Answer:
0 < x < 9
Step-by-step explanation:
Mary's age = x
Twice of Mary's age = 2x
Emily's age = (2x + 3) (we are told Emily is 3 years older than twice of Mary's age)
Given that the sum of their ages is > 30, we have the following expression:
[tex] (2x + 3) + x [/tex] > 30
Let's simply:
[tex] 2x + 3 + x [/tex] > 30
[tex] 3x + 3 [/tex] > 30
Subtract 3 from both sides
[tex] 3x + 3 - 3 [/tex] > [tex] 30 - 3 [/tex]
[tex] 3x [/tex] > [tex] 27 [/tex]
Divide both sides by 3
[tex] \frac{3x}{3} [/tex] > [tex] \frac{27}{3} [/tex]
[tex] x [/tex] > [tex] 9 [/tex]
Therefore, the inequality that represents Mary's possible age is: 0 < x < 9
solve equation by taking square roots n^2+4=40
Answer:
n = ±6
Step-by-step explanation:
n² + 4 = 40
n can be solved by finding the square root
n² = 40 - 4
n² = 36
n = √36
n = ±6
A 3/4 pound box contained 36 fruit
tarts. How many tarts would be in a
one-pound box?
On Friday, the temperature was 82°F. The temperature changed by –2°F on Saturday, and then it changed by 5°F on Sunday. What was the temperature on Sunday? How did the temperature change?
Answer:
the temp on Sunday was 85, it changed by going down 2 degrees, and up 5 degrees
Step-by-step explanation:
when it says -2 degrees F its basically saying subtract 2, and then go on and add 5
Answer:
it was 85 goes up by 3
Step-by-step explanation:
1. A standard dice has 6 sides with the numbers 1-6 on it. What is the probability of rolling a 4 on a
standard dice?
Answer:
1/6
Step-by-step explanation:
There are six sides on a die and only one of them has a 4
P( 4) = number of sides with a 4/ total number of sides
= 1/6
Answer:
P (4) = 1/6
Step-by-step explanation:
The probability can be found by creating a fraction. The numerator is the number of favorable outcomes and the denominator is the total number of outcomes.
P (4) = sides with a 4 / total sides
The standard dice has 6 sides numbered 1 through 6.
P (4) = sides with a 4/ 6
Only one side on the cube has a 4.
P (4) = 1/6
This fraction cannot be simplified further, so it is our final answer.
The probability of rolling a 4 on a standard dice is 1/6
Write the sentence as an equation. A number added to -6 is -33
Answer:
x+(-6)= -33
hope that helps : )
Answer: x+-6=-33
Step-by-step explanation: The x is a variable which is added to -6 which equals -33.
There are three numbers. The first number is twice the second number. The third number is twice the first number. The sum of the three numbers is 112.
Answer:
x = 32 y = 16 z = 64
Step-by-step explanation:
x is the 1st number
y is the 2nd number
z is the 3rd number
The first number is twice the second number so
x = 2 y
The third number is twice the first number.
z = 2 x
Their sum is 112
x + y + z = 112
Plus in what we know:
x + y + z = 112
2 y + y + 2x = 112
3y + 2x = 112 Let's solve for y and subtract 2x from each side
3y = 112 - 2x Divide both sides by 3
y = [tex]\frac{112 - 2x}{3}[/tex]
Now plug our answer back in to solve for x.
x = 2y
x = 2 ( [tex]\frac{112 - 2x}{3}[/tex] )
x = (224 - 4x) / 3 Multiply each side by 3.
3x = 224 - 4x Add 4x to each side
3x + 4x = 224
7x = 224 Divide each side by 7
7x / 7 = 224 / 7
x = 32
Now we can solve for z.
z = 2x
z = 2 ( 32 )
z = 64
Now we can solve for the numerical value of y.
x + y + z = 112
32 + y + 64 = 112
96 + y = 112 Subtract 96 from each side.
y = 112 - 96
y = 16
Answer:
1st number = 36
Second = 16
Third = 64
Step-by-step explanation:
We have 3 numbers
Let's call the second number g
Then the first would be , 2x g = 2g
Then the third would be twice the first = 2 x 2g = 4g
We add up all numbers and equate it to 112
2g + g +4g = 112
7g = 112
g = 112/7
g = 16
First number = 2g = 2x16 = 32
Second number = g = 16
Third number = 4g = 4x16 = 64
Therefore the numbers are 32, 16, 64.
I hope this helps!
Powers of 10 with positive exponents are:
less than 1
greater than 1
Answer:
greater than 1
Step-by-step explanation:
A grocery store has small bags of apples for 5$ and large bags of apples for 8$. If you buy 6 bags of apples and spend 45$, how many of each bags did you buy?
