Answer:
98
Step-by-step explanation:
Average is the sum of all data points divided the number of data points.
In this specific situation, the average test score, 91, is equal to the sum of Molly's four individual test scores divided by the number of test Molly had, 4.
(( 86 + 87 + 93 + x) / 4) = 91
86 + 87 + 93 + x = 91/4
86 + 87 + 93 + x = 364
x = 364 - 93 - 87 - 86 = 98
the average rate of change of the function f(x) on the interval -3≤x≤3 is -2.5. If (-3)=14 then which of the following is the value of f(3)?
The average rate of change of f(x) on -3 ≤ x ≤ 3 is given to be
(f (3) - f (-3)) / (3 - (-3)) = -2.5
If f (-3) = 14, then
(f (3) - 14) / (3 + 3) = -2.5
(f (3) - 14) / 6 = -2.5
f (3) - 14 = -15
f (3) = -1
Number 12 help please it’s a short answer
Answer:
Reactants: aluminum and copper chloride.
Products: copper and aluminum chloride.
Step-by-step explanation:
Let's consider the following equation.
aluminum + copper chloride ⇒ copper + aluminum chloride
Using chemical symbols, this would be:
2 Al + 3 CuCl₂ ⇒ 3 Cu + 2 AlCl₃
The substances to the left of the arrow are the reactants: aluminum and copper chloride.
The substances to the right of the arrow are the products: copper and aluminum chloride.
A number is multiplied by 2, and then the product is added to 9. The result is 49
Answer:
the answer would be twenty
Step-by-step explanation:
20x2=40 +9=49
49=49
Consider the following number line. What is the sign of B+A
A. Positive
B. Negative
C. Neither positive nor negative- the sum is zero.
PLEASE ANSWER NOW ITS DUE IN MINUTES THE TEST
Answer:
c
Step-by-step explanation:
im 95% sure
Belle's dad lends her $10. Then Belle borrows another $15 from him. Write and evaluate an expression that shows the change in the amount of money Belle's dad has.
The expression that shows the change in the amount of money Belle's dad has is (x - 25) and this can be determined by forming the linear equation in one variable.
Given :
Belle's dad lends her $10. Then Belle borrows another $15 from him.
The following steps can be used to determine the expression that shows the change in the amount of money Belle's dad has:
Step 1 - Let the total amount of money Belle's dad have be 'x'.
Step 2 - Then it is given that Belle's dad lends her $10. So the expression becomes:
= x - 10b
Step 3 - Now, it is also given that Belle borrows another $15 from her dad. So, the above expression becomes:
= x - 10 - 15
Step 4 - Simplify the above expression.
= x - 25
So, the expression that shows the change in the amount of money Belle's dad has is (x - 25).
For more information, refer to the link given below:
https://brainly.com/question/13101306
Define a variable, write an inequality, and solve: A number decreased by 7 is at least 15.
Answer:
x is greater than it equal to 22
Step-by-step explanation:
Have a nice day! xoxo Arael :)
Antonio completed the right column of the table to help him find the sum of 2/ and 1/5.
In which step did his first error occur?
Step ( )
Answer:
Antonio's first error occurred in First step where he added the denominators of both fractions instead of finding a common denominator.
Step-by-step explanation:
In order to add or subtract two fractions, a common denominator is found and then the denominators of both fractions are made equal to the common denominator.
The given fractions are:
[tex]\frac{2}{9}\ and\ \frac{1}{5}[/tex]
The common denominator is the number which is the multiple off denominators of both fractions involved.
Antonio made his first error in first step. Instead of finding a common multiple denominator, he add the denominator of both fractions which is wrong.
The correct method is:
[tex]\frac{2}{9} + \frac{1}{5}\\= \frac{2*5}{9*5} + \frac{1*9}{5*9}\\=\frac{10}{45}+\frac{9}{45}\\=\frac{19}{45}[/tex]
Hence,
Antonio's first error occurred in First step where he added the denominators of both fractions instead of finding a common denominator.
