Answer:
Option B, Americium-241, is the right answer.
Step-by-step explanation:
A device which senses smoke usually as an indicator of fire is known as a smoke detector.The two most common types of smoke detectors are the Ionization chamber and photoelectric smoke indicators. Many of these smoke detectors comprise some amount of americium-241, which is a radioactive substance. These smoke detectors respond immediately to fires that give off some smoke.solve 1/2x + 7 = x - 3
Answer: x=20
Step-by-step explanation:
1/2x + 7 =x -3 add 3 to both sides
+3 +3
1/2x + 10 = x Subtract 1/2x from both sides
-1/2x -1/2x
10 = 1/2x
x = 20
Answer:
[tex]x=20[/tex]
Step-by-step explanation:
We can solve for x by simplifying the equation until we have x isolated on one side.
[tex]\frac{1}{2}x + 7 = x-3[/tex]
Subtract 7 from both sides:
[tex]\frac{1}{2}x = x-10[/tex]
Subtract x from both sides:
[tex]-\frac{1}{2}x = -10[/tex]
Multiply both sides by -2:
[tex]x = 20[/tex]
Hope this helped!
PLEASE HELP ME Mathmath
Answer:
871 and 1/2 feet is correct
Step-by-step explanation:
yesterday,it's was negative 7 degrees Fahrenheit outside today, it is 14 degrees Fahrenheit warmer. Click on today's temperature
Answer:
Step-by-step explanation:
-7+14=7
D.7
How to find solutions to Discriminat
Answer:
The discriminant is the expression b2 - 4ac, which is defined for any quadratic equation ax2 + bx + c = 0. Based upon the sign of the expression, you can determine how many real number solutions the quadratic equation has. If you get a positive number, the quadratic will have two unique solutions
Step-by-step explanation:
hope it help
Answer:
D = b² - 4ac
Step-by-step explanation:
if,
ax² + bx + c = 0
flying against the wind, a jet travels 4600 miles in 5 hours. flying with the wind, the same jet travels 4200 miles in 3 hours. what is the rate of the jet in still air and what is the rate of the wind?
Answer:
The rate of the jet in still wind is 1160 MPH and the rate of the wind is 240 MPH.
Step-by-step explanation:
Distance equals rate times time (d = rt)
Against the wind, the rate is:
4600 = r * 5
r = 4600/5 = 920 MPH
With the wind, the rate is:
4200 = r * 3
r = 4200/3 = 1400 MPH
Let W be the rate of the wind in MPH. We know that:
(rate of the jet against the wind) + (rate of the wind) = (rate of the jet with the wind ) - (rate of the wind), so:
920 + W = 1400 - W
2W = 480
W = 240 MPH
And the speed of the jet in still air would be:
1400 - 240 = 1160 MPH
.There is a 1/8 chance of a spinner landing on pink. Which statement is true? A. it is certain that the spinner lands on pink. B. it is impossible for the spinner to land on pink. C. it is likely that the spinner lands on pink. D. it is unlikely that the spinner lands on pink.
Answer:
it is unlikely that the spinner lands on pink.
Step-by-step explanation:
[tex]1- \frac{1}{8}\\ = 7/8[/tex]
There is 7/8 chance it is not going to land on pink
Use the figure to the right to find the value of PT. T is the midpoint of PQ PT=7x+9 and TQ=9x-5
Answer:
58
Step-by-step explanation:
Since, T is the mid point of PQ,
[tex] \therefore PT = TQ \\
7x + 9 = 9x - 5\\
9 + 5 = 9x - 7x\\
14 = 2x \\
\frac{14}{2} = x\\
7 = x \\
x = 7\\
PT = 7x + 9 = 7\times 7 + 9= 49 + 9 \\
PT= 58
[/tex]
Solve the following equation for D. Be sure to take into account whether a letter is
capitalized or not.
Dm3 + n=r
Answer: capitalized
Step-by-step explanation:
24 - 4 x 2 + 4b = 20 - 16
Answer:
b = -3
Step-by-step explanation:
Solve for b:
4 b - 4 2 + 24 = 20 - 16
-4×2 = -8:
4 b + -8 + 24 = 20 - 16
Grouping like terms, 4 b - 8 + 24 = 4 b + (24 - 8):
4 b + (24 - 8) = 20 - 16
24 - 8 = 16:
4 b + 16 = 20 - 16
20 - 16 = 4:
4 b + 16 = 4
Subtract 16 from both sides:
4 b + (16 - 16) = 4 - 16
16 - 16 = 0:
4 b = 4 - 16
4 - 16 = -12:
4 b = -12
Divide both sides of 4 b = -12 by 4:
(4 b)/4 = (-12)/4
4/4 = 1:
b = (-12)/4
The gcd of -12 and 4 is 4, so (-12)/4 = (4 (-3))/(4×1) = 4/4×-3 = -3:
Answer: b = -3
log 5 +3 log 2-log4÷log10
●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●
Hi my lil bunny!
❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙
Let's simplify step-by-step.
