Answer:
4
Step-by-step explanation:
12x>48 so divide 48 by 12 to solve for x so x is 4
(GRADE7MATH) Can somebody plz answer all the questions correctly and show ur answer..thanks!!
(Only if u done this before)
WILL MARK BRAINLIEST) :D
Answer:
7. 28
8. -40
9. 36
10. -18
11. -32
12. -49
13. -33
14. 30
Step-by-step explanation:
Multiply as normal. If the signs are different, the product is negative. If the signs are the same, the product is positive.
Answer:
7. 28
8. -40
9. 36
10. -18
11. -32
12. -49
13. -33
14. 30
Step-by-step explanation:
+ × + = +
+ × - = -
- × - = +
- × + = -
can someone please help me with this :( asap
b
こんにちは
mmmmmmmmnnnnnnnnnnnnnnnnnnnnnnn
Pekka tosses a ball out of a window that is 40 feet in the air. Its initial velocity is 15
feet per second. The path of the ball is represented by
h = -16t2 + 15t + 40
How long does it take for the ball to hit the ground (in seconds) rounded to the
nearest hundredth?
Answer:
2.12 seconds
Step-by-step explanation:
Given
[tex]h(t) = -16t^2 + 15t + 40[/tex]
Required
Determine how long the ball hits the ground
When the ball hits the ground means that [tex]h(t) = 0[/tex]
So, we have that:
[tex]h(t) = -16t^2 + 15t + 40[/tex] becomes
[tex]0 = -16t^2 + 15t + 40[/tex]
Reorder
[tex]-16t^2 + 15t + 40 = 0[/tex]
Multiply through by -1
[tex]16t^2 - 15t - 40 = 0[/tex]
Solve using quadratic:
[tex]t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}[/tex]
Where
[tex]a = 16[/tex] [tex]b = -15[/tex] [tex]c = -40[/tex]
So, we have:
[tex]t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}[/tex] becomes
[tex]t = \frac{-(-15)\±\sqrt{(-15)^2 - 4*16*-40}}{2*16}[/tex]
[tex]t = \frac{15\±\sqrt{(-15)^2 - 4*16*-40}}{2*16}[/tex]
[tex]t = \frac{15\±\sqrt{225 +2560}}{32}[/tex]
[tex]t = \frac{15\±\sqrt{2785}}{32}[/tex]
[tex]t = \frac{15\±52.77}{32}[/tex]
Split:
[tex]t = \frac{15+52.77}{32}[/tex] or [tex]t = \frac{15-52.77}{32}[/tex]
[tex]t = \frac{67.77}{32}[/tex] or [tex]t = \frac{-37.77}{32}[/tex]
[tex]t = 2.12[/tex] or [tex]t = -1.18[/tex]
But time can't be negative
So:
[tex]t = 2.12[/tex]
Hence, time to hit the ground is 2.12 seconds
Samir is getting balloons for his mother's birthday party. He wants each balloon string to be 9 feet long. At the party store, string is sold by the yard. If Samir wants to get 59 balloons, how many yards of string will he need?
Answer:
177 yards
Step-by-step explanation:
3 feet - 1 yard, so we have 3 yards for each balloon.
He wants 59 balloons, so 59 x 3 = 177
simply : b2 • b3 • b
(• = divide)
Answer:
Step-by-step explanation:
Is it b^2 divided by b^3 divided by b?
If so, the answer is 1/b^2
Choose the statistic that is considered a measure of spread.
Mean
Standard deviation
Mode
Median
Answer:
The standard deviation is considered a measure of spread.
Step-by-step explanation:
Standard deviation is basically considered a measure of spread, measuring how far data values are from their mean.
Standard deviation helps in determining the nature of the variation of the data about the mean.For instance, in certain data sets, we may observe the same mean, but their range could be different, and data values in one data set may have been closely concentrated near the mean than the other data set values.
For example,
considering the data set
[tex]15, 15, 15, 14, 16[/tex]
The given data set has a mean: 15
considering the second data set
[tex]2, 7, 14, 22, 30[/tex]
The given data set has also a mean: 15
But, the values in the second data set are clearly more spread out. When the values of a data set are not spread out largely, then the set will have a low standard deviation.
Therefore, the standard deviation is considered a measure of spread.
what is the slope of the line that passes through the points (2,-3) and (-2,5)
Answer:
-2
Step-by-step explanation:
m = 5-(-3) / -2-2
m = 5+3/-4
m = 8/-4
m = 2/-1
m = -2
Please give a step by step explanation with the reasons. Thank you.