95
28pºo
Which expression is equivalent to
? Assume p*0.90
12067
2
015912
7015
3712
o
2012
075
7015912
3
Answer:
7p¹⁵/ 3q¹²
Step-by-step explanation:
From the question given above,
28p⁹q¯⁵ / 12p¯⁶q⁷
To know which of option is equivalent to the above expression, we shall simplify the expression as shown below:
28p⁹q¯⁵ / 12p¯⁶q⁷
28p⁹q¯⁵ ÷ 12p¯⁶q⁷
Recall:
Xᵐ ÷ Xⁿ = Xᵐ ¯ ⁿ
Therefore,
28p⁹q¯⁵ ÷ 12p¯⁶q⁷ = (28/12)p⁹ ¯ ¯⁶q¯⁵ ¯⁷
28p⁹q¯⁵ ÷ 12p¯⁶q⁷ = (7/3) p⁹⁺⁶q¯¹²
28p⁹q¯⁵ ÷ 12p¯⁶q⁷ = (7/3) p¹⁵q¯¹²
Recall:
X¯ⁿ = 1/Xⁿ
Therefore,
(7/3) p¹⁵q¯¹² = (7/3) p¹⁵ × 1/q¹²
(7/3) p¹⁵q¯¹² = 7p¹⁵/ 3q¹²
Hence,
28p⁹q¯⁵ / 12p¯⁶q⁷ = 7p¹⁵/ 3q¹²
Answer:
B
Step-by-step explanation:
Solve for A if is 3.14 and R = 3
Answer:
A = 28.26
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
Equation: A = πr²
Given: π = 3.14, r = 3
Step 2: Evaluate
Substitute: A = 3.14(3)²Exponents: A = 3.14(9)Multiply: A = 28.26Craig works at a restaurant for 21 hours in January. at this rate, how many hours will he work after 7.5 months?
Answer:
around 4725
Step-by-step explanation:
Answer:
157.5 hours
Step-by-step explanation:
If Craig continued to work 21 hours for 7.5 months he would work a total of 157.5 hours.
Why?
Because if you multiply 21 seven times you get a total of 147 hours, but we still have the .5 of the month so take 21 and divide it by 2 which gives us 10.5 hours.
When you have both you outcomes ready you add 147 and 10.5 hours
Which gives us 147+10.5=157.5 hours.
Good luck :)
How to post a answer so people can see it
Need answers to three questions in picture will give brainly
Answer:
3. the answer is A3
Step-by-step explanation:
you do 3x-1 and you get 3
Answer:
3. B
4. J
5. C
Write an equation for the n th term of the arithmetic sequence -7 -2 3 8
My Practice Time 4
Shiva went to Rajaram Provision Store and bought 2 kg of tuar dal at 383.50 per kg,
3-kg of moong dal at 371.70 per kg, 5 kg of rice at 52.00 per kg, 100 g of mustard at
*85 per kg and 250 g of jeera at 200 per kg. Prepare a bill and find the total cost. Find
out how much he should get back, if he gives a 1000 note to the shopkeeper.
2
17
Answer:
which class wuestion??
which equation is equivalent to the formula below?
Y = A ( X - H) ^2 + K
Answer:
B. a = y - k/(x-h)²
Step-by-step explanation:
Given the expression y = a (x-h)² + k
First make a the subject of the formula
Subtract k from both sides
y = a (x-h)² + k
y- k = a (x-h)² + k - k
y - k = a (x-h)²
Divide through by (x-h)²
y - k/(x-h)² = a
a = y - k/(x-h)²
Hence option B is correct
Answer:
a=y-k/(x-h)^2
find the it out 12 divided by 3/5
Answer:
20
Step-by-step explanation:
hope this helps. i am in algebra two so you can trust my answer. happy holidays stay safe
Answer:
20 Hope this helps!
Real World Systems
1. Members of a drama club spend $795 on T-shirts and sweatshirts for a play. They purchase 20 more T-shirts than
sweatshirts. They buy T-shirts for $12 each and sweatshirts for $25 each.
How many T-shirts do the drama club members buy?
A
15 T-shirts
B.
21 T-shirts
с
22 T-shirts
D.
35 T-shirts
Choose the right answer.
A box and whiskers chart dlvides a data set Into
equal parts called quartiles.
2
4
3
A box and whiskers chart divides the data set into 4 equal parts called quartiles. (second option)
What is a box and whiskers chart?A box and whiskers chart is used to study the distribution and level of a set of scores. The values are distributed into 4 groups. Each group has a value of 25%
The whiskers represent the minimum and the maximum values. On the box, the first line to the left represents the lower quartile. 25% of the score represents the lower quartile. The next line on the box represents the median. 50% of the score represents the median. The third line on the box represents the upper quartile. 75% of the scores represents the upper quartile.
To learn more about box plots,. please check: https://brainly.com/question/27215146
#SPJ1
PLEASE HELP!! AND SHOW WORK OR EXPLAIN PLEASE!! I WILL GIVE BRAINLIEST!!
Answer:
H) Slope -1/4 and y-intercept -1.5
Step-by-step explanation:
The slope of the line is determined by the formula :
[tex]m=\frac{y_2-y_1}{x_2-x_1} \\\\[/tex]
We can use any two points on the line lets use the ones that are shown, (-6 , 0) and (2 , -2).
