct. If it is not, find the solution. Is -5 the solution to x+6=5-4? no; x=7 yes no; x=3 no; x=15
Answers
Answer:
yes
Step-by-step explanation:
x+6 = 1
x = -6 + 1
x = -5
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Bicycle rental on the seawall at the beach cost a mandatory minimum of $5 for the first hour and then $4 for each additional hour. When three or more bikes are rented together, the owner gives a 20% discount on the additional hours. If Marty and his family rent four bicycles, identify the expression which represents the cost.A) 12.8x + 20x B) 12.8x + 20 C) 12.8x + 16x D) 32.80x
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7^x=13
Answers
Explanation:
Really what you're looking for is a value of x that, when 7 is raised to that power, will give you 13.
putting the equation in terms of f and g (any variables will do) :
7^x = f(x)
13= g(x)
using the rule if f(x)=g(x) then ln f(x) = ln g(x)
If any function f of x equals g of x then the natural log of f of x equals the natural log of g of x.
Therefore:
ln (7^x) = ln (13)
With logs, if there is something raised a power, the exponent can simply be moved to the front, so:
ln (7^x) = x * ln 7
note: *=multiplication
therefore your new equation is
x*ln 7 = ln 13
if you divide both sides by ln 7, you get that
x = 1.318123223
but you only need four sig figs (significant figures) so your answer is
x = 1.318
*Note = the answer is 1.318 only because those are the first four digits of the answer. I suggest looking up rules for sig figs if you do not know what they already are
HOPE THAT HELPS
_V :)
Answers
Answer:
Step-by-step explanation:
Answers
Sin 45 = X / 14
X = 14 * sin45
X = 9.9 foot
Therefore ladder will reach to 9.9 foot height in the building
Three times a number, x, increased by four is equal to five times the number, x. Which equation can be used to solve for x?
What is the value of x in the equation 0.2(x + 1) + 0.5x = –0.3(x – 4)?
Answers
Answer:
Part 1)
Part 2)
Part 3)
Part 4)
Step-by-step explanation:
Part 1)
Let
x-----> the number
The expression" Five times a number decreased by nine is equal to twice the number increased by ", is equal to the algebraic expression
Part 2) we have that
Let
x------> the number of nickels
y-------> the number of dimes
z-------> the number of quarters
Multiply by both sides
------> equation A
-----> isolate the variable y
------> equation B
------> equation C
substitute equation B and equation C in equation A
Part 3) we know that
Let
x------> the number
The equation that represent the expression is equal to
Part 4) we have
Multiply by both sides
The third one is 3x+4=5x
Answers
80% of 40 = 80% * 40 = 80/100 * 40 = 32
The correct result would be 32.
hopefully this helps! (:
80% of 40 equal 32
Answers
Answer: For number 8, x=6. For number 9, x=7. For number 10, x=15
Step-by-step explanation:
#8:
Angle 16x-6 corresponds to the 90 degree angle. Therefore, they are equal.
16x-6=90
Add six: 16x=96
Divide by 16: x=6
#9
Angle 12x-4 and angle 10x+10 correspond. Therefore, they are equal.
12x-4=10x+10
Subtract 10x: 2x-4=10
Add four: 2x=14
Divide by 2: x=7
#10
Angles 7x and 5x+30 are alternate exterior angles. Therefore, they are equal.
7x=5x+30
Subtract 5x: 2x=30
Divide by 2: x=15