Answer:
8:40 a.m.
Step-by-step explanation:
Let's start by finding the time John should arrive at school.
9:00 a.m. - 5 minutes = 8:60 a.m. - 5 minutes = 8:55 a.m.
Note that there are 60 minutes in an hour
Now, we find the time he should leave home...
8:55 a.m. - 15 min = 8:40 a.m.
Therefore John should leave at 8:40 a.m.
Another way to solve this problem:
John needs to leave home in "x" minutes before 9:00 a.m. to arrive when the bell rings (9:00 a.m.). To find "x", we need to add 15 and 5 to get:
15 min + 5 min = 20 min.
Therefore he must arrive 20 minutes before 9:00 a.m.
9:00 a.m. - 20 min = 8:40 a.m.
Therefore John should leave at 8:40 a.m.
Determine the number and type of solutions of the quadratic
equation.
- 4x2 - 4x – 1=0
O one imaginary solution
O two real solutions
O one real solution
O two imaginary solutions
Step-by-step explanation:
the degree of a polynomial determines 1:1 the number of solutions.
a quadratic equation (degree 2) has 2 solutions.
the general solution is
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
a = -4
b = -4
c = -1
so,
x = (4 ± sqrt((-4)² - 4×-4×-1))/(2×-4)
when we look at the square root
16 - 16
we see that it is 0.
the square root of 0 is 0, and there is no difference between -0 and +0.
so, we get only one (real) solution : 4/-8 = -1/2
but : formally, there are still 2 solutions (as this is a quadratic equation). they are just identical.
so, I am not sure what your teacher wants to see in this case as answer.
my answer would be 2 real identical solutions.
A pair of parallel lines is cut by another pair of parallel lines as shown in the figure. Which angles are congruent to angle?
R
N
P
E
H Н
F
O angles P, Q, and R
Bangles M. Land
OC angles A and B
OD angles and
Engles M N and P
Answer:c
Step-by-step explanation:
The sides of a triangle are as follows:
2x – 4
x + 5
3x + 3
Find x if the perimeter of the triangle is 100 in.
Set up an equation and solve.
show work
Answer:
x=16
Step-by-step explanation:
(2x-4)+(x+5)+(3x+3)=100
6x+4=100
6x=96
x=16
The graph shows the yearly balance, in dollars, in an investment account.
5,000
4,000
3,000
amount in dollars
.
2.000
1,000
0
2
4
12
14
6 8 10
number of years
a. What is the initial balance in the account?
Take 2 points
(0,5000)(2,4000)Slope:-
[tex]\\ \rm\Rrightarrow m=\dfrac{4000-5000}{2}=-500[/tex]
Equation in point slope form
[tex]\\ \rm\Rrightarrow y-5000=-500(x)[/tex]
[tex]\\ \rm\Rrightarrow y=-500x+5000[/tex]
Initial amount=y intercept=5000Which expression is equivalent to (-4y-x)-(3y-9x)?
Answer: Is there any answers to choose from
Answer:
-7y - 8x
the person who answered the question before me is buggin
Please help with my algebra
Determine whether the situation involves a permutation or combination. Then, find the number of
possibilities.
In how many ways could you choose 3 side dishes from a menu that offers 5 vegetable side dishes
and 3 starches if you want at least one vegetable and one starch?
The situation involves combination
There are 45 possibilities of choosing the 3 side dishes from the menu
How to determine the number of ways?The given parameters are
Dishes to choose = 3Vegetable = 5Starch = 3The keyword choose means that the situation involves combination.
Given that you want at least one vegetable and one starch, the selections are:
(Vegetable, Starch) = (1,2) and (2,1)
So, the number (n) of ways the dishes can be selected is:
n = 5C1 * 3C2 + 5C2 * 3C1
Apply the combination formula on each expression
n = 5 * 3 + 10 * 3
Evaluate the sum
n = 45
Hence, there are 45 possibilities of choosing the 3 side dishes from the menu
Read more about combination at:
https://brainly.com/question/11732255
Solve each system by substitution. Show all work.