[tex]m=\frac{y_2-y_1}{x_2-x_1} \\\\m=\frac{-2-0}{2-(-6)} \\\\m=\frac{-2}{8}\\\\m=-\frac{1}{4} \\[/tex]
and the y-intercept is shown in the graph where the line crosses the y-axis
In this case the line crosses the y-axis between -1 and -2 which is -1.5
so the value of slope is -1/4 and the value of y-intercept is -1.5 .So third option is our answer.
Which of the following equations are
true? Select all that apply.
A 7 +(-7) – 14
B +
-4 + 9 - 5
C 3- (-10) = -7
D-2-6-8
Answer:
A. B. D. NOT C
Step-by-step explanation:
i don't know if you wrote anything wrong but this is correct if you are correct
¿Cuántas placas diferentes de autos se pueden formar con 3 letras, seguidas de 4 números del 0 al 9? Considere que el alfabeto letras. cuenta con 27
Answer: Se pueden hacer 196,830,000 placas distintas.
Step-by-step explanation:
Cada placa va a tener 3 letras y 4 números.
Lo primero que tenemos que hacer es contar el numero de opciones que tenemos para cada selección, donde las selecciones van a ser.
Primera letra, segunda letra, tercera letra, primer numero, etcétera.
Entonces.
Para la primera letra tenemos 27 opciones.
Para la segunda letra también tenemos 27 opciones.
Para la tercera letra también tenemos 27 opciones.
Para el primer numero tenemos 10 opciones (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
para el segundo numero también hay 10 opciones.
Para el tercer numero también hay 10 opciones.
Para el cuarto numero también hay 10 opciones.
El numero total de posibles combinaciones va a ser igual al producto de todos los números de opciones, en este caso es:
C = 27*27*27*10*10*10*10 = 27^3*10^4 = 196,830,000
Se pueden hacer 196,830,000 placas distintas.
What is the solution to 2x-8 <12
Step-by-step explanation:
2x-8<12
+8<+8
2x<20
[tex] \frac{2x}{2} \frac{20}{2} [/tex]
x<10
A recent Gallop poll showed that 672 of 1019 adults nationwide think that marijuana should be legalized. a) Find the margin of error that corresponds to a 95% confidence interval.
Answer:
the margin of error is 0.029
Step-by-step explanation:
The computation of the margin of error is as follows;
Point estimate = sample proportion
[tex]= \hat p[/tex] = x ÷ n = 672 ÷ 1019 = 0.659
Now
= 1 - [tex]\hat p[/tex]
= 1 - 0.659
= 0.341
[tex]Z\alpha/2[/tex] = Z_0.025 = 1.96
Now
a) Margin of error = E is
[tex]= Z\alpha / 2 \times \frac{((\hat p \times (1 - \hat p ))}{(\sqrt / n)} \\\\= 1.96 (\sqrt \frac{ (0.659 \times 0.341)}{(1019)} \\\\= 0.029[/tex]
Hence, the margin of error is 0.029
Ravi purchased 3 DVDs for $19.99 each. Find the total cost for the DVDs including 5% GST and 6% PST.
Answer:
$66.57
Step-by-step explanation:
Cost of one DVD = $19.99
Cost of 3 DVDs = $19.99*3 =$59.97
Rate of GST = 5%
Amount of GST
= 5%* $59.97
= 0.05*59.97
= $2.9985
Rate of PST = 6%
Amount of PST
= 6%* $59.97
= 0.06*59.97
= $3.5982
Total cost of DVDs
= $59.97 + $2.9985 + $3.5982
= $66.5667
= $66.57
What should be done to both sides of the equation in order to solve -5m=-40
Divide by -5
Divide by -40
Multiply by -5
Multiply by -40
HELPPPPPPPPPPPPPPPPPPPPPPPPP
Answer: 53.33
Step-by-step explanation:
60 + 9x =540
540-60 = 480
480 = 9x
53.33 = x
calculate the slope of the line
HELPPPP IM GIVING BRANLEISTTTT PLESE HURRY ITS DUE IN 20 minssss!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B. -3,4
Step-by-step explanation:
1. Choice D
2. Choice C
3. Choice B
4. Choice B
5. Choice C
A recipe for chocolate chip cookies calls for 4 cups of flour and 3 tablespoons of brown sugar. How many tablespoons of brown sugar would be needed if the amount of flour were increased to 12 cups? PLZ i'll pay well
Answer:
it will be increased to 6 tablespoons more so it will be 9 tablespoons in total
Step-by-step explanation:
12 divided by 4 is 3
so 3 x 3 is 9
9 tbsp i total of brown sugar
Please if you know plz tell me ;(
the images go in order to the graph