Answer:
Because angle 5 and angle 6 equal each other, it would mean that 4 and 7 equal each other. The sum of angles 4 and 5 is 180 because they are on the same line, intersected by another line. This means that they are supplementary angles. Since angles 5 and 6 equal each other, the other part of the the supplementary angle on both sides must equal each other. For example, if angles 5 and 6 equaled 60 degrees, the counterparts on the supplementary angle on both sides would have to be 120 to get to final sum of 180. This shows how angle 4 and 7 have to equal each other if 5 and 6 also equal other. Hope this helped! If its still confusing leave a comment and ill explain it in a different way. Good luck!
Selena wants to sell hot dogs at a local sports arena. She must pay a fee of $25 $25 to sell hot dogs and estimates each hot dog will cost her $0.75 $0.75 . Selena plans on selling each hot dog for $2.00 $2.00 . What is the minimum number of hot dogs ( x x ) Selena needs to sell for the revenue to be greater than or equal to her cost?
Answer:
20
Step-by-step explanation:
Let the cost of 1 hot dog be $x.
2x ≥ 25 + 0.75x
2x - 0.75x ≥ 25
1.25x ≥ 25
x ≥ 20
Please help! 30 points!
Use the numbers:
6 3 5 4 2 1
in that order to make 100. Use brackets and the four operations.
Answer:
(6*3+5+2)*4/1 or (6*3+4-2)*5/1
Step-by-step explanation:
Have a great day :)
Answer:
((6 x 3 + 4/2) x 5 ) / 1
The amount a basketball coach spends at a sporting goods store depends on the number of basketballs the coach the coach buys. The situation is represented by the function rule a=16b.
Complete the following table of values.
Investors buy a studio apartment for $180,000. Of this amount, they have a down payment of $36,000. Their down payment is what percent of the purchase price? What percent of the purchase price would a $72,000 down payment be?
Their down payment is *blank*% of the purchase price.
Answer:
36,000 would be 20 percent. 72,000 would be 40 percent.
Step-by-step explanation:
You just divide 36,000 by 180,000
9 ≤ 6+ 9 < 9 solve for the inequality
Answer:
U cant solve this bruh lol
Step-by-step explanation:
Consider the line y = 2x–4.
What is the slope of a line parallel to this line?
What is the slope of a line perpendicular to this line?
Parallel slope = 2
This is because the original line has slope 2. Parallel lines have equal slopes.
--------------------------
Perpendicular slope = -1/2
The original slope 2 or 2/1 turns into -1/2 after flipping the fraction and the sign. Note the original slope and perpendicular slope multiply to -1. This is true for any pair of perpendicular lines where neither line is vertical.
Answer:
the slope of the parallel line is 2x
the slope of line perpendicular is -1/2
Step-by-step explanation:
Plz plz help help help plz plz help plz
Answer:
since your adding to hours each time youll have 11, then the answer would be d the last one :)
Step-by-step explanation:
Answer:25.50 an hour
Step-by-step explanation:
Choose the equation below that represents the line passing through the point (−3, −1) with a slope of 4. (1 point)
A.) y − 1 = 4(x − 3)
B.) y + 1 = 4(x + 3)
C.) y − 3 = 4(x + 1)
D.) y + 3 = 4(x − 1)
Kevin is choosing between two cell phone plans that offer the same amount of free minutes. AT&T’s plan charges $19.99 per month with additional minutes costing $0.35. Verizon’s plan costs $34.99 with additional minutes at $0.30. How many additional minutes, a, will it take for the two plans to cost the same? *
Answer:
300 minutesStep-by-step explanation:
Step one:
Given data
AT&T’s plan
monthly charge= $19.99
additional charge per minute= $0.35
let the number of minutes be x
let the total charges be
y=0.35x+19.99----------1
Verizon’s plan
monthly charge= $34.99
additional charge per minute= $0.3
let the number of minutes be x
let the total charges be
y=0.3x+34.99----------2
Step two:
equating the two equations above we have
0.35x+19.99=0.3x+34.99
collect like terms
0.35x-0.3x=34.99-19.99
0.05x=15
divide both sides by 0.05
x=15/0.05
x=300
For the two plans to cost the same, it will take 300 minutes
Answer:
300 Minutes
Step-by-step explanation:
The total for the two items (without tax) was $151.48. The price of the backpack was $65.49. What was the price of the calculator?
Answer:
The price of the calculator was $85.99
Step-by-step explanation:
Equation: 65.49 + x = 151.48 Subtract: x = 85.99THIS IS MY 4TH TIME POSTING THIS (I did it on my other account )Abby has just started training for a marathon. She ran 15 miles in total during her first week of training. She wants to add an additional 2 miles to her weekly total during each subsequent week. Write an explicit rule for the arithmetic sequence that represents this situation, and use it to find how many miles Abby will run during her twelfth week of training.
Please show work for full credit
Answer:
She will run 202 miles in 12 wks.
Step-by-step explanation:
y = 17x + 15
15 represents the # of miles she ran in the first week.
17 represents the amount of miles she will run each week
x represents the # of weeks
y = the total # of miles in 12 weeks.
To solve plug in 11 for x since she ran 15 miles the first week she has 11 more to go.
y = 17(11) + 15
y = 187 + 15
y = 202
Hope this helps!
202 miles Abby will run during her twelfth week of training.
What is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
Given:
let the number of weeks she walk x.
As she ran15 miles in the first week.
and, she run 17 miles in each week.
let y be the total of miles in 12 weeks.
Then, the equation can be
y = 17x + 15
y = 17(11) + 15
y = 187 + 15
y = 202
Hence, 202 miles Abby will run during her twelfth week of training.
Learn more about Algebra here:
https://brainly.com/question/24875240
#SPJ2
Can Anybody Help With Geometry?
Answer:
SAS
Step-by-step explanation:
Side Angle Side: It shows only one angle and shows that 2 sides are congruent.
Answer:
It is SAS. Please mark brainliest.
Step-by-step explanation:
What integer represents a gain of 2 pounds?
Answer:
+2
Step-by-step explanation:
Triangles ABC and DEF are similar. Find e.
A.) 11
B.) 12
C.) 10
D.) 9
Write and evaluate the expression. Then, complete the
statements.
Miguel gave away five of the puppies.
Evaluate when p = 7.
Answer:
Step-by-step explanation:
Answer:First, write the expression
✔ p – 5
.
Second,
✔ substitute
7 in for the variable, p.
Third,
✔ simplify
by
✔ subtracting
7 and 5.
The answer is
✔ 2
Step-by-step explanation:
Alison wants to distribute the carnations and roses equally among the 6 flower shops. Factor the expression from Part A using 6 as the common factor. How does the factored expression help Alison determine how many carnations and how many roses each flower shop should get?
Answer:
6
Step-by-step explanation:
Passes through (-6,-1) and is parallel to y=-2/3x+1
Answer:
y=-2/3x-6
Step-by-step explanation:
y=mx+b
m=-2/3
y-y=m(x-x1)
y-(-1)=-2/3(x-(-6))
y+1=-2/3x-4
-1 -1
y=-2/3x-5
Answer:
[tex]y=-\frac{2}{3}x -5[/tex]
Step-by-step explanation:
Slope-intercept form:
[tex]y=mx+b\\\\y=(slope)x+(y-intercept)[/tex]
m is the slopeb is the y-interceptx and y are corresponding coordinate points (x,y)When two lines are parallel, their slopes are the same. Take the slope from the given equation and insert into the new:
[tex]y=-\frac{2}{3} x+b[/tex]
Now find the y-intercept. For this, insert the given coordinate points and the slope into the equation to solve for b:
[tex](-6_{x},-1_{y})\\\\-1=-\frac{2}{3} (-6)+b[/tex]
Simplify multiplication using the rule [tex]\frac{a}{b} *c=\frac{ac}{b}[/tex] :
[tex]-1=-\frac{2(-6)}{3} +b\\\\-1=-\frac{-12}{3} +b\\\\-1=\frac{12}{3} +b\\\\-1=4+b[/tex]
Use inverse operations to isolate the variable. Subtract 4 from both sides:
[tex]-1-4=4-4+b\\\\-5=b[/tex]
The y-intercept is -5. Insert:
[tex]y=-\frac{2}{3}x -5[/tex]
:Done
If E[5X - 10) = 60, what is E[X]?
Step-by-step explanation:
here,
1o
so X is equal to 10
Kinda new at this can someone teach me how to work this app?
Answer:
you scan Ur question at the homepage
Step-by-step explanation:
if there's one, it'll show up
and yea u know how to ask a question so I won't explain XD
Answer:
yeah of course!! first don’t be a catfish cause i saw your profile pic on google (:<
Step-by-step explanation:
Kyle missed 3 questions on the math exam. If he missed 15% of the questions, how many questions were on the exam all together?
Answer:
There were 20 questions on the test.
Hope this helps!
Sydney owns a small business selling used books. She knows that in the last week 125 customers paid cash, 5 customers used a debit card, and 9 customers used a credit card. Based on these results, express the probability that the next customer will pay with something other than cash as a decimal to the nearest hundredth.
Answer:
0.10
Step-by-step explanation:
rob bought 15 concert tickets worth $322.50. Floor tickets cost $25 each while balcony tickets cost $17.50 each. How many tickets of each type did rob bye?
Answer:
8 floor tickets and 7 balcony tickets.
Step-by-step explanation:
f+b=15
25f+17.50b=322.50
Answer:
8 floor tickets, 7 balcony tickets
Step-by-step explanation:
F + B = 15
25F + 17.50B = 322.50