[tex]Log (5) + (3 log (2)) - \frac{log(4)}{log(10)}[/tex]
[tex]= 0.69897 + 3(log (2)) - \frac{log (4)}{log (10)}[/tex]
[tex]= 0.69897 + (3) (0.30103) - \frac{log (4)}{log(10)}[/tex]
[tex]= 0.69897 + 0.90309 - \frac{log (4)}{log(10)}[/tex]
[tex]= 1.60206 - \frac{log(4)}{log(10)}[/tex]
[tex]= 1.60206 - \frac{1.60206}{log (10)}[/tex]
[tex]= 1.60206 - \frac{1.60206}{1}[/tex]
[tex]= 1.60206 - 0.60206[/tex]
[tex]= 1[/tex]
❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙
●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●
Have a great day/night!
❀*May*❀
Solve the system by graphing
- 3x-y=2
solution (-2,0)
solution (0-2)
solution (2,0)
solution (02)
Answer:
(0,-2)
Step-by-step explanation:
Plug in each value for the equation
-3(0) - (-2) = 2
0 - (-2) = 2
2=2
Neal opened a savings account 11 years ago with a deposit of $2,335.69. The account has an interest rate of 4.3% compounded daily. How much interest has Neal earned? (3 points)
$1,412.52
$2,436.12
$1,375.75
$3,748.21
Answer: $1,412.52
Step-by-step explanation:
Formula to calculate the accumulated amount if P principal invested for t years at a rate of interest r that compounded daily is given by:-
[tex]A=P(1+\dfrac{r}{365})^{365t}[/tex]
Given: P= $2,335.69
r= 4.3%= 0.043
t= 11 years
Then,
[tex]A=2335.69(1+\dfrac{0.043}{365})^{365\times11}\\\\=2335.69(1+0.000117808219178)^{4015}\\\\=2335.69(1.000117808219178)^{4015}\\\\= 2335.69(1.6047566747)\\\\=3748.09044309\approx3748.21\\\\\Rightarrow\ A=\$3748.21[/tex]
Interest earned = A-P
= $3748.21- 2335.69.
= $1412.52
Hence, Neal earned $1,412.52 as interest.
what integer is greater than -5
Answer:
-4,-3,-2,-1,0,+1,+2,+3..........
Step-by-step explanation:
-4 is greater than -5.
What is Number system?A number system is defined as a system of writing to express numbers.
An integer is the number zero, a positive natural number or a negative integer with a minus sign.
We need to find the integer which is greater than -5.
When we look into the number line we get an idea that the numbers with minus values are smaller than the positive values.
The greatest number with minus sign is smaller than the smallest number with minus sign.
-4 is greater than -5.
Not only -4 but the integers -4,-3,-2, -1, 0,1,2..... are greater.
Hence, -4 is greater than -5.
To learn more on Number system click:
https://brainly.com/question/22046046
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At a baseball game, hot dogs cost $2.25 and drinks cost $1.75. The total cost, t, for h hot dogs and d drinks can be described by the equation t=2.25h+1.75d. If Costas spent $18.25 and bought 5 hot dogs, how many drinks did he buy?
Answer:
He bought 4 drinks
Step-by-step explanation:
18.25= 2.25(5)+1.75d
18.25= 11.25+ 1.75d
18.25-11.25= 7
7= 1.75d
7/1.75
4=d
Answer:
4 drinks
Step-by-step explanation:
t = 2.25h + 1.75d
T = Total Cost
H = Hotdogs
D = Drinks
We have our total cost, which is $18.25 dollars
18.25 = 2.25h + 1.75d
We know Costas bought 5 hotdogs, so replace h with 5 and multiply :
2.25(5)
==> 11.25
Now that 11.25 dollars has been made, let's see how much money we need left to fit for the drinks.
18.25 - 11.25
==> 7
We need 7 dollars worth of drinks, so divide the cost by the amount we need to have.
7 / 1.75
==> 4
Castos needs to buy 4 drinks.
The value 191.5638 rounded to the nearest hundredth is
191.564
191.5600
191.56
200
Answer:
191.56
Step-by-step explanation:
Given
191.5638
Required
Approximate
Approximating to the nearest hundredth implies that, only to digits after the decimal point is needed
This is:
191._ _
The third digit after the decimal point will approximated using the approximation rule;
Since, the third digit after the decimal point (3) is not up to 5, it'll be approximated to 0 and added to the second digit (6)
So, we have:
191.5 _
The next digit is calculated as 6 + 0 = 6
Hence, the full approximated number is 191.56
Combine the like terms to create an equivalent expression. 5x - x
Answer:
the answer is 4x
Step-by-step explanation:
you are subtracting 1x
is -0.23 rational number whole number or integers
Answer:
rational number
Step-by-step explanation:
A whole number does not have a decimal part so it cannot be a whole number
Integers are whole numbers that are positive and negative plus zero
-.23 can be written as the ratio of integers
-23/ 100 so it is a rational number
Answer:
Rational
Step-by-step explanation:
A whole number does not have a decimal part so it cannot be a whole number
Integers are whole numbers that are positive and negative plus zero
-.23 can be written as the ratio of integers
-23/ 100 so it is a rational number
Help me please!!! Weekly time card help. $11hr
Answer: 8hrs
Step-by-step explanation:
Ernie walked 1 1/4 miles from his cabin to a park, then 1 1/2 miles around the park, and then back to his cabin. How many miles did he walk
Answer:
4 miles
Step-by-step explanation:
1 1/4 there + 1 1/2 around + 1 1/4 back= 4 miles
Solve for X.........
Answer:
Hey there!
There is this equation, which states that the angle created by an inscribed angle is half the measure of the arc.
Thus, we can write: 60=5x-5
65=5x
x=13
Let me know if this helps :)
Answer:
x= 13
Step-by-step explanation:
Inscribed Angle =1/2 Intercepted Arc
30= 1/2 (5x-5)
Multiply each side by 2
60 = 5x-5
Add 5 to each side
65 = 5x
Divide by 5
13 =x
Select all of the expressions that are not equivalent to ax+bx+ac+bc. A.) x(a+b)+c(a+b) B.) a(x+c)+b(x+c) C.) (b+a)(c+x) D.) ax+bc E.) (a+b)(x+c) F.) ab(x+c)
Answer:
C.) (b+a)(c+x) = True
E.) (a+b)(x+c) = True
Step-by-step explanation:
all others are not equal.
sam is baking cakes at her parents bakery. she gets paid $20 a week in addition to $4 for every cake she bakes. she made $60 this week. write an equation to show how many cakes sam baked this week
Answer:
She made 10 additional cakes
Step-by-step explanation:
x = additional cake
20 = base salary
y = 4x + 20
60 = 4(x) + 20
40 = 4(x)
x = 10
What is the rule for this pattern? 8, 4, 2, 1 Divide by 2. Multiply by 2. Subtract 4. Add 4.
Answer:
divide by 2
Step-by-step explanation:
because if you subtract 4 -8 =you would get 4then 4-4=0 so eliminate subtract 4 and you can tell the number isnt going higher so you wouldnt add or multiply your welcome
the sum of 81 and a number is greater than 4 times the same number
Answer: n=9
Step-by-step explanation:
81 = n>4*n
81 = 9(>4)*9
81 = 9*9
Kevin mowed 12 lawns and earned a total of $60.
Which rate represents the amount of money earned per lawn?
Answer:
$5
Step-by-step explanation:
$60 earned for moving 12 lawns
Amount of money per lawn is:
$60/12= $5Answer is amount per lawn is $5
Answer:
$5
or
$5 / 1 lawn
Step-by-step explanation:
The process is quite simple - especially since you already have half of the answer. The question says money per lawn. The creator of the problem gave away a lot of the answer. They already tell us the rate. Now all ou have to do is plug the numbers in:
Money per lawn
Money / lawns (The slash is used to represent per)
What is the money? $60. So plug that in:
$60 / lawns
How many lawns? 12. Plug that in:
$60 / 12 lawns
Now, all you have to do is either simplify the fraction or divide the denominator by the numerator - whichever one you prefer. In that case, the rate can be any of the following:
$5
$5 / 1 lawn
Hope this helps! Tell me if I am wrong!
if the length of rectangle changes from 148.5cm to 144 cm. Find the percentage
change in the length.
Answer:
Original height = 144 cm
Increase height = 148.5 cm
Change in height = 148.5 - 144 = 4.5 cm
Percentage change = change/original ×100
= (4.5 / 148.5) × 100
= 3.03%
The height increased by 3.03%.
Step-by-step explanation:
Answer:
3%
Step-by-step explanation:
148.5 - 144 = 4.5
[tex]\frac{Difference}{Initial Amount}[/tex] × 100
[tex]\frac{4.5}{148.5}[/tex] × 100 = 3.03 ≈ 3%
I would really appreciate it if you would please mark me brainliest!
Have a blessed day!
If x + 4 is one factor of x3 + 64, what is the other factor?
Answer:
[tex]\Huge \boxed{(x^2 - 4x + 16)}[/tex]
Step-by-step explanation:
x³ + 64
64 is a perfect cube. Rewrite 64 as 4³.
x³ + 4³
Apply sum of cubes formula:
a³ + b³ = (a + b)(a² - ab + b²)a = x
b = 4
(x + 4)(x² - (x)(4) + 4²)
(x + 4)(x² - 4x + 16)
(x² - 4x + 16) is the other factor.
Strawberries cost $21.25 for 4 pounds. Find the unit rate. Round to the nearest cent if necessary.
Answer:
$5.31/lb
Step-by-step explanation:
Since 4 pounds cost $21.25, 1 pound of strawberries will cost 21.25 / 4 ≈ 5.31, therefore, the unit rate is $5.31/lb.
Answer:
$5.31 per pound.
Step-by-step explanation:
$21.25 for so
%21.25/4= $5.31
The answer is $5.31 per pound.
the location at which two lines, line segments, or rays intersect
Answer:
vertex
Step-by-step explanation:
took the assignment a bit ago
1 x 10^12 = 9 x 10^8 (8/d^2) solve for d
Answer: Go here https://quickmath.com/webMathematica3/quickmath/equations/solve/basic.jsp
Step-by-step explanation:
It will show you how