Answer:
He bought 1 small bag and 6 large bags.
Step-by-step explanation:
We can set up 2 equations with the given information.
5x+8y=45
x+y=6
We can rearrange the second equation to solve for x.
x=6-y
Now we substitute x for 6-y in the first equation
5(6-y)+8y=45
30-5y+8y=45
30+3y=45
y+10=15
y=5
x=1
He bought 1 small bag and 6 large bags.
Of the students at Milton Middle School, 110 are girls. If 50% of the students are girls, how many total students are there at Milton middle school
Answer:
220
Step-by-step explanation
a line of best fit for the data is y=0.9x-4.5, where x represents age in year, and in years, and y represents hourly pay, in dollars.Based on the data, what is the best prediction for the hourly pay of a 25 year old?
Answer:
$18
Step-by-step explanation:
Given:
y = 0.9x - 4.5
Where,
x = age in years
y = hourly pay in dollars
what is the best prediction for the hourly pay of a 25 year old?
That is, find y when x=25
y = 0.9x - 4.5
= 0.9(25) - 4.5
= 22.5 - 4.5
= 18
y = $18
The prediction for the hourly pay of a 25 year old is $18
Answer:
$18:00
Step-by-step explanation:
Thank You To The Guy Above Me
If n represents a number, then write an
expression for two less than one fourth of n.
Answer:
n = n/4 - 2
Step-by-step explanation:
n = 1/4 * n - 2
= n/4 - 2
hi pls help urgent <3
Answer:
-548
Step-by-step explanation:
Let x be the number
Plug x in: x - -150 = -398Simplify: x + 150 = -398Subtract 150 from each side, so it now looks like this: x = -548I hope this helps!
If I am in Vermont, then I am in the North.
Write the converse of the conditional. Choose the correct answer below.
O A. If I am not in Vermont, then I am not in the North.
O B. If I am in the North, then I am not in Vermont.
C. If I am not in the North, then I am not in Vermont.
D. If I am in the North, then I am in Vermont.
Which statement is supported by the histograms? The two data sets have the same distribution and same range. The two data sets have the same distribution but different ranges. The two data sets have different distributions but the same range. The two data sets have different distributions and different ranges.
Answer:
The two data sets have different distributions and different ranges.
Step-by-step explanation:
When you subtract for both of the ranges they are different numbers. So that's the second part. The numbers along the bottom are different too so that is the different distributions.
Answer:
The two data sets have different distributions and different ranges.
Step-by-step explanation:
The shape of the data for German male adult heights is skewed left, but the shape of the data for female adult heights is close to symmetric. So, the two data sets have different distributions.
Each data set has the same minimum height of 145 centimeters. However, the maximum male adult height is 220 centimeters, and the maximum female height is 185 centimeters. So, the two data sets have different ranges.
Look at image for question
Answer:
P = 19.76 unitsStep-by-step explanation:
1. Finding [tex]\overrightarrow{AB}[/tex] (or [tex]\overrightarrow{BA}[/tex]):
[tex]\overrightarrow{AB}=\overrightarrow{OA}-\overrightarrow{OB}= \left[\big5\atop\big3\right]-\left[\big2\atop-\big5\right]= \left[\big5-\big2\atop\big3-(-\big5)\right]=\left[\big3\atop\big8\right][/tex]
2. Calculating length of [tex]\overrightarrow{OA}\,,\ \overrightarrow{OB}\ \text{and}\ \overrightarrow{AB}[/tex]:
[tex]|\overrightarrow{OA}|=\sqrt{5^2+3^2}=\sqrt{25+9}=\sqrt{34}\approx5.831\\\\ |\overrightarrow{OB}|=\sqrt{2^2+(-5)^2}=\sqrt{4+25}=\sqrt{29}\approx5.385\\\\ |\overrightarrow{AB}|=\sqrt{3^2+8^2}=\sqrt{9+64}=\sqrt{73}\approx8.544[/tex]
3. Calculating perimeter:
[tex]P=|\overrightarrow{OA}|+|\overrightarrow{OB}|+|\overrightarrow{AB}|=\sqrt{34}+\sqrt{29}+\sqrt{73}\approx5.831+5.385+8.544=19.76[/tex]
which two values of X are roots of the polynomial below?
Answer:
C and D
Step-by-step explanation:
As determinant of this quadratic equation is given by-
(-b±√(b²-4ac))/2a
26. Given the point A(-2,4) translate (x,y) → (x – 4, y - 3) and then reflect over the line y = -x.
What are the coordinates of the final image? (4 points)
Math
Greetings from Brasil...
Here is the graphical explanation in the annex.
