Answer:
(a) 3t + 15
3(t + 5)
(b) 3a² + 9a
3a(a+3)
(c) a²b + ab² + ab
ab(a +b + 1)
(d) x² - 25
x(x-25)
(e) I'm not sure about this one, sorry
Lucy's parents built a swimming pool in the backyard. Use 3.14 for .
40 ft
20 ft
What is the distance around the pool? The distance around the pool is 131.47 feet.
What is the area of the pool?
Can someone please help
Area = l x w = 40 x 20
= 800 sq ft.
Consider the following linear system.
Answer:
k= 10
Step-by-step explanation:
2x - 5y = 15
ky = 20 +4x
Solve the first equation for y
-5y = -2x +15
Multiply by -2
10y = 4x - 30
If k = 10 then the slopes are the same, but the y intercepts are different.
The lines are parallel. They will never intersect, and they have no solution
Answer:
D
Step-by-step explanation:
- 5y = - 2x +15
10y = 4x - 30
if k = 10, then the y intercepts are different, and the lines--being parallel--don't ever meet, so k = 10 would result in 0 solutions.
Hope this helps!
Rewrite this expression using fewer terms.
3(x - 2) + 4(x - 2) – 5(x - 2)
Answer:
2x−4
Step-by-step explanation:
Simplify.
Distribute:
=(3)(x)+(3)(−2)+(4)(x)+(4)(−2)+(−5)(x)+(−5)(−2)
=3x+−6+4x+−8+−5x+10
Combine Like Terms:
=3x+−6+4x+−8+−5x+10
=(3x+4x+−5x)+(−6+−8+10)
=2x+−4
Cheers! :)
PS: I got a question worth 30 POINTS ANYONE WANT TO ANSWER?
Hey!!
Solution,
3(x-2)+4(x-2)-5(x-2)
= 3x-6+4x-8-5x+10
= 3x+4x-5x-6-8+10
= 7x-5x-14+10
= 2x-4
=2(x-2)
hope it helps..
Does anyone know the answer?
[tex]value \: of \: x \: is \: 210 \\please \: see \: the \: attached \: picture \\ for \: full \: solution \\ hope \: it \: helps[/tex]
Answer:
[tex]210 \: \: \: degrees[/tex]
Step-by-step explanation:
Two equilateral triangles and a square are join together.
So, in a equilateral triangle all the angles are equal. which means an angle measures 60 degrees.
Also in a square all the angles are equal . it measures 90 degrees.
x = two triangle = 60 +60
square = 90
[tex]60 + 60 + 90 \\ = 210[/tex]
hope this helps you.
brainliest appreciated
good luck! have a nice day!
Can someone please help
Help!
MJ Supply distributes bags of dog food to pet stores. Its markup rate is 28%. Which equation represents the new price of a bag, y, given an original price, p? Select all that apply. *
A) y = 0.72p
B) y = p + 0.72p
C) y = 1.28p
D) y = p + .28p
E) y=1.28p
F) y = 1 + .28p
Answer: it’s C.
Step-by-step explanation:
The equation that represents the new price of a bag is y = 1.28p.
Markup rate is the ratio of the difference between the selling price and cost price to the cost price. It is given by:
Markup rate = (selling price - cost price)/cost price
Given that y is the selling price, p is the cost price and the markup rate is 28%, hence:
28% = (y- p)/p
y-p = 0.28p
y = 1.28p
Hence the equation that represents the new price of a bag is y = 1.28p.
Find out more at: https://brainly.com/question/23106860
some teachers traveled to school by car the table shows the number of teachers in the cars a) what was the modal number of teachers in a car b) what was the median number of teachers in a car c) what was the mean number of teachers in a car
Answer:
Step-by-step explanation:
since it is asking for the modal that means the most so it would be 3 teachers, and when asking the median we have to change the order so it would be 2,3,4,6 and we find the middle so it would be 3.5, and the mean is the total of the numbers divided by how many numbers there are so it would 2+6+4+3=
15/10 = 1.5
A mean is an arithmetic average of a set of observations. The model number, median, and mean of the number of teachers in a car are 3, 3, and 2.46667, respectively.
What is Mean?A mean is an arithmetic average of a set of observations. it is given by the formula,
Mean = (Sum of observations)/Number of observations
The given table can be written in the data form as 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4.
A.) The modal number is the mode of a given data set. Therefore, the mode of the given data set is 3.
B.) The median is the middle number of a given data set. Therefore, the median is 3.
C.) The mean is the average number of teachers in a car. Therefore, the mean is,
Mean = (1+1+1+2+2+2+2+3+3+3+3+3+3+4+4)/15 = 37/15 = 2.46667
Hence, the model number, median and the mean of the number of teachers in a car is 3, 3, and 2.46667, respectively.