-8x+2y= -4
-7x+y= -8
Answer:
(2, 6 )
Step-by-step explanation:
- 8x + 2y = - 4 → (1)
- 7x + y = - 8 ( add 7x to both sides )
y = 7x - 8 → (2)
substitute y = 7x - 8 into (1)
- 8x + 2(7x - 8) = - 4 ← distribute parenthesis and simplify left side
- 8x + 14x - 16 = - 4
6x - 16 = - 4 ( add 16 to both sides )
6x = 12 ( divide both sides by 6 )
x = 2
substitute x ;= 2 into (2)
y = 7(2) - 8 = 14 - 8 = 6
solution is (2, 6 )
mark opens a bank account with $20. He plans to put in $5 each week. c. write an equation to represent the total amount of money mark has in his account over time
Answer:
y=$35
Step-by-step explanation:
y= total number in your account
x= # of weeks
y=5x + 20
y=10x + 5
x=3 weeks
What is the sample? all state households 1565 households surveyed 1127 households that owned televisions.
The percentage of the household survey that owned televisions is 72%. And the sample is defined below.
What is the percentage?The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.
What is a sample?Random sampling is the method of selecting the subset from the set to make a statical inference.
All states households 1565 households surveyed 1127 households that owned televisions. Then the percentage will be
[tex]\rm Percentage = \dfrac{1127}{1565}*100\\\\Percentage = 0.72*100\\\\Percentage = 72 \%[/tex]
More about the percentage link is given below.
https://brainly.com/question/8011401
Answer:
1565 households surveyed
Step-by-step explanation:
I did this on edge :)
A fifth grade class is rising money to buy a microscope for their classroom. They grew tomato plants to sell for 2.75 each.
Part A On one day, they raised 79.75 from selling tomato plants. How many plants did they sell?
Part B The next day, they sold the last 4 plants they had grown. How much money in dollars did they raise in all?
Answer:
Part A -- 29 plants
Part B -- 90.75$
Step-by-step explanation:
79.75 / 2.75 = 29
4 x 2.75 = 11
79.75 + 11 = 90.75
Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!
answer please !!!!!!
What is the median of the following dataset? (1,5,6,3,4,5,6,8,9)
Answer:
The median would be the second 5
Therefore our answer would be 5
Step-by-step explanation:
The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. In simple terms, it may be thought of as the "middle" value of a data set. For example, in the data set {1, 3, 3, 6, 7, 8, 9}, the median is 6, the fourth number in the sample. The median is a commonly used measure of the properties of a data set in statistics and probability theory
Find Area of each shaded sector. Round to the hundredths place.
Check the picture below.
so the area that is not shaded has a total of 90° + 26° = 116°.
a circle has a total of 360°, so the area that is shaded must be 360° - 116° = 244°, and it has a radius of 25.
[tex]\textit{area of a sector of a circle}\\\\ A=\cfrac{\pi \theta r^2}{360}~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=25\\ \theta =244 \end{cases}\implies \begin{array}{llll} A=\cfrac{\pi (244)(25)^2}{360}\implies A=\cfrac{7625\pi }{18} \\\\\\ A\approx 1330.81 \end{array}[/tex]
Answer:
1330.81
Step-by-step explanation:
I'm not sure if it wanted the individual sectors or the whole shaded region in general, so I just did the latter since it seemed easier. Hope it helps!
Quadratic Equations
How to find x and y-intercepts from vertex form (not standard).
The line shown represents the amount of money left on a gift card, y, after Mina buys lattes. After buying 2 lattes, she has $2 left. What is an equation of the line in point-slope form?
Answer:
[tex]y-2 = -3(x-2)[/tex]
Step-by-step explanation:
Find the diagram to the question attached.
The standard equation of a line in point-slope form is expressed as:
[tex]y-y_0 = m(x-x_0)[/tex] where:
m is the slope of the line
[tex](x_0, y_0)[/tex] is coordinate point on the line
First is to get the slope of the line.
