Which property justifies the statement below?
a(2b+c)=a(c+2b)
a. commutative property of addition
b. commutative property of multiplication
c. associative property of addition
d. distributive property
Answer:
The answer is B
Step-by-step explanation:
It is B because in the parenthesis all the numbers do is switch around.
mary answered 93 problems correctly out of 100 how many did she miss
What is the volume of a hemisphere with a radius of 39.4 ft, rounded to the nearest
tenth of a cubic foot?
Answer:
volume of the hemisphere=2/3×22/7×39.4³
Step-by-step explanation:
=128151.01ft³
If = x+12
what is the value of *?
X
21
Answer:
9
Step-by-step explanation:
HELP ME PLZ ASAPPPPPP
Answer:
[tex](x,y) =(-4,-3)[/tex] --- Vertex
[tex]x = -4[/tex] --- Axis of symmetry
Step-by-step explanation:
Given
[tex]y = -6(x + 4)^2 - 3[/tex]
Solving (a): The vertex
For an equation written in
[tex]y = a(x - h)^2 + k[/tex]
The vertex is:
[tex](x,y) = (h,k)[/tex]
By comparison:
[tex]y = a(x - h)^2 + k[/tex] and [tex]y = -6(x + 4)^2 - 3[/tex]
[tex]-h =4[/tex] [tex]k = -3[/tex]
[tex]h =-4[/tex] [tex]k = -3[/tex]
So, the vertex is:
[tex](x,y) =(-4,-3)[/tex]
Solving (b): The axis of symmetry
For an equation written in
[tex]y = a(x - h)^2 + k[/tex]
The axis of symmetry is:
x = h
In (a):
[tex]h =-4[/tex]
So:
[tex]x = -4[/tex]
Which of the following choices matches the system
25% of 275 is 68.85
Answer:
Step-by-step explanation:
no its not
its 68.75
Does anybody know if it’s possible to find the answers online for Aleks math?
A large western state consists of 4390 million acres of land. Approximately 16% of this land is federally owned. Find the number of acres that are not federally owned.
Answer:
1408.5 acres
Step-by-step explanation:
Write the equation of the line that passes through the points (2,5) and (3, 10)
Answer:
y = 5x-5
Step-by-step explanation:
First find the slope
m = ( y2-y1)/(x2-x1)
= ( 10-5)/(3-2)
= 5/1
=5
Using slope intercept form
y = mx+b
y = 5x+b
Substituting a point into the equation
5 = 5*2+b
5 = 10+b
Solving for b
5-10 = b
-5 =b
y = 5x-5
Find the volume of the figure below. Round to the nearest tenth it needed. Please help
Answer:
1,060.8 mm³
Step-by-step explanation:
Volume of the triangular prism = ½*bhl
Where,
b = 12 mm
h = √(12² - 6²) ≈ 10.4 mm (pythagorean theorem)
l = 17 mm
Plug in the values
Volume = ½*12*10.4*17
Volume = 1,060.8 mm³
400 UCF students were randomly selected and asked if they preferred washing their hands with soap and water or using hand sanitizer. 102 said they prefer to use hand sanitizer. 400 USF students were randomly selected and asked the same question. 112 said they prefer to use hand sanitizer. You want to examine the difference in the proportion of all UCF (1) and USF (2) students who prefer to use hand sanitizer.
1. Which test should be used to determine if a difference exists between the proportion of all UCF and USF students who prefer to use hand sanitizer?
a. z test for means t test for means.
b. z test for proportions paired.
c. z test for means.
d. paired t test for means.
2. Which alternative hypothesis should be used to determine if a difference exists between the proportion of all UCF and USF students who prefer to use hand sanitizer?
A. HA : mu1 - mu2 < 0.
B. HA : mu1 - mu2 is not equal to 0.
C. HA : mu1 - mu2 > 0.
D. HA : p1 - p2 < 0.
E. HA : p1 -p2 > 0.
Answer:
1. a. z test for means and t test for means.
2. C. HA : mu1 - mu2 > 0
Step-by-step explanation:
Hypothesis testing is used in a situation where there are more than 1 alternative available. The t test is conducted in the mean which determines the t value and then this value is compared with p value to identify the situation whether to accept or reject the null hypothesis. The alternative hypothesis in this situation is is represented by mu.
HELPPP!!!!!! WILL BE MARKED BRAINLIEST AND GET 60 POINTSS!!!!!
FIND THE INTERVAL OF THE CONVERGENCE
Answer:
Interval of convergence is 0 </= x < 1
Step-by-step explanation:
Help I cannot figure this question out.
Answer:
B. x = -1 ± i
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityAlgebra I
Standard Form: ax² + bx + c = 0FactoringQuadratic Formula: [tex]\displaystyle x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}[/tex]Algebra II
Imaginary Numbers: √-1 = iStep-by-step explanation:
Step 1: Define
x² + 2x = -2
Step 2: Identify Variables
Rewrite Quadratic in Standard Form [Addition Property of Equality]: x² + 2x + 2 = 0Break up Quadratic: a = 1, b = 2, c = 2Step 3: Solve for x
Substitute in variables [Quadratic Formula]: [tex]\displaystyle x=\frac{-2 \pm \sqrt{2^2-4(1)(2)}}{2(1)}[/tex][√Radical] Evaluate exponents: [tex]\displaystyle x=\frac{-2 \pm \sqrt{4-4(1)(2)}}{2(1)}[/tex]Multiply: [tex]\displaystyle x=\frac{-2 \pm \sqrt{4-8}}{2}[/tex][√Radical] Subtract: [tex]\displaystyle x=\frac{-2 \pm \sqrt{-4}}{2}[/tex][√Radical] Factor: [tex]\displaystyle x=\frac{-2 \pm \sqrt{-1}\sqrt{4}}{2}[/tex][√Radicals] Simplify: [tex]\displaystyle x=\frac{-2 \pm 2i}{2}[/tex]Factor: [tex]\displaystyle x=\frac{2(-1 \pm i)}{2}[/tex]Divide: [tex]\displaystyle x = -1 \pm i[/tex]What transformation is shown below? (Look carefully at the vertices.)
rotation
translation
reflection
can't be determined
multiple choice pls answer!