Learn more about Mean:
https://brainly.com/question/16967035
#SPJ2
A measure of the average value of a population is called
Answer:
the census
Step-by-step explanation:
this is when info about every member of population is collected
X-11 < 36
Answer here
Answer: x< 57
Step-by-step explanation:
x -11 < 36 Add 11 to both sides.
+11 +11
x < 47
A parabola has a vertex at (-1,0) and opens down. What is the equation of the parabola?
Answer:
y = - (x + 1)²
Step-by-step explanation:
Vertex form of a parabola is given by,
y = -(x - h)² + k
Where (h, k) is the ordered pair representing vertex.
(-) sign denotes that the parabola is opening downwards.
If the coordinates of the given parabola is (-1, 0)
Equation of the parabola will be,
y = - (x + 1)² + 0
y = - (x + 1)²
Therefore, equation of the parabola will be, y = - (x + 1)²
Which phrase best describes the figure?
A- concave nonagon
B- convex octagon
C- convex nonagon
D- concave octagon
Answer:
Hi there!
The correct answer is: B. Convex Octagon
Step-by-step explanation:
The figure first classifies as an octagon because it has 8 sides.
Next you can tell whether or not it is concave or convex by remembering: concave has a "cave" in it.
Concave or Convex
A convex octagon has no angles pointing inwards. More precisely, no internal angles can be more than 180°. When any internal angle is greater than 180° it is concave.
The given figure is convex octagon. Therefore, option B is the correct answer.
What is octagon?An octagon can be defined as a polygon with eight sides, eight interior angles, and eight vertices. When all the sides and angles of an octagon are equal in measurement, it is called a regular octagon.
Every polygon is either convex or concave. Convex octagons bulge outwards, whereas concave octagons have indentations (a deep recess). Convex octagons are those in which all the angles point outwards. A regular octagon is an example of a convex octagon. The octagon in which at least one of its angles points inwards is a concave octagon.
In the given figure, there are 8 sides and 8 angles.
Therefore, option B is the correct answer.
Learn more about the octagon here:
https://brainly.com/question/16543440.
#SPJ7
Kennedy can type 150 words in 2 minutes. How many words per minute can Kennedy type?
words per minute
Answer:
75
Step-by-step explanation:
Answer:
75wpm
Step-by-step explanation:
150 ÷ 2 = 75
75 wpm
If a patient needs 30 days supply of tablet two tablets four times a day how many tablets with a patient need for discharge
Answer:
Total number of tablets needs to discharge = 240 tables
Step-by-step explanation:
Given:
Number of days tablet need = 30 days
Number of times per days need = 4 times
Number of tablet per time = 2 tablet
Find:
Total number of tablets needs to discharge = ?
Computation:
⇒ Total number of tablets needs to discharge = Number of days tablet need × Number of times per days need × Number of tablet per time
⇒ Total number of tablets needs to discharge = 30 × 4 × 2
⇒ Total number of tablets needs to discharge = 240 tables
Ari's teacher says he may have his report grade based on either the mean or the median of his last six test scores
88%, 73%, 97%, 76%, 90%, 80%
Which measure of center would best represent Ari's grade?
Answer:
The mean
Step-by-step explanation:
Answer:
the answer is option a) the mean
Step-by-step explanation:
Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values. Then calculate it again, letting Row 2 represent the x-values and
Row 1 the y-values. What effect does switching the variables have on?
Row 1
20
21
37
48
56
Row 2
63
72
177
158
164
171
129
186
Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values.
= 206 (Round to three decimal places as needed.)
134
Calculate the correlation coefficient r, letting Row 2 represent the x-values and Row 1 the y-values.
- (Round to three decimal places as needed.)
Answer:
A.) r = -0.3669
B.) r = -0.3669
C.) there is no change in the value of r
Step-by-step explanation:
Row 1 : 20, 21, 37, 48, 56, 63, 72
Row 2: 177, 158, 164, 171, 129, 186, 134
A.) Taking Row 1 values as X. And row 2 values as Y.
Regression equation using the correlation Coefficient calculator :
r = -0.3669
B) Taking Row 1 values as Y. And row 2 values as Y.
Regression equation using the correlation Coefficient calculator :
r = -0.3669
C.) the correlation does not change.
Max climbs a hiking trail at a constant rate of 18 meters in 15 minutes. The line y = mx can be used to model Max's climb, where y is the distance he climbs and x is the time in minutes. Which is the slope of the line, m?
Answer:
18y=15mx/m
Step-by-step explanation:
that's the set up
Please please, I need help with this question ASAP.....
We want to compare averages. From the histogram we have we don't know the exact mean, but if we just assume the average in each bin is the midpoint of the bin we can make