Answer:5.3
Step-by-step explanation: you multiply 31 by 2 then you subtract the product of 31×2 from 78 then you divide that by three
PLEASE HELP!!!!!Find the equation of each line and then put each equation into the form Ax+By=C where A,B, and C are integers
through(-3,2) and parallel to the line joining (2,3) and (1,-2)
Answer:
y-5x-7=0
Step-by-step explanation:
m = -2-3/1-2
m=5
y-y1 = m(x-x1)
y-2=5(x+3)
y-2=5x +5
y-5x-7=0
The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1271 1187 1194 1250 1268 1316 1275 1317 1275 (a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.)
Answer:
The sample mean year is 1261 A.D.
The standard standard deviation is of 46 A.D.
Step-by-step explanation:
Sample mean:
Sum of all values divided by the number of values. So
[tex]x = \frac{1271+1187+1194+1250+1268+1316+1275+1317+1275}{9} = 1261.4[/tex]
Rounding to the nearest whole number, the sample mean year is 1261 A.D.
Sample standard deviation:
Square root of the sum of the difference squared between each value and the mean, divided by one less than the sample size. So
[tex]s = \sqrt{\frac{(1271-1261.4)^2+(1187-1261.4)^2+(1194-1261.4)^2+(1250-1261.4)^2+(1268-1261.4)^2+(1316-1261.4)^2+(1275-1261.4)^2+(1317-1261.4)^2+(1275-1261.4)^2}{8}} = 45.8[/tex]
Rounding to the nearest whole number, the standard standard deviation year is of 46 A.D.
I NEED HELP PLEASE HURRY
ITS B!!
BRANLIEST PLEASE and thanks
Answer: the turquoise option (teal?)
x[tex]\leq[/tex]$87.26
Step-by-step explanation:
subtract $50 from $137.26. that's how much you can spend without getting charged. $87.26. you can spend less than or exactly $87.26 without getting charged. for the inequality symbol, it would be [tex]\leq[/tex] (less than or equal to)
i have spanish assignments on that same exact website lol
Which of the following are solutions to the following equation?
4x^2-100=0.
Check all that apply.
A. 5
B. -10
C. -5
D. 10
Answer:x=5 or x=−5
Step-by-step explanation:
4x^2−100=0
Step 1: Add 100 to both sides.
4x^2−100+100=0+100
4x^2=100
Step 2: Divide both sides by 4.
4x^2/4=100/4
x^2=25
Step 3: Take square root.
x=±√25
x=5 or x=−5
Answer:
x=5 or x=−5
Please help!!
Find the coordinates of the vertex of the following parabola algebraically. Write your
answer as an (x, y) point.
y = 4x + 56x + 192
Answer:
The vertex of the parabola = (-7 , -4)
Step-by-step explanation:
Step(i):-
Given that the parabola y = 4 x² + 56 x +192
y = 4 (x² + 14 x + 48 )
y = 4 ( x² + 2 × 7 (x) + 49-1)
y = 4 ( x² + 2 × 7 (x) + 49)- 4
we apply the formula
(a +b)² = a² + 2ab + b²
y = 4 ( x + 7 )² - 4
Step(ii):-
The general form of the parabola in algebraically
y = a ( x-h)² +k
The equation
y = 4 ( x + 7 )² - 4
y = 4 ( x-(-7))² - 4
The vertex of the parabola (h,k) = (-7 , -4)
Final answer:-
The vertex of the parabola = (-7 , -4)
A jewerler had a fixed amount of gold
Answer:
ohhhhh and who is the jeweler
VI.
Molly paid $85 last month for her utilities. 55% of this amount was for electricity
a. How much did Molly pay for electricity?
What percentage of her money did she have left over?
c. What is the amount of leftover money Molly has for last month?
Answer:
$46.75
0.55 X 85 = $46.75
Hey i need help with this
Answer:
The x-intercepts are 1 and 3
The y-intercept is 3
The vertex is (2,-1)
The line of symmetry is x=2
Step-by-step explanation:
To find the x-intercepts, find where the graph intersects the x-axis, or the horizontal line. To find the y-intercept, find where the graph intersects the y-axis, or the vertical line. To find the vertex, find the coordinate where the graph is at its lowest point (or highest if it is flipped upside down). To find the line of symmetry, simple use the x-coordinate of the vertex and say x= (the x-coordinate)
While traveling to his grandmother's house for Christmas, George fell asleep halfway through the journey. When he awoke, he still had to travel half the distance that he had traveled while sleeping. For what part of the entire journey did he sleep?
he slept for 1/2 of the trip and then slept have the distance that was left so that would be 1/2 divided by 2 equals 1/4 so 1/2 plus 1/4 equals 3/4 so george has 1/4 of his journey left.
George was asleep for 33.3% of the journey.
When George went to sleep, he was halfway through to his grandmother's house which means that he was left with 1/2 of the journey.
When he woke up, he was still left with half of the distance he had slept. If we made this an expression and assume the percentage of the journey he slept was x, it would be:
1/2 of the journey = 1/2x + x
1/2 = 1.5x
x = 1/2 ÷ 1.5
x = 33.3%
George therefore fell asleep for 33% of the journey.
Find out more at https://brainly.com/question/14523771.
In a sale the normal price of a book is reduced by 30% what singles number must be i multiple by to reduce something by 30%
I need help
Step-by-step explanation:
This means the price of the book will decrease by 100%-30%=70%
70% decrease in x = 100% of x - 70% of x = 1x - 0.7x = (1 - 0.7)x = 0.3x So 0.3x represents a 70% decrease in x.
Notice that this multiplier .3 is the same as (30% of x).
the answer is 0.3.
