Answer:
D
Step-by-step explanation:
This is because they are both mulitplied by two so they are still equivalent
Solve the system of equations.
-5x + 4y = 3
x=2y-15
Show Calculator
Answer:6
Step-by-step explanation:don't know
Answer:
12
Step-by-step explanation:
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point Form: ( 9 , 12 ) Equation Form: x = 9 , y = 12
Two customers went to a sports shop to buy baseballs and gloves. Each Baseball cost the same amount and each glove costs the same amount.
- The first customer paid $60 for four baseballs and two gloves
- The second customer paid $84 for five baseballs and three gloves
What was the cost in dollars of each baseball?
Answer:
$6.00
Step-by-step explanation:
Using a system of equations, it is found that each baseball costs $6.
For our system, we are going to say that:
x is the cost of a baseball.y is the cost of a glove.The first customer paid $60 for four baseballs and two gloves, hence:
[tex]4x + 2y = 60[/tex]
Simplifying by 2:
[tex]2x + y = 30 \rightarrow y = 30 - 2x[/tex]
The second customer paid $84 for five baseballs and three gloves, hence:
[tex]5x + 3y = 84[/tex]
Since [tex]y = 30 - 2x[/tex]
[tex]5x + 3(30 - 2x) = 84[/tex]
[tex]5x + 90 - 6x = 84[/tex]
[tex]x = 6[/tex]
Each baseball costs $6.
A similar problem is given at https://brainly.com/question/24778333
2.
Hugh is at the gym using an exercise bike. The bike counts each mile as 1 lap.
If Hugh bikes 16 laps, how many miles does he bike?
A
3 miles
B.
4 miles
C.
16 miles
D.
64 miles
Answer :B 4 miles
thank me later
eric has 80 baseball cards in his collection. of these cards 20% of the cards are from the texas rangers. how many cards from erics collection are from the texas rangers
Answer:
The answer for this problem is 60
Step-by-step explanation:
So we know Eric has 80 cards right ? ye sew do cf v eknbauefsgbduiwjxnsizjdg fyj eaoX
Answer:
16 cards out of the 80 are Texas Rangers, 1 of them better be Nolan Ryan or Beltre
Step-by-step explanation:
16 divided by 80 is 20%
A basketball player made baskets on 60% of her attempts. If she attempted 42 throws, how many baskets did she make?
Answer:
26 shots.
Step-by-step explanation:
60% of 42 is 25.2 but you can't make .2 of a shot so you have to round up.
-k=7 integers equation
Answer:
-7
Step-by-step explanation:
A negative negative is a positive, because you are basically doing a negative times a negative which is a positive
Answer the following questions about the following polynomial
Answer:
There is no polynomial
Step-by-step explanation:
Show polynomial
please help me with 168÷45
Answer:
3.73 ( The three is infinite)
Step-by-step explanation:
Solve for x. 4x+6=134
Answer:
x=31
Step-by-step explanation:
4x+6=134
-6 -6
4x=124
4 4
x=31
Answer:
X=32
Step-by-step explanation:
134-6=128
128÷4=32
4(32)+6=134
write and equation in slope intercept form for the following scenario. andy’s rental car charges an initial fee of $20 plus an additional $30 per day to rent a car
Answer:
y = 30x + 20
Step-by-step explanation:
y = mx + b
find b
b=20
find m
m=30
How many solutions are in this graph?
Answer:
One solution
Step-by-step explanation:
Only one solution, as the lines intersect only at (-2,2).
Brainliest if you provide a valid explanation!
*IF YOU STEAL POINTS YOU WILL BE REPORTED*
Q: The table shows the weights of apples at a grocery store. If this represents a proportional relationship, what is the weight of 12 apples? Remember to explain your answer :)
Step 1: So to start us off, because every 5 apples weighs 0.60 kilograms, we're going to divide 0.60 by 5 to get the weight of ONE apple.
0.60 divided by 5= 0.12
Now we know how much a single apple weighs in kilograms and we can move onto the next step.
Step 2: The next step is to times the weight of one apple by 12 because that would give us our answer for the weight in kilograms of 12 apples.
