Answer:
A spring balance measures the weight of an object by opposing the force of gravity acting with the force of an extended spring.
mrk brainliest?
Which list of elements is arranged in order of increasing atomic number?
Sr, Ca, Mg, Be
F, Cl, Br, I
B, C, Li, Be
Sc, V, Ti, Cr
Answer:
B. F, Cl, Br, I
Step-by-step explanation:
The atomic nunbers are 9, 17, 35, 53
Have a good day!
the product of a number and four
What is the slope-intercept equation of this line?
(0,4)
(2,-2)
A. y=-3x + 4
B. y = 4x - 3
C. y = 3x + 4
D. y = - 1/3 x+4
Answer:
A
Step-by-step explanation:
use both points to find the slope using the equation
y2-y1/x2-x1, so , -2-4/2-0 = -6/2 = -3. slope or m = -3
then the y int can be any y point, so either -2 or 4. in this case they used 4.
I WILL MARK BRAINIEST
I already did the other ones I just need help with the one I got wrong
the line passing through the points (-2,12) and (3, -23) intersects the line passing through which of these pairs of points
Answer:
Options (1), (2) and (3)
Step-by-step explanation:
To solve this problem we will use the property,
"A system of equations will have a unique solution if slopes of the linear equations are different"
Slope of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Slope of a line passing through (-2, 12) and (3, -23) = [tex]\frac{12+23}{-2-3}[/tex] = (-7)
Option (1)
Slope of a line passing through (-4, 17) and (5, -28) = [tex]\frac{17+28}{-4-5}[/tex] = (-5)
Option (2)
Slope of a line passing through (-2, 16) and (2, -20) = [tex]\frac{16+20}{-2-2}[/tex] = (-9)
Option (3)
Slope of a line passing through (-6, 14) and (4, -16) = [tex]\frac{14+16}{-6-4}[/tex] = (-3)
Option (4)
Slope of a line passing through (-3, 19) and (6, -44) = [tex]\frac{19+44}{-3-6}[/tex] = (-7)
Option (5)
Slope of a line passing through (-5, 32) and (3, -24) = [tex]\frac{32+24}{-5-3}[/tex] = (-7)
Slopes of options (1), (2) and (3) are different.
Therefore, Options (1), (2) and (3) will be the correct options.
Andre received and spent money in the following ways last month.Write a positive or negative number to represent money from his perspective. "Andre spent $10 on a book"
Step-by-step explanation:
Let the amount of money Andre has be $A.
Spending $10 on a book = A - 10
If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!
2. Karen bought a new car in 2001 for $34,000.00 She sold it in 2015 for $19,000.00. What was the percent of decrease? (round to whole percent)
what is y equals 5 times x equal
Answer:
multiple possibilities
Step-by-step explanation:
Y=5x
yx=5
it is unsolvable but have various possible answers:
y=5
x=1
(vise versa)
————
y=2.5
x=2
(vise versa)
Which number is composite?
53, 81, 41, 47,31
O41
81
31
47
Pls hurry its a test
Answer:
81
Step-by-step explanation:
A composite number is a number that can be divisible by more than 1.
81 can be divisible by 1 and 9.
-kiniwih426
MMM HEY PLEASE HELP. IM LITERALLY ABOUT TO END MYSELF.
Answer:
do not end urself please ur a good guy
Step-by-step explanation:
it's b not d
Which algebraic expression represents 10 less than a number?
A) n + 10
B) 10 - n
C) n - 10
D) 10n
Answer:
b
Step-by-step explanation:
b
The price of a new car is $20,000. If the sales tax rate is 6%, then how much sales tax is being charged?
Answer:
1,200
Step-by-step explanation:
-4.75=z/2
PLEASE HELP............
Answer: Z= -9.5
Step-by-step explanation:
write the division as a fraction
-4.75=1/2Z
Multiply both sides of the equation by 2
-9.5=Z
then swap the sides of the equation
Z= -9.5
And if they are asking for fraction form then its either
Z= - 19/2, or Z= -9 1/2
Brett shaded 4/8 of a sheet of notebook paper. Aisha says he shaded 1/2 of the paper. Are the two fractions equivalent? if so, what is another equivalent fraction
Answer:
60
Step-by-step explanation:
48
12
60
-5m-3m+6-3 = -13 Need help
Answer: m=2
Step-by-step explanation:
-5m-3m+6-3=-13
-8m+3=-13
-3 -3
-8m/-8 = -16/-8
m=2
Order the steps to solve -3x + 2.4 = 19.2.
1. Simplify to -3x=16.8
2. Divide both sides by -3
3. Simplify to x=-5.6
4. Subtract 2.4 from both sides
Quickly pls I’ll give brainliest
Answer:
1. Subtract 2.4 from both sides
2.Simplify to -3x=16.8
3.Divide both sides by -3
4. Simplify to x=-5.6
Evaluate the function f(x) = -4x + 2, when x = -1.