Answer:
maybe answer is D......
Someone please help me f(x)=
Answer:
4x-3
Step-by-step explanation:
A city council wants to know if residents would like a dog park . They sent a survey to every household in the city . The results of those who responded are shown in the table below . What is the experimental probability that a household has 2 or more dogs ?
Answer:
probability= event / sample space
= 129/860
=3/20
=0.15(15%)
the total cost of 2 kg of Apples in 6 of oranges is rupees 570 if the cost of 3 kg of apples is the same as the cost of 5 kg of oranges find the rate of cost of apples and oranges
Answer:
Cost of 1 kg apple = a = RS 102 (Approx.)
Cost of 1 kg orange = b = RS 61 (Approx.)
Step-by-step explanation:
Assume;
Cost of 1 kg apple = a
Cost of 1 kg orange = b
So,
2a + 6b = 570 ....... Eq1
and
3a = 5b..........Eq2
From eq 2
3a = 5b
a = 5b / 3
So,
2a + 6b = 570
2(5b/3) + 6b = 570
b = 61.07
Cost of 1 kg orange = b = RS 61 (Approx.)
a = 5b / 3
a = 5(61) / 3
Cost of 1 kg apple = a = RS 102 (Approx.)
If 100 oil makes 45 petroleum gas, how much oil will make 20 petroleum gas?
Answer:
44 oil make 20 petroleum gas
Step-by-step explanation:
100 ÷ 45 = 2.2
2.2 oil makes one petroleum gas
20 x 2.2 = 44
What is the standard form equivalent of this quadratic expression in factored form (x+3)(x-5)
Find the 12" term of the arithmetic sequence whose common difference is d=8 and whose first term is a = -2.
Can someone please help me?
Answer:
86.
Step-by-step explanation:
nth term = a1 + d(n - 1) so here we have:
12the term = -2 + 8( 12 - 1)
= -2 + 88
= 86.
please help me ,38 points for 2-7 this is 7th grade 1 step equation word problems
2) Alyssa is baking a cake. The recipe calls for 9 cups of flour. She already put in 4 cups. How many more cups does she need to add ?
3) After eating at the restaurant, Sara, Tom, and Keith decided to divide the bill evenly. If each person paid 45 dollars, what was the total of the bill ?
4) Tim had 15 peaches left at his roadside fruit stand. He went to the orchard and picked more peaches to stock up the stand. There are now 68 peaches at the stand, how many did he pick?
5) Keith received 52 dollars for his birthday. He went to a sporting goods store and bought a baseball glove, baseball, and bat. He had 47 dollars left over, how much did he spent on the baseball gear?
6) Last week Tim had 38 dollars. He washed cars over the weekend and now has 91 dollars. How much money did he make washing cars ?
7) There were 6 roses in the vase. Jessica cut some more roses from her flower garden. There are now 16 roses in the vase. How many roses did she cut?
Answer:
the answer would be the equilibrium of 28.59295
(10 POINTS) answer ASAP if you can
Answer: As soon as possible
Step-by-step Explanation: You just say ASAP for As soon as possible
The graph of k(x) =x^2 is translated 15 units to the right on a coordinate grid to create the graph of the function p. Which function represents the between the graphs of k and p?
A. P(x) = k(x+15)
B. P(x) = k(x-15)
C. P(x) = k(x) + 15
D. P(x) = k(x) - 15
Answer:
B. P(x) = k(x-15)
Step-by-step explanation:
3. Tim had 253 dollars to spend on 7 books. After
buying them he had 15 dollars. How much did each book cost?
Answer:
each book costs $34
Step-by-step explanation:
assuming that all the books cost the same,
253-15=238
238/7=34
Answer: Each book cost $34.
Step-by-step explanation:
First subtract 253-15.
253-15=238.
Then divide 238/7.
238/7=34
Hope this helps :)
please help me asap!!!!
Answer:
there's no picture info here...
Step-by-step explanation:
find the ratio of 20 : 50
Answer:
20:50
20/50=40%
help is needed DESPERATLY
Answer:
A) 3
Step-by-step explanation:
We have
[tex]S = x<4 = (-\infty, 4)[/tex]
Once
[tex]6, 5, 4.5 \notin S[/tex]
but
[tex]3\in S[/tex]
The answer is 3.
Answer:
A) 3
Step-by-step explanation:
<----|----|----|----|----|----|----|----|----|----|----
-3 -2 -1 0 1 2 3 4
Hope this helps
What is the y-intercept of the graph? 15 points
Answer:
5
Step-by-step explanation:
bro its literally on the graph lol just check where the line touches the y axis
Answer:
5
Step-by-step explanation:
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