0.12 times 12=1.44
Hopefully, this is correct and helps you! Sorry if I made any errors, it would be best to go back and do the steps yourself just to make sure if that makes you feel any better. Good luck! xxoo
-Sav
Answer:
1.44kg
Step-by-step explanation:
If they are proportional then you can use the unitary method:
If 5 apples=0.6kg then 1 apple=0.12kg as this is 0.6/5 (because you divided the apples by 5 so you have to do the same to the kg)
then you can work out that 12 apples=1.44kg because 0.12*12 is 1.44 and you multiply by 12 as this is what you multiplied the apples by so (becasue they are proportional then you have to do the same to the kg)
hope this helps :)
Adam has two brothers, Ben and Chris, and one sister, Daisy. On any given day, Ben calls Adam with Probability 0.3, Chris calls Adam with Probability 0.4, and Daisy calls Adam with probability 0.7. let X be the number of siblings that call Adam tomorrow. Find the expectation of X.
Hint: Express X as the sum of suitable indicator random variables.
Answer:
The expected value of X = 1.4
Step-by-step explanation:
Given that:
The probability of Ben calling Chris = 0.3
The probability of Chris calling Adam = 0.4
The probability of Daisy calling Adam = 0.7
The probability distribution function can be calculated as follows:
P(X = 0) = P( nobody calls Adam)
= (1 - 0.3)×(1 - 0.4)×(1 - 0.7)
= 0.7 × 0.6 × 0.3
= 0.126
P(X = 1) = P(if only Ben call +if only Chris call + if only Daisy call)
P(X = 1) = 0.3 × (1-0.4) × (1-0.7) + (1-0.3) × 0.4 × (1 - 0.7) + (1 - 0.3) × (1-0.4) × 0.7
P(X = 1) = (0.3 × 0.6 × 0.3) + (0.7 × 0.4 × 0.3) + (0.7 × 0.6 × 0.7)
P(X = 1) = 0.432
P(X = 2) = P(if only Ben & Chris Call + if only Ben & Daisy call + if only Chris & Daisy call)
P(X = 2) = 0.3 × 0.4 × (1 - 0.7) + 0.3 × 0.7 × (1 - 0.4) + (1 - 0.3) × 0.4 × 0.7
P(X = 2) = ( 0.3 × 0.4 × 0.3 ) + (0.3 × 0.7 × 0.6) + (0.7 × 0.4 × 0.7)
P(X = 2) = 0.358
P(X = 3) = P(i.e. all three call) =0.3 × 0.4 × 0.7 = 0.084
Therefore; the expected value of X is calculated by using the formula:
[tex]E(X) = \sum x P(X=x)[/tex]
E(X) = (0 × 0.126) + (1 × 0.432) + (2 × 0.358) + (3 × 0.084)
E(X) = 0 + 0.432 + 0.716 + 0.252
E(X) = 1.4
Thus, the expected value of X = 1.4
Jamaal has 20 models of planes and cars. He has three times as many cars as planes. What is the ratio of his cars to total models?
1:4
3:1
3:4
4:3
Answer:
i believe its 3/4
Step-by-step explanation:
i took the test on edge 2021
Two less than three times a number is between -11 and 1. solve.
Answer:
X=0.667
Step-by-step explanation:
3x-2=0
3x=2
X=2/3
X=0.667
2 3/5 ÷ 2/7
9 1/10
26/35
6/35
4 1/10
choose one please
Answer:
The answer is 91/10
Step-by-step explanation:
hope this helps
Solutions:
2 3/5÷2/7
13/5÷2/7
13/5×7/2
=13×7=91
=5×2=10
That's why the answer is 91/10
Emma decided to start a snow globe collection. She started with 3, and every year she added one more.
Write an equation to determine the number of snow globes she has after y years.
Answer:
3 + 1y, y = amount of years
Step-by-step explanation:
3 represents how much she has from the beginning, and 1y represents 1 year
David buys a CD for $14.95. The sales tax is 8%. How much sales tax will he pay?
Answer:
He will pay $1.20 sales tax.
Step-by-step explanation:
Someone help please and leave a small explanation if u want brainliest!
Answer:
C
Step-by-step explanation:
I believe the answer is C because both lines cross through point 1,1
What do you pay in tax for a pair of jeans that are priced $50.00 if there is 7% sales tax
$3.50
$7.14
$0.35
$3.55
Answer:
I think the answer is $3.50, but I am not sure. Just doing quick math over here :)
Given f(x) = 2x3 + ks – 4, and the remainder when f(x) is
divided by 3 + 2 is –18, then what is the value of k?