A. f(x) = -4
B. f(x) = -2
C. f(x) = 2
D. f(x) = 6
Answer:
Option D
Step-by-step explanation:
f(x) = -4x + 2
f(-1) = -4(-1) + 2 = 4 + 2 = 6
help asap plsplspls!! :)
Answer:
1.7
Step-by-step explanation:
1 + 7/10
= 1 + 0.7
= 1.7
help me pls pls pls
Answer:
11/50
Step-by-step explanation:
22/100 can b reduced to 11/50 :)
Louise puts 11.7 gallons of gas in her car for a total of $27. What did the gasoline cost per gallon? Round your answer to the nearest cent
Answer:
$2.31
Step-by-step explanation:
You divide 27 by 11.7 to find cost per gallon, and get 2.30769230769 but it says to round to nearest cent so you round to 2.31
What is the value of (h o k)(2)
Answer:
-3
Step-by-step explanation:
h(k(2)) = h(k(x=2)) = h(-2) = h(x= -2)= 3/( -2+1) = 3/-1= -3
Answer:
-3
Step-by-step explanation:
Sorry if I'm wrong.
Forty percent of students at a small college have brought their own personal computer to campus. A random sample of 120 entering freshmen was taken.
a. What is the standard error of the sample proportion bringing their own computer to campus.
b. What is the probability that the sample proportions is less than 0.33?
c. What is the probability that the sample proportion is between 0.38 and 0.46?
Answer: a. Standard Error = 0.045
b. P (p-hat<0.33) = 0.0606
c. P (0.38<p-hat<0.46) = 0.5782
Step-by-step explanation: The sample proportion is p-hat=0.4
a. Standard error of a sample proportion is calculated as:
[tex]SE=\sqrt{\frac{p(1-p)}{n} }[/tex]
with p=0.4 and n=120:
[tex]SE=\sqrt{\frac{0.4(1-0.4)}{120} }[/tex]
[tex]SE=\sqrt{0.002}[/tex]
SE = 0.045
The standard error of the sample proportion of students bringing their own computer is 0.045.
b. To determine the probability for sample proportions, first find the z-score:
P(p-hat < x) = [tex]P(z<\frac{x-\mu}{SE})[/tex]
[tex]P(p-hat<0.33)=P(z<\frac{0.33-0.4}{0.045} )[/tex]
P(p-hat < 0.33) = [tex]P(z<-1.55)[/tex]
Now, using z-score table, find the probability:
[tex]P(z<-1.55)[/tex] = 0.0606
Probability the sample proportion is less than 0.33 is 0.0606.
c. For probability between two proportions, find z-score for each number of the interval:
For p < 0.38:
P(p-hat < 0.38) = [tex]P(z<\frac{0.38-0.4}{0.045} )[/tex]
P(p-hat < 0.38) = [tex]P(z<-0.44)[/tex]
Using z-score table,
[tex]P(z<-0.44)[/tex] = 0.33
For p < 0.46:
P(p-hat < 0.46) = [tex]P(z<\frac{0.46-0.4}{0.045} )[/tex]
P(p-hat < 0.46) = P(z < 1.33)
Probability is
P(z < 1.33) = 0.9082
The probability of the interval is the difference of each probability:
P(0.38 < p-hat < 0.46) = [tex]P(z<1.33)-P(z<-0.44)[/tex]
P(0.38 < p-hat < 0.46) = [tex]0.9082-0.33[/tex]
P(0.38 < p-hat < 0.46) = 0.5782
Probability the sample proportion is between 0.38 and 0.46 is 0.5782.
6. In one state, sales tax is 6%. If sales tax on a car is $564.00, find the
price of the
car before tax.
Answer: $9400
Step-by-step explanation:
.06x = $564
divide both sides by .06
x = $9400
What two numbers add together give me -9 but multiply together give me 18
Answer:
one number is -6 and other is-3
Step-by-step explanation:
follow me
Mrs. Cole told Cameron that the score on his current quiz was 40% better than his previous. If Cameron had a score of 50 on his previous quiz, what is his current quiz score?
Answer:
70
Step-by-step explanation:
This may be 2 hours ago but at least I know what to do. You can just add 50 + 40%! 40% being .4 and 50 staying the same is in fact 70.
he got a 70.
Factor f(x)= 2x^4 -12x^3 +6x +20x
Answer:
f(x)= 2x(x^3-6x^2+13)
Simplify completely ASAPP
Answer:
5[tex]\sqrt{2}[/tex]
Step-by-step explanation:
Use the distributive property to write the next step in simplifying the equation.
Use the asterisk symbol (*) to represent multiplication.
-1(8 + x) = 7
5/6 x 9/10 simplified
Write -16.3 as a mixed number.
Answer:
-690/1000
Step-by-step explanation:
