Keisha had $54 when she went to a bookstore. She
had $12 left after buying some books. Which
equation can be used to find a, the amount Keisha
spent on books?
54 - a = 12
B
a - 54 = 12
a +54 = 12
12 + 54 = a
the perimeter of the rectangular window glass is 26 dm. if the area is 36 sq dm, what are the dimensions of the window glass?
Answer:
w = 4 and l = 9 or
l = 4 and w = 9
Step-by-step explanation:
let l = length
let w = width
2l + 2w = 26
lw = 36
l = 36/w
2(36/w) + 2w = 26
72/w + 2w = 26
(72 + 2w²) ÷ w = 26
cross-multiply:
2w² + 72 = 26w
2w² - 26w + 72 = 0
factor:
2(w² - 13w + 36) = 0
2(w - 4)(w - 9) = 0
w = 4 and l = 9 or vice versa
(3-2i)(1 + 7i)
What is the product?
Answer:
17+19i
Step-by-step explanation:
[tex](3-2i)(1+7i) =3+21i-2i-14i^2=3+19i+14=17+19i[/tex]
Emmie rolls a dice three times. What is the probability that she will only roll numbers greater than two on all of her rolls?
Insurance company records indicate that 12% of all teenage drivers have been ticketed for speeding and 9% for going through a red light. If 4% have been ticketed for both, what is the probability that a teenage driver has been issued a ticket for speeding if they ran a red light?
Answer:
four out of 100 (4%)
Step-by-step explanation:
NEED HELP ASAP WILL GIVE BRAINLIEST REAL ANSWERS ONLY PLZ WILL REPORT FAKE ANSWERS
Answer:
A. Midline is -1
Step-by-step explanation:
5th grade math. correct answer will be marked brainliest
The answer is b
saddsadsadas
Answer:
B
Step-by-step explanation:
Cause he added 24.76 more pounds to the 3.6 pounds. So you can take 24+3=27 and you might think C, but 0.76+0.6 that equals more than 1, so 27+1=28, and B has 28 as its answer, so its B
B
Points H and I are located on the coordinate plane at (-2,8) and (-2, 11).
What is the distance between the two points?
Answer:
3
Step-by-step explanation:
distance required=11-8=3
PLSSSSS HELLLPPPP. Determine the perimeter of this shape.
Answer:
The perimeter is 26cm
Step-by-step explanation:
Given
See attachment for shape
Required
The perimeter
This implies that, we add up the length of all sides (see attachment 2 for complete lengths)
So, we have:
[tex]Perimeter = 6cm + 4cm + 2cm + 3cm + 4cm + 7cm[/tex]
[tex]Perimeter = 26cm\\[/tex]
The triangles below are similar. Find the length and round to the nearest tenth if necessary.
Answer:
x=48
Step-by-step explanation:
You start with the values of 4 and 16. Figure out how many times 4 goes into 16, which is 4. (4*4=16)
Now, since 4 is multiplied by itself to reach the value of 16, 12 will also be multiplied by 4 to give you the value of x.
DeShawn and his three best friends found some money buried in a field. If the total amount they found was $327, how much would each person get if they split it evenly?
A researcher selects a random sample of size n from a population and uses the collected data to compute a 95% confidence interval for the mean of the
population. If the same data were used to compute a second confidence interval, which of the following produces a confidence interval with a larger margin
of error?
Answer:
I wish I know the answer
Step-by-step explanation:
lemme try again
Can someone help me solve this please?
Answer:
56
Step-by-step explanation:
just use you brain you can count
Answer:
i think its 99
Step-by-step explanation:
Degree and Radian Measures
Convert the angle to radians. Leave as a multiple of /pi (π)
610°
a. 61/pi/36
b. 25/pi/18
c. 61/pi/18
d. 61/pi/9
Please select from the best choices provided
Answer:
C. 61/pi/18
Step-by-step explanation:
I calculated logically
Jada ran 15.25 kilometers. Han ran 8,500 meters. Who ran farther?
Answer:
15.25 km =15,250 m
so Jada ran further
Answer:
Jada ran farther
Step-by-step explanation:
First, convert 8,500 to kilometers.
8,500 ÷ 1,000 = 8.5
15.25 > 8.5
Have a wonderful day!
What is a complete list of factors of each term in the expression 16a+18ab
Answer:
Step-by-step explanation:
the last answer looks good
Plzz Helppp Meeeeeee
Answer:
C
Step-by-step explanation:
I am pretty sure I dont know.
Answer:
C
squares in c don't cover the whole area thus won't help
A motorboat travels 385 kilometers in 7 hours going upstream and 455 kilometers in 5 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?
Answer:
Rate of the boat in still water 73 mi/hr
Rate of the current 18 mi/hr
Step-by-step explanation:
Calculation to determine the rate of the boat in still water and the rate of the current
Let B represent the speed of the boat in still water.
Let S represent the speed of the stream
Speed upstream = B-S.
Speed downstream = B+S.
Using the equation for distance
Distance=Rate * Time
Upstream
(B-S)7 = 385
(B+S)5= 455
Simplify first:
B-S=385/7
B-S = 55
B+S=455/5
B+S = 91
Solve by elimination. Add the two equations.