[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]
If after buying 2 lattes, she has $2 left, hence one of the coordinate of the line is (2, 2). We can get the other coordinates from the graph. From the graph, it can be seen that when x = 0, y = 8. Hence the other coordinates is (0, 8)
[tex]m = \frac{8-2}{0-2}\\m = \frac{6}{-2}\\m = -3[/tex]
Hence the slope is -3
Substitute m = -3 and the point (2, 2) into the formula to get the required equation (note that any of the points can be used)
[tex]y-y_0 = m(x-x_0)\\y-2 = -3(x-2)[/tex]
Hence the equation of the line in point-slope form is [tex]y-2 = -3(x-2)[/tex]
The L.C.M of 7 and 21 is what? first person Brainliest answer
Answer:
[tex]\huge\colorbox{navy}{Answer}[/tex]
[tex]lcm\: of \:7 \:and \:21 = 21 \: \: \: [/tex]
Answer:
21 is the l.c.m of 7 and 21
explanation:
[tex]\sf \bold \mathrm{The\:LCM\:of\:}a,\:b\mathrm{\:is\:the\:smallest\:positive\:number\:that\:is\:divisible\:by\:both\:}a\mathrm{\:and\:}b[/tex]
7 : 7
21 : 3 * 7
.
multiply, 7 * 3 = 21 - which is divisible by both 21 and 7
(35n3 - 30n2 + 25n) ÷ (-5n) -7n 2 - 6n - 5 -7n 2 + 6n - 5 -7n 2 - 6n + 5
Answer:
- 28n^2 - 10
Step-by-step explanation:
The emergency brake cable in a truck parked on a steep hill breaks and the truck starts rolling down the hill. The distance in feet, d, that the truck rolls is represented by the function d=f(t)=0.5t2. Using this function, find out how far the truck will roll after 9 seconds.
Answer:
The truck will roll 40.5 feet from top of the hill after 9 seconds.
Step-by-step explanation:
Let be [tex]f(t)[/tex] the distance rolled by the truck in time, measured in feet, whose expression is:
[tex]f(t) = 0.5\cdot t^{2}[/tex]
Where [tex]t[/tex] is the time, measured in seconds.
By evaluating this function at [tex]t = 9\,s[/tex], we find the distance rolled by the truck:
[tex]f(9\,s) = 0.5\cdot (9\,s)^{2}[/tex]
[tex]f(9\,s) = 40.5\,ft[/tex]
The truck will roll 40.5 feet from top of the hill after 9 seconds.
If Nadia is solving x^2 + 8x =24 by completing the square, what number should she add to
both sides?
Answer:
Subtract 24 from both sides.
Step-by-step explanation:
x2+8x=24
Step 1: Subtract 24 from both sides.
x2+8x−24=24−24
x2+8x−24=0
For this equation: a=1, b=8, c=-24
1x2+8x+−24=0
Step 2: Use quadratic formula with a=1, b=8, c=-24.
x=
−b±√b2−4ac
2a
x=
−(8)±√(8)2−4(1)(−24)
2(1)
x=
−8±√160
2
x=−4+2√10 or x=−4−2√10
Answer:
x=−4+2√10 or x=−4−2√10
Answer:
+ 16
Step-by-step explanation:
x² + 8x = 24
to complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(4)x + 16 = 24 + 16
Help me with this question!!
How do -11.5 and -9.5 compare? Choose the correct symbol
Answer:
-11.5 < -9.5
Step-by-step explanation:
If it's asking foto compare greater or less than, -9.5 is greater than -11.5
Hey there!
Here we are asked to compare the following decimals:
-11.5 and -9.5
how do we compare numbers?
Well, there are 3 symbols that we use:
< (less than)
> (greater than)
= (equal to)
is 11.5 equal to -9.5? nope!
Is -11.5 greater than -9.5?
No, because the decimals are negative.
Is -11.5 less than -9.5?
Yes.
Hence, the correct symbol is
[tex]\boxed{\boxed{\bold{-11.5 < -9.5}}}[/tex]
Hope everything is clear.
Let me know if you have any other questions!
#LearningDoesn'tEnd
:-)
sole for r −13= r/9 +8
Answer:
-189
Step-by-step explanation:
Isolate the r/9 (so subtract the 8 and add it to the other side). Then multiply the 9 out and you should get -189
Work:
-13=r/9 +8
-21=r/9
-189=r
Answer:
-189
Step-by-step explanation:
Khan academy
An isosceles triangle has a perimeter of 45 cm. If the two equal sides are each twice as long as the smallest side, what is the length of the smallest side?
A: 3
B: 7
C: 9
D: 15
E: 18
This one is about rate of change and has 2 questions that need two answers.
At 6:00 am, there was 1 inch of snow on the ground. By 11 am, there were 4 inches of snow on the ground. What is the average rate of change?
If the snow continues to fall at the same rate, how much snow will be on the ground by 1:00 pm.