A = (-2; 4)
A' = (-2 - 4; 4 - 2) = (-6; 1)
After reflection on F(X)
A'' = (-1; 6)A student has these scores on their assignments. The teacher is considering dropping
a lowest score. What effect does eliminating the lowest value, 0, from the data set have
on the mean and median?
0, 40, 60, 70, 75, 80, 85, 95, 95, 100
(A)What is the five-number summary for the data 2,2,4,4,5,5,6,7,9,15?
(B)When the maximum, 15, is removed from the data set,what is the five-number summary?
this is one of my math questions i need help on!
dude google works search it up sorry bro just needs some points you get it raight
Step-by-step explanation:
Robert and his friends are going into a grocery store. How much would it cost to buy 4 bananas and 5 peaches if each banana costs $0.40 and each peach costs $0.75? How much would it cost to buy 4 4 bananas and 5 5 peaches if each banana cost $ x $x and each peach cost $ y ? $y
Answer:
4*0.40+5*0.75=5.35
Step-by-step explanation:
Answer:
like so i could get points pls, answer is in screenhot lol
Step-by-step explanation:
One number is 9 more than twice another number. If the sum of the numbers is 129, find both numbers.
Answer:
40 and 89
Step-by-step explanation:
let x be the number then the other number is 2x + 9, then
x + 2x + 9 = 129, that is
3x + 9 = 129 ( subtract 9 from both sides )
3x = 120 ( divide both sides by 3 )
x = 40
Thus the numbers are
x = 40 and 2x + 9 = 2(40) + 9 = 80 + 9 = 89
Represent the following sentence as an algebraic expression, where "a number" is the
letter x.
The difference of 3 and a number.
Answer: 3 - x
Step-by-step explanation: With
Subtraction be careful. 3 - x is not the same as x - 3. You have to keep the values given in order.
please help lots of points
Answer:
see below
Step-by-step explanation:
The area is given by
A = l*w
A = (4x-1) ( 3x+6)
FOIL
first 4x*3x =12x^2
outer 6*4x = 24x
inner -1*3x = -3x
last -1 *6 = -6
Add together
12x^2 +24x-3x-6
12x^2 +21x-6
Answer:
The area is given by
A = l*w
A = (4x-1) ( 3x+6)
first 4x*3x =12x^2
outer 6*4x = 24x
inner -1*3x = -3x
last -1 *6 = -6
Add together
12x^2 +24x-3x-6
12x^2 +21x-6
Write the equation of a line that is perpendicular to y= 2/3x + 3 and passes through the point (4, -8).
Answer:
Step-by-step explanation:
Perp. : -3/2
y + 8 = -3/2(x - 4)
y + 8 = -3/2x + 6
y = -3/2x - 2
Subtract 10x + 7y from -15x+6y
Step-by-step explanation:
= -15x+6y-(10x+7y)
= -15x+6y-10x-7y
= -25x-y.
Answer: 4
Step-by-step explanation:
10 + 7 = 17
15 + 6 = 21
21 - 17 = 4
I don’t know but wanted to try it might not be right
PLEASE ANSWER ASAP!!! THIS IS MY LAST OF POINTS PLEASEEE!!! Solve for X. 15=7x+3-5x X=_(simplify your answer)
The number of books Jason reads each week is inversely proportional to the number of hours he spends with his friends if Jason read three books and spent four hours with his friends one week how many books does he read during the week in which he spent six hours with his friends
Answer:
Number of books= 2 books
Step-by-step explanation:
number of books Jason reads each week is inversely proportional to the number of hours
Let books be x
Let hours be y
X= k/y
Where k is constant of proportionality
Jason read three books and spent four hours
3= k/4
3*4= k
12= k
So
X= 12/y
If he spent six hours
Number of books x
X= 12/6
X= 2 books
Identify the incorrect Algebra forms that multiplication is represented in the expressions 5 times 3x.
A 5(3x)
B (5) x (3x)
C (5)3x
D 5(3)(x)
Answer:
5 x 3x = A 5(3x)
Step-by-step explanation: () = multiply
EX: 6(8) = 48
Given: -3(2x + 7) = -29 – 4x; Prove: x = 4
Answer:
See steps below
Step-by-step explanation:
-3(2x+7)=-29-4x
Use the distributive property
-6x-21=-29-4x
Add 21 to each side
-6x=-8-4x
Add 4x to both sides
-2x=-8
Divide by -2
x=4
I NEED HELP WITH THESE RNNNN!!!!!!!
Answer:
Step-by-step explanation:
hey please help!! Thank you <33
Answer:
4+6j
Step-by-step explanation:
[tex]4+(6\times j)\\4+6j[/tex]