Answer:
b
Step-by-step explanation:
A chemist is using 337 milliliters of a solution of acid and water. If 13.2% of the solution is acid, how
many milliliters of acid are there? Round your answer to the nearest tenth.
Answer:
44.5 mL
Step-by-step explanation:
337 × 13.2%
= 337 × 0.132
= 44.484 mL
= 44.5 mL (1dp)
–8(6+3)
-83
Please help me
Answer:
-155
Step-by-step explanation:
-8\cdot \:9-83
-72-83
=-155
Larry and Cathy study for a total of 24 hours each week. Larry studies 3 less than twice the hours than Cathy studies. How many hours does Cathy study per week?
ATQ
[tex]\\ \sf\longmapsto x+2x-3=24[/tex]
[tex]\\ \sf\longmapsto 3x-3=24[/tex]
[tex]\\ \sf\longmapsto 3x=24+3[/tex]
[tex]\\ \sf\longmapsto 3x=27[/tex]
[tex]\\ \sf\longmapsto x=9[/tex]
Answer:
ᎪꪀsωꫀᏒ9 hours Cathy study per week
Step-by-step explanation:
=> according to the question
➪ x+2x-3=23
➪ 3x-3=24
➪ 3x=24+3
➪ 3x=27
➪ x= 27/3
➪ x= 9
match the inequality with its graph
Let f(x)=8x−6. What is the value of f(12)?
Answer:
f(12) = 90
Step-by-step explanation:
This is more of a notation problem than anything else.
The x on the left means that the variable is x. That sounds weird I know, but it starts out this way.
f(variable) = 8*variable - 6
Where you see the word variable, you put the letter x and that gives you the question.
f(x) = 8*x - 6
That is math shorthand for whatever you see on the left, like an x or in this case 12, you put the value 12 in for x on the right. It will look like this.
f(12) = 8*12 - 6 Now it just becomes a calculator problem.
f(12) = 96 - 6
f(12) = 90
yolanda's yoga class charges a $20 membership fee and $20 per visit.
write an expression that represents the cost of "x" visits: C=_______
how many visits would it take for the two costs to be the same?
(use your expressions and make them equal to each other and solve)
The 2 expressions: 10x + 100 and 20x + 20
20x + 20:
20 dollars per visit (20x) ; 20 dollar fee (20)
10x + 100 = 20x + 20 Subtract 10x from both sides
100 = 10x + 20 Subtract 20 from each side
80 = 10x Divide by 10
x=8A map of Pennsylvania has a scale of ¾ inch to 25 miles. If Pittsburgh and Philadelphia are 9 inches apart on the map, how many miles apart are the two cities?
Answer: 300
Step-by-step explanation:
0.75 inches : 25 miles
we can times 0.75 by 12 to get 9, we have to do the same thing on the other side.
9inches : 300 miles
Lourdes plans to jog at least 1.5 miles. Write and solve an inequality to find x, the number of hours that Lourdes will have to jog..
Answer:
An inequality compares two or more variables by using the <, >, ≤, or ≥ signs.
The number of hours Lourdes will have to jog is 0.4 hours
From the given parameters:
Lourdes plans to jog for at least a distance of 1.5 miles
If Lourdes can jog averagely at the speed of 3.75 mph
Then,
the inequality that can represent the information can be written as:
= 1.5 miles ≤ 3.75 (x) miles/hour
Solving the inequality;
= 1.5 ≤ 3.75 (x)
Making (x) the subject of the formula, we have:
x = 0.4 hours
Therefore, we can conclude that the number of hours lourdes will have to jog is 0.4 hours
Step-by-step explanation:
In a particular part of the Volta lake, there is a population of 100000 tilapia. The number of tilapia is decreasing at a rate of 10% per year due to pollution from a human settlement on the shores of the Volta lake in this area.
2. Copy and complete the table below to show the number of tilapia P after 1, 2 and 3 years
Number of years (t) 0 1 2 3
Number of tilapia (N)
Criterion B 1-2
b) Write an exponential model for the number of tilapia N after t years
Criterion B 3-4
c) When the population of tilapia falls below 25000 it is at a ‘critical level’. Write an inequality and calculate how long it will take for this lake to be at a critical level.
Answer:
?????
Step-by-step explanation:
tập nghiệm của phương trình 3tan+√3=0
Answer:
if 0° ≤ x ≤ 360°
x = 150° or x = 330° (5/6 π , 11/6 π)
if x can be beyond 2π (360°) , above or below
x = 5/6 π + 2nπ or x = 11/6 π + 2nπ
Step-by-step explanation:
3 tanx = -√3
tan x = - 1/√3
if 0° ≤ x ≤ 360°
x = 150° or x = 330° (5/6 π , 11/6 π)
if x can be beyond 2π (360°) , above or below
x = 5/6 π + 2nπ or x = 11/6 π + 2nπ
Help me :( please help me
Answer:
22.84, 5.83
Step-by-step explanation:
Pythagoras theorem states that: a^2+b^2=c^2
So, for red triangle, it will be: 9^2+21^2=b^2
81+441=b^2
522=b^2
square root of 522=b
22.84=b
For purple one,
3^2+5^2=a^2
9+25=a^2
34=a^2
square root of 34=a
5.83=a
Elaine old bicycle had tires with 12 inch diameter. Her new bicycle has tires with 16 inch diameter. What is the difference in the same conference of the tires
Answer:
12.56 inches
Step-by-step explanation:
(1.5x10^-5)+(3.5x10^-2) what is this written in scientific notation??