2B=55+91
2B = 146
B=146/2
B = 73 mi/hr
Substitute this into either equation and solve for S.
B+S = 91
73+S = 91
S=91-73
S = 18 mi/hr
Therefore the rate of the boat in still water is 73 mi/hr and the rate of the current is 18 mi/hr
14. A company uses many different delivery
services. The probability that any given parcel
will be sent by the ABC Speedy Delivery Service
is 0.71. The probability that the parcel will arrive
on time given the ABC Speedy Delivery
Company was used is 0.93. If a parcel is
randomly selected, find the probability that it will
be sent with the ABC Speedy Delivery Company
and arrive on time.
Answer:
0.6603 = 66.03% probability that it will be sent with the ABC Speedy Delivery Company and arrive on time.
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
In which
P(B|A) is the probability of event B happening, given that A happened.
[tex]P(A \cap B)[/tex] is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Sent by ABC Speedy Delivery Service.
Event B: Arrived on time.
The probability that any given parcel will be sent by the ABC Speedy Delivery Service is 0.71.
This means that [tex]P(A) = 0.71[/tex]
The probability that the parcel will arrive on time given the ABC Speedy Delivery Company was used is 0.93.
This means that [tex]P(B|A) = 0.93[/tex]
Find the probability that it will be sent with the ABC Speedy Delivery Company and arrive on time.
This is [tex]P(A \cap B)[/tex]. So
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
[tex]P(A \cap B) = P(B|A)*P(A) = 0.93*0.71 = 0.6603[/tex]
0.6603 = 66.03% probability that it will be sent with the ABC Speedy Delivery Company and arrive on time.
[tex]3x-5+7x+11[/tex]
Answer:
10x + 6
Step-by-step explanation:
3x - 5 + 7x + 11
10x - 5 + 11
10x + 6
1. Solve and show your work for each question.
(a) What is 0.36 expressed as a fraction in simplest form? (Line over both numbers)
(b) what is 0.36 expressed as a fraction in simplest form? ( line over the 6)
(c) what is 0.36 expressed as a fraction in simplest form? (Non-repeating)
PLS HURRY 20 POINTS
Answer:
A) 0.36 with a line over both 36 means as a decimal the 36 repeats, so it would look like 0.363636
as a fraction it would be 36/99, divide both numbers by 9 to get 4/11
B) 0.36 with the line over the 6 means just the 6 repeats so it would look like 0.3666
as a fraction that would be 33/90 , divide both by 3 to get 11/30
C) 0.36 would be 36/100, divide both numbers by 4 to get 9/25
Stainep-by-step explain
What is the distance between (2, 5) and (2, -7)?
Question 1 options:
2
5
12
14
Answer:
12
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
Self-explanatory
Answer:
B. 0.96x25
Step-by-step explanation:
Set up an is/of=%/100 equation. Then 96/100=x/25. This is the same as 0.96 which is 96/100 multiplied by 25.
A study examined the link between sodium intake and blood pressure in children and adolescents
between the ages of 8 and 18. The mean systolic blood pressure (SBP) was 112.8 mm Hg among
the 636 study participants who were overweight or obese and consumed high levels of sodium,
resulting in a 95% confidence interval for this group of 110.7 to 114.9 mm Hg.
The numerical value of the margin of error for this confidence interval is____ mm Hg.
Answer:
2.1 mmHg
Step-by-step explanation:
The confidence is given by:
Mean ± margin of error
Confidence interval = (110.7 ; 114.9)
Mean = 112.8
Lower boundary = 110.7
Taking the lower boundary :
Lower boundary = mean - margin of error
110.7 = 112.8 - margin of error
Margin of Error = 112.8 - 110.7
Margin of Error = 2.1
PLEASE HELP!!!! WILL GIVE BRAINLIEST!! 30 POINTS!!
Write a matrix that correctly displays the total number of students participating in these activities for the two high schools?
five different names were put into a hat. A name is chosen 111 times and the name Karen is chosen 29 times. What is the experimental probability of the name Karen being chosen? What is the theoretical probability of the name being chosen? Use pencil and paper. Explain how each probability would change if the number of names in the hat were different.
Answer:
Step-by-step explanation:
As the name Karen is chosen 29 out of 111 times,
the experimental probability of the name Karen being chosen = 29/111
As five different names were put into a hat,
the theoretical probability of one name like Karen being chosen = 1/5
If the number of names in the hat were different, the experimental probability will still depend on the outcomes. If it is 29 out of 111 times, then the probability stays the same.
But the theoretical probability will be 1 out of the number of names. So it will change.
Answer:
Step-by-step explanation:
P(experimental) = outcome = 29/111
P(theoretical) = P(equal chance) = 1/5
P(expt) no change w/ no. of names
P(theo) changes w/ no. of names
by how much is Rs. 2690 less than Rs. 3780?
Answer:
1090
Step-by-step explanation:
Hope it helps u
mark brainlist pls
Find the 14th term of the arithmetic sequence x-4, 7x-9, 13x-14, ...
Answer:
14x-9
Step-by-step explanation:
Does (3,8) make the Equation y=x-5 true?
Answer:
no
Step-by-step explanation:
Math. I don’t understand it. Pls anyone who is willing to help me with these hard times.
Answer:
idrk maybe try using a different app if you don't get answers