Answer:
15
Step-by-step explanation:
the instructor has save $3500 and rents an apartment for $275 monthly. he believes the point 6, 1850 would be on the equation of the lines. is he correct? explain how to check if a point is on a line.
Answer:Yes, he is correct
Step-by-step explanation:Plug 6 in as your x-value in the equation y=-275x+3500 and you will get y=1850
Please help with this question!!!!
A
thats where anything with 2 negatives are
Answer:
A
Step-by-step explanation:
in quadrant III
Montel collected 26Leaves for his science project he wants to put six leaves on a page how it shows how many pages Montello need
Answer:
4.3 pages
beacause 26 divided by 6 is 4.3
Terrel has 8 nickels. Heather has twice as many nickels as Terrel. Heather spends 4 nickels to buy a pencil. Each nickel is worth 5 cents. Which expression shows how many cents Heather has left?
Answer:
12*5=x
Step-by-step explanation:
A singer makes 2% royalties on the sales of her album. Which proportion could be used to determine her sales if she made $44,000 in royalties?
The attachment are the answers to look at
what is the sum to ?×?÷?=297
Answer:
Step-by-step explanation:
Therefore, three consecutive integers that add up to 297 are 98, 99, and 100. We know our answer is correct because 98 + 99 + 100 equals 297 as displayed above.
Answer:
add up to 297 are 98, 99, and 100. We know our answer is correct because 98 + 99 + 100 equals 297 as displayed above.
In a simple regression analysis (where y is a dependent and x an independent variable), if the slope is positive, then it must be true that _____.
a. there is no correlation between x and y
b. there is a negative correlation between x and y
c. there is a positive correlation between x and y
d. the y-intercept is 0
Answer:
c. there is a positive correlation in-between x and y
Step-by-step explanation:
A regression line is a line that suggests that all the points in a scatter diagram lie on or near one particular line. In a simple regression analysis in which y is the dependent variable and x is the independent variable. If the slope is positive, the bivariate data is also said to have a positive correlation. The positive correlation in-between two variables x and y implies that in general, an increase in x goes hand in hand with an increase in y.
Regression Analysis is defined as the set of statistical and reliable processes for establishing the relationship between the independent and dependent variables.
The correct statement can be given as:
In a simple regression analysis (where y is a dependent and x an independent variable), if the slope is positive, then it must be true that there is a positive correlation between x and y.
The regression line suggests that all the points lie near a particular line. It can be explained as:
1. In a simple regression analysis, the dependent variable is y.
2. Similarly, the independent variable is x.
3. Given, if the slope is positive, then the correlation will be positive.
4. The positive relation implies that if x increases then they will also increase in simple regression analysis.
Thus, in the simple regression analysis there exists a positive correlation between x and y.
To know more about simple regression lines, refer to the following link:
https://brainly.com/question/7656407
The product of Mia‘s Height and 4 is 52
Answer:
52+4? that's 56. the simplified version 4ft 6in
Step-by-step explanation:
A measurement template with a historcal value of 25.500 is measured 27 times and a mean value of 25.301 is recorded. What is the percent bias when the tolerence is -0.3?
Complete Question
A measurement template with a historical value of 25.500 mm is measured 27 times and a mean value of 25.301 mm is recorded. What is the percent bias when the tolerance is +/- 0.3?
Answer:
The percent bias is [tex]B = 33.167 \%[/tex]
Step-by-step explanation:
From the question we are told that
The historical value is [tex]S = 25.00 \ mm[/tex]
The number of times it is measured is n = 7
The mean value is [tex]\= x = \frac{\sum x_i }{n} = 25.301 \ mm[/tex]
The tolerance is [tex]t =\pm 0.3 = 0.3 - (-0.3) = 0.6[/tex]
Generally the percent bias is mathematically represented as
[tex]B = 100 * \frac{\= x - \tau }{ t}[/tex]
=> [tex]B = 100 * \frac{25.301 - 25.5000 }{0.6}[/tex]
=> [tex]B = 33.167 \%[/tex]