Answer:
0.6 inches per hours
5.2 inches on the ground by 1:00 pm
Step-by-step explanation:
Let x = number of hours after midnight
Let y = height of snow (in inches)
Information presented as ordered pairs (x, y):
(6, 1)
(11, 4)
[tex]\mathsf{rate \ of \ change=\dfrac{change \ in \ y}{change \ in \ x}=\dfrac{4-1}{11-6}=\dfrac35 \ inches \ per \ hour}[/tex]
Written as a linear equation:
[tex]y-1=\dfrac35(x-6)[/tex]
[tex]\implies y=\dfrac35x-\dfrac{13}{5}[/tex]
1:00 pm = 13 hours after midnight
Therefore, when x = 13:
[tex]\implies y=\dfrac35(13)-\dfrac{13}{5}[/tex]
[tex]\implies y=5.2 \textsf{ inches}[/tex]
Which of the following is equal to 213 ÷ 3?
A.
(210 ÷ 3) + (3 ÷ 3)
B.
(210 + 3) ÷ (3 + 3)
C.
(210 ÷ 3) + (210 ÷ 3)
Answer:
210/3+3/3
Step-by-step explanation:
210/3=70+3=73/3=71
213/3=71
Help me, the question is in the picture
Thank you :)
Step-by-step explanation:
please mark me as brainlest
Answer:
800g gives a better value for money
Step-by-step explanation:
To find which box which gives you better value for money
Divide the gram by the cost of the cereal
1st calculations
--› 500g ÷ $2.5
=> 200
2nd calculations
--› 800g ÷ $3.95
=> 202.5316455696202
so the question that the value is bigger which is 800g= 202.5316455696202 gives you more money value
Three positive integers a, b, and x form an O'Hara triple (a,b,x) if and only if √a+√b=x. For example, (1,4,3) is an O'Hara triple because √1+√4=3. If (36,25,x) is an O'Hara triple, determine the value of x.
Work Shown:
[tex]\sqrt{a} + \sqrt{b} = x\\\\\sqrt{36} + \sqrt{25} = x\\\\6+5 = x\\\\11 = x\\\\x = 11[/tex]
The required value in (36,25,x) is an O'Hara triple, of x is 11.
Three positive integers a, b, and x form an O'Hara triple (a,b,x) if and only if √a+√b=x. For example, (1,4,3) is an O'Hara triple because √1+√4=3. If (36,25,x) is an O'Hara triple, To determine the value of x.
In mathematics, it deals with numbers of operations according to the statements.
From example,
(1,4,3) is an O'Hara triple because √1+√4=3, in the example sum of the square roots of the first two numbers is equal to the third number. so the value of x in (36,25,x) can be determined in the same manner.
Following the example,
√36+√25=x
6 + 5 = x
x = 11
Thus, the required value in (36,25,x) is an O'Hara triple, of x is 11.
Learn more about arithmetic here:
brainly.com/question/14753192
#SPJ2
James has a piece of construction paper with an area of 65 1/4. It is 9 2/3 inches long. What is the width of the piece of construction paper in inches
Answer:
James has a piece of construction paper with an area of 6514inches. It is 293inches long. What is the width of the piece of construction paper in inches?
Step-by-step explanation:
fist cdsddghjjhgfghjkl;'
2. What are the x-intercepts of the graph of the function defined by (x - 2)(2x + 1)?
A. (2,0) and (-1,0)
B. (2,0) and (-3,0)
C. (-2,0) and (1,0)
D. (-2,0) and (3,0)
Answer:
I think A. I got (2,0) and (-0.5,0). Weird.
Step-by-step explanation:
(x−119)÷7=6
Could anyone please help?
Answer:
x
=
161
Step-by-step explanation:
Multiply both sides of the equation by
7
.
7
⋅
(
x
−
119
)
÷
7
=
7
⋅
6
Simplify both sides of the equation.
Tap for more steps...
x
−
119
=
42
Move all terms not containing
x
to the right side of the equation.
Answer:
161
Step-by-step explanation:
Step 1:
( x - 119 ) ÷ 7 = 6 Equation
Step 2:
( x - 119 ) = 42 Multiply 7 on both sides
Step 3:
x = 42 + 119 Add 119 on both sides
Answer:
x = 161 Add
Hope This Helps :)