Free brainlest! Just answer this....... WHAT IS BETTER PS4 OR Xbox if you get it right you can have it!
Answer:
Depends
Step-by-step explanation:
PS4 has a better gaming system and better games (Spiderman example)
But Xbox has the better controller. I think Xbox is better I prefer it but it doesn't really matter.
What is the starting term of 64?
Answer:
1
Step-by-step explanation:
One is the starting term
1, 2, 4, 8, 16, 32, 64, 128, 256,
PLEASE HELP ASAP!!!!!!!
Answer:
the wrong one is the last one
Step-by-step explanation:
because 9 times 40 doesnt = 350 it equals 360
On the number line, plot and label all numbers with an absolute value of 32. Where did you place the points?
Answer:
on 32 and -32
Step-by-step explanation:
PLEASE HELP ME ASAPPPPPPPPPPPPPPPPPPPPP
One number is equal to the square of another. Find the numbers if both are positive and their sum is 306.
Answer: 17 or -18
Step-by-step explanation:
x^2+x=306
x^2+x-306=0
(x-17)(x+18)=0
x-17=0
x=17
x+18=0
x=-18
..i think this is the right answer
Members of the student council are selling T-shirts. The number of T-shirts sold and the amount of money collected each day is shown in this table.
T-shirt Sales
Day
T-Shirts Sold
Amount Collected
Monday
12
$180
Tuesday
15
$225
Wednesday
21
$315
Thursday
17
$255
Friday
$570
Part A: Determine the unit rate for the amount of one T-shirt. Explain how you determined the unit rate.
9514 1404 393
Answer:
$15
Step-by-step explanation:
The desired rate is ...
"unit rate" = cost/T-shirt = $180/(12 T-shirts) = $15/T-shirt
__
The unit rate is based on its definition. Here, the rate of interest is the cost per shirt, so it is found by dividing the cost by the number of shirts.
Which of the following conversions is correct?
A. 1 cup is equivalent to 2 pints.
B. 4 pints is equivalent to 1 quart.
C. 1 gallon is equivalent to 128 fluid ounces.
D. 1 quart is equivalent to 8 cups.
Answer:
C. 1 gallon is equivalent to 128 fluid ounces.
Step-by-step explanation:
When building a house, the number of days required to build is inversely proportional
to with the number of workers. One house was built in 132 days by 4 workers. How
many days would it take to build a similar house with 16 workers?
Answer: 33
Step-by-step explanation:
Please answer or give the steps to answer please please please this is my state test and i can’t fail
Answer:
1. 466.3ft
2. 12.1m
Step-by-step explanation:
1.
Imagine this as a triangle like shown in pic attached, then use tan to find 'x', the distance between the base of the tower and the fire:
tanA=opposite/adjacent
tan25=x/1000
x=100tan25
x=466.3ft
2.
Imagine this as a triangle like shown in pic attached, then use sine to find 'x', the kite's vertical height above the boy's hand:
sinA=opposite/hypotenuse
sin12=x/50
x=50sin12
x=10.4m
The kite's height off the ground is this plus the height of the boy's hand from the ground: 10.4+1.7=12.1m
What volume of 1M HCI would be needed
to neutralize 50mL of 1M Ca(OH)2?
Answer: 100
Step-by-step explanation: BRAINLIEST
Maria noticed that a fork in the road created 3 angles. If two angles are as shown, what is the measure of angle x?
А
135°
00
140°
с
145°
D
150°
The measure of angle x will be 145° so option (C) will be correct.
What is an angle?
An angle is a geometry in plane geometry that is created by 2 rays or lines that have an identical terminus.
Since we lack a measurement for angular rotation, the angle is a valuable tool for measuring angular distance. For instance, a meter or an inch is a unit of measurement for linear motion.
The identical endpoint of the two rays—known as the vertex—is referenced as an angle's sides.
The angle all around the line is 360°.
The angle 165°, 50°, and x consist total of 360°.
165 + 50 + x = 360
x = 145°.
So the angle of x will be 145°.
For more about the angle
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9. The ratio of Joe's weight to Colin's is 2:3. Colin's weight is 36kg. If Joe gains
3 kg, what will be the new ratio of Joe's weight to Colin's?
if a 4.0 cm X 5.5 cm photo is enlarged so that is length is 8.5 what s the new width?
Answer:
6
Step-by-step explanation:
Which term could be put into the blank to create a fully simplified polynomial written in standard form
Answer:
[tex]x^{2} y^{2}[/tex]
Step-by-step explanation:
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is [?].
Answer:
0
Step-by-step explanation:
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is [0].
That is why the x-intercepts are called zeros.
Answer:
0
Step-by-step explanation:
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is 0.
Solve the inequality.
5q + 22-13
Answer:
The answer is 5q + 9.
Step-by-step explanation:
1) Collect like terms.
[tex]5q + (22 - 13)[/tex]
2) Simplify.
[tex]5q + 9[/tex]
hence, the answer is 5q + 9.
Kim and Steven went to dinner. Kim had a coupon for a 25% discount off the price of all meals, not including tax and tip, if the original price of meals was $75.00, what is the discounted price, not including tax and tip?
Answer:
The discounted price, not including tax and tip is $56.25.
Mr.Rosenthal wants to make gumbo a type of soup he buys some shrimp for $7.95 an onion for 0.26 and a bunch of celery for $1.03 how much dose he spend on the ingredients
Answer:
$9.24
Step-by-step explanation:
7.95+1.03+.26 = 9.24
|x-3|= - 2 1/4 Math question
Answer:
No solution
Step-by-step explanation:
Absolute value can not output a negative result
