Answer:
x=4,-3
Step-by-step explanation:
Find the roots of 0 = x ^2 − x − 12 by solving for x .
Answer:
3 zeros
Step-by-step explanation:
Selma wants to know if seventh-grade students prefer to do their math homework in silence or with background music. She polled the 21 students in her music class. Seven students preferred to do their math homework in silence, and fourteen students preferred to do their math homework with background music. What type of sampling is demonstrated in the situation above?
A. random sampling
B. census
C. convenience sampling
D. Systematic Sampling
Answer:
D.
Step-by-step explanation:
She used systematic sampling by asking the class to vote by using a type voting system this will help by choosing the highest number as the vote she will go through with.
Pl help it’s for a grade
Answer:
1 m/s/s (1 meter per second per second)
Step-by-step explanation:
First, you need to divide 10 by 10, and that is 1. There is your answer!
Hope this helps!
(Please Brainliest if possible!!)
Solve each system of equations using any method.
y = 5x +7
y = 4x - 3
Answer:
x= -10
y= -43
Step-by-step explanation:
since both of your equations equals y just plug it into each other and than make the equation: 5x+7=4x-3
and than you can just start with the variables OR numbers and then simplify
5x+7=4x-3
5x+10=4x
10= -x
x= -10
so -10 for x
plug it in to one of your 2 equations to get y
5(-10)+7= y
-50+7=y
y= -43
The area of a circle is 25.12 square yards. If the dimensions of the circle are tripled, what will be the area of the new figure?
1. 226.08 yd 2
2. 8.37 yd 2
3. 75.36 yd 2
4. 150.72 yd 2
Answer:
75.36
Step-by-step explanation:
if its 25.12 jus multiply it by 3 since its tripled
In the summer reading program, a participant earns 50 stars for reading 10 books. The library tracks the number of stars (y, vertical
axis) and books (x, horizontal axis) on a graph. Which statements are correct?
A)
Point (5, 1) represents the unit rate.
B)
Point (1,5) represents the unit rate.
9
Point (0, 50) represents the unit rate.
D)
Point (100, 20) represents reading 20 books.
E)
Point (20, 100) represents reading 20 books
Answer:b and e
Step-by-step explanation:
Answer:
B and E
Step-by-step explanation:
This is because (1,5) represents the unit rate whilst, (20,100) represents reading 20 books.
MAKE SURE TO DRINK WATER AND A BREAK!!!
THINGS WILL GET BETTER <3
x-10= 30 Which value of x makes the equation true
Solve for R:
r +15/-7=-2
Answer:
1/7
one over seven
Step-by-step explanation:
The ratio of length to width on a rectangle is
11:3. The perimeter of the figure is 308. what is the
width of the rectangle
Answer:
[tex]Let~the~length~of~rectangle~be~'l'~and~its~width~be~'b'.\\According ~to ~question,\\l:b=11:3\\or, \frac{l}{b} =\frac{11}{3} \\or, l = \frac{11b}{3}\\Also,\\Perimeter~of~the~rectangle=308\\or, 2(l+b)=308\\or, l+b=154\\or, \frac{11 b}{3}+b =154 \\or, \frac{11b+3b}{3} =154\\or, 14b = 154(3)\\or, b=33 units\\So, ~the~width~of~rectangle~is~33units.[/tex]
Alternative method:
[tex]Let~the~length~and~width~of~the~rectangle~be~11x~and~3x.\\Given,\\Perimeter~of~the~rectangle = 308\\or, 2(11x+3x)=308\\or, 14x = 154\\or, x = 11\\Now,\\Width~of~the~rectangle,3x = 3(11)=33 units\\So,~the~width~of~the~rectangle~is~33units.[/tex]
does how many mean to add or subtract?
On the first day of soccer camp, all the players were divided into 2 teams. there were 9 players on each team. write an equation, that when solved, will tell the total number of players, p.
Answer:
2*9=18
Step-by-step explanation:
if there is 9 players on each of the 2 teams there would be 18 players in total
HELP ME PLS I NEED ANSWERS
Determine whether the ratios 1:1 and 6:6 are equivalent
Answer:
its is because if you divide 6:6 by 6 it equals 1:1
Step-by-step explanation:
plz brainliest i need it to rank up
Answer:
They are equivalent
Step-by-step explanation:
1:1 is the same as 6:6 because 6:6 is technically 1:1 when you divide both sides by 6.
In a bag there are 3 red marbles, 2 yellow marbles, and 1 blue marble. What is the percent chance of a yellow marble being selected on the first draw?
Group of answer choices
Answer:
33.333333% (the 3 goes on forever)
Measurement of angles
Answer:
Measuring an angle using a protractor in anticlockwise direction:
This is measurement in anticlockwise direction. Thus, we will use the inner scale to measure the angle.
The centre of the protractor is placed on the vertex B of the angle ABC. The base line of the protractor should coincide...
Read the markings where the arm BC overlaps the markings on the protractor.
Step-by-step explanation: Hope this helps :)
A dance team decided to sell fruit snacks to raise money for an upcoming competition. The dancers charged $3.00 for each fruit snack they sold. In 4 days, they sold 24 packs of fruit snacks. How much money could the team earn for seven days at that same rate?
Answer:
126 dollars
Step-by-step explanation:
(i'm gonna be doing my work here, dont mind me LOL)
okay, so they sold 24 packs in 4 days. divide 24 by 4 and you get 6. multiply 6 by 3 and you get 18.
now, multiply 18 by seven and you get 126.
bam!! the dance team could earn 126$ in 7 days ^__^ hope you get an A!