Answer:
0.035015x
Step-by-step explanation:
what is the sum of the prime numbers of 420 do not repeat any prime factors A 15 B 16 C.17 D. 18 E. 19
Answer:
C)
Step-by-step explanation:
Prime factorization of 420 = 2 × 2 × 3 × 5 × 7 = 22 × 3 × 5 × 7.
If you take...
2 + 2 + 3 + 5 + 7...
You would get 17.
Hope this helps! :) Good Luck!
-kiniwih426
Collin spent $34 on a new video game. How much money does he need to earn in order to have a net change of $0?
PLEASE HELP QUICK :) multiple choice.
Which of the following functions has a factor of x + 9 ?
A: f (x) = x^3 - 8x^2 - 11x + 18
B: f (x) = x^3 + 10x^2 + 7x - 27
C: f (x) x^3 + 10x^2 + 7x - 18
D: f (x) = x^3 - 8x^2 - 11x + 27
Answer:
C. f(x) = x³ + 10x² + 7x - 18Step-by-step explanation:
If the function has a factor of x + 9, then the function will have a zero output at x = -9
Lets verify:
A. f(-9) = (-9)³ - 8*(-9)² - 11*(-9) + 18 = -1260, NoB. f(-9) = (-9)³ + 10*(-9)² + 7*(-9) - 27 = -9, NoC. f(-9) = (-9)³ + 10*(-9)² + 7*(-9) - 18 = 0, YesD. f(-9) = (-9)³ - 8*(-9)² + 11*(-9) + 27 = -1449, No
Barry buys a new washing machine.
The value of the washing machine depreciates by 20% each year.
(a)
Barry says 'after 5 years the washing machine will have no value'.
Barry is wrong. Explain why.
Barry wants to work out the value of the machine after 2 years.
(b)
By what single decimal number should Barry multiply the value of the machine when new?
Answer:
The machine decreases in value by 20% each year.
After 1 year the machine is worth only .8 of its original value.
The machine will only decrease by .2 * (.8 A) in the second year not .2 * A where A is the original amount.
A1 = .8 A
A2 = .8 A1 = .64 A value of machine after 2 years
.8 is the value Barry needs when the machine is new
.8^n never goes to zero
After 10 years value = .8^10 A = .11 A of its original value
A? B? C? or D? help meeeeee
Answer:
b) -5/9
Step-by-step explanation:
yeah-ya.... right?
Write and solve an inequality that represents the values of x, in feet.
The perimeter is less than 16 feet.
Answer:
x < 16 ft
Step-by-step explanation:
Perimeter = x
If it is less than 16, the equation is:
x < 16
-Chetan K
please help due today NO LINKS WILL REPORT
Answer:
Step-by-step explanation:
i think that the answer is a, because the def of natural numbers match's and there all integers.
PLEASE HELP DUE TODAY NO LINKS WILL REPORT
Answer:
The first option
Step-by-step explanation:
Because you cannot have a negative squared root
Answer:
a.
Step-by-step explanation:
I had this question before lol.
value of 3 to the power of -2
Answer:
it would be .1111111111
Hope this helps
Answer:
.1 repeating
Step-by-step explanation:
.1 repeating= .11111111111
Hope this helps.
help please i need it with explanation
Answer:
10. x = -23
Step-by-step explanation:
-3.8x - 5.9x = 223.1
-9.7x = 223.1 (-3.8 minus 5.9)
x = -23 (223.1 divided by -9.7)
Answer:
12. x = 70
Step-by-step explanation:
(-3/5)x - (7/10)x + (1/2)x = -56
-(4/5)x = -56 ( -3/5 minus 7/10 plus 1/2)
x = 70 (-56 divided by -4/5)
9 - 5n < -4n + 9 or 9n + 4 < 7n - 4
10. Name the line three ways.
HELP THIS IS DUE SOON 30 POINTS
Answer:
x = 4
Step-by-step explanation:
f(x) = 4x-5
11 = 4x-5
4x-5 = 11
4x = 11+5
= 16
x = 16÷4
= 4
Look at the figures. How can you prove the triangles are congruent?
is it
A) ABC= DEF by the SAS postulate
B) It is not possible to determine if the triangles are congruent
C) ABC = DEF by the SSS postulate
Answer:
SAS
Step-by-step explanation:
AB ≅ DE Given
AC ≅ DE Given
∠ A and ∠B are right angles Given
∠A ≅ ∠B All right angles are ≅
Write the value of
[tex]1 - 2 \cos {}^{2} c[/tex]
Step-by-step explanation:
1-2cos²c.
> (cos²c+sin²c)-2cos²c. (cos²c+sin²c=1)
> cos²c+sin²c-2cos²c
> sin²c-cos²c.
is your correct answer.
hope this helps you.
solve 10x-3(x-7)=x+39
Answer:
[tex]10x-3\left(x-7\right)=x+39[/tex]
[tex]-3\left(x-7\right)[/tex]
[tex]-3x+21[/tex]
[tex]10x-3x+21=x+39[/tex]
** Combine like terms ↓ **
[tex]10x-3x=7x[/tex]
** Subtract 21 from both sides ↓**
[tex]7x+21-21=x+39-21[/tex]
[tex]7x=x+18[/tex]
** Subtract x from both sides ↓ **
[tex]7x-x=x+18-x[/tex]
[tex]6x=18[/tex]
**Divide both sides by 6 ↓*
[tex]\cfrac{6x}{6}=\cfrac{18}{6}[/tex]
[tex]x=3[/tex]
Find the slope of the line that passes through (20, -37) and (68, -56).
i believe it would be -19/48