Answer:
$126
Step-by-step explanation:
Let x = packs sold in 7 days
Set up a proportion. days/days = packs/packs
4/7 = 24/x
4x = 24(7) = 42 packs sold in 7 days
At $3/pack, the amount earned in 7 days = 3(42) = $126
The first term of a sequence is 3 and the common ratio is 3. The sequence is:
a. 3, 6, 9, 12,...
b 3, 9, 27, 81,...
c 3, 9, 27, 36,...
d None of the choices are correct.
Answer:
B
Step-by-step explanation:
to ride a horse at the state fair costs 2$ per minute. Pablo buys a 16 minute ride. Next time her plans to ride 25% longer. How much will he pay?
Help please i will reward brainly
Answer:
40 dollars
Step-by-step explanation:
25% of 16 minutes is 4 mins. 16+4=20 mins.
so 20*2=40 dollars
A pair of jeans is marked down at 25% off the original price. The original price of
the jeans was $68.50. What is the price of the jeans before sales tax?
Answer:
$51.38
Step-by-step explanation:
1 - .25 = .75
you're paying 75% of the price
68.50 • .75 = 51.375 ≈ $51.38
pH = -log10 (C).
What is the value of c when the acidity of the liquid solution is 5 pH units?
OA. – 510
B. 5-10
OC. – 105
D. 10-5
4.65 rounded to the nearest whole
Answer:
5
Step-by-step explanation:
Answer:
its 5 because the 6 is above five so it rounds the 4 to a 5 if that makes sense prob not lol
Step-by-step explanation:
Find the exact value of tan e.
A. 15
3
B. 3/14
14
C. 35
5
D. 2/14
A 30- foot tree broke from its base and fell against a house. If the tree touches the house at a height of 21 feet, how far is the base of the tree from the house? Leave your answer in the simplest radical form.
I need help with this is there any chance someone can pls also include the work thanks!
Answer:
Triangle C
Step-by-step explanation:
Given
Triangle A, B, C and D
Required
Pick the odd triangle
From the attachment, we can see that:
A = Right angled triangle
B = Right angled triangle
C = Obtuse triangle
D = Right angled triangle
This is so because triangle C has one of its angles to be greater than 90 (i.e. 115) and other triangles (A, B and D) have an angle equal to 90, each.
Because C is obtuse and others are right-angled, then C is the odd triangle.
Please answer fast! I have only like 15 minutes. :(
Answer:
A is the correct answer. hope this helps you
Given m||n, find the value of x. (X+6)^ (x+10)^
Step-by-step explanation:
therefore x+6=0
x = -6 hope this helps and you understand it.
The container of orange juice held 5.3 cups of juice. If a serving of orange juice is of a cup of orange juice, to the nearest whole
serving, how many servings were in the container?
5 servings
6 servings
15 servings
19 servings
Emma ran 4 1/2 miles. For 3/4 of her run,she ran uphill. How many miles did she run uphill?
A. 3 3/8 miles
B. 3 1/2 miles
C. 3 3/4 miles
D. 4 1/4 miles
Answer:
A
Step-by-step explanation:
Defective Merchandise Suppose that 8% of a certain batch of calculators have a defective case, and that 11 % have defective batteries. Also, 3% have both a defective case and defective batteries. A calculator is selected from the batch at random. Find the probability that the calculator has a good case and good batteries.
Answer:
0.84 = 84% probability that the calculator has a good case and good batteries.
Step-by-step explanation:
We have these following percentages:
8% of a certain batch of calculators have a defective case.
11 % have defective batteries.
3% have both a defective case and defective batteries.
Using Venn Diagrams:
Event A: Defective Case
Event B: Defecitve Battery
So the probabilities are: [tex]P(A) = 0.08, P(B) = 0.11, P(A \cap B) = 0.03[/tex]
Probability of at least one problem:
[tex]P(A \cup B) = P(A) + P(B) - P(A \cap B) = 0.08 + 0.11 - 0.03 = 0.16[/tex]
Find the probability that the calculator has a good case and good batteries.
No problems, so
[tex]p = 1 - P(A \cup B) = 1 - 0.16 = 0.84[/tex]
0.84 = 84% probability that the calculator has a good case and good batteries.
The probability that the calculator has a good case and good batteries is 0.84 or 84%
Calculation of the probability:Since
8% of a certain batch of calculators have a defective case.
11 % have defective batteries.
3% have both a defective case and defective batteries.
So, the probability is
= 1- (0.08 + 0.11 - 0.03)
= 1 - 0.16
= 0.84
Therefore, The probability that the calculator has a good case and good batteries is 0.84 or 84%
learn more about probability here: https://brainly.com/question/16404410
What is the area of the trapezoid?
Answer:
A=78ft
Step-by-step explanation:
The area of a trapezoid is A=(a+b)/2 *h
a=long base
b=short base
h=height
For your trapezoid, it will look like this:
a=15ft
b=11ft
h=6ft
Let's add those into the equation:
A=(15+11)/2 *6
Okay, let's solve it! Using PEMDAS, we know parenthesis are first.
A=26/2 *6
Now we divide!
A=13*6
Multiply! And don't forget to add your unit.
A=78ft
Carlos spends 17 hour in a two-week period practicing the piano how many hours does he practice in 5 weeks
Answer:
51
Step-by-step explanation:
Answer:
42.5 hours
Step-by-step explanation:
17 hours/2 weeks
x hours/5 weeks
17*5=2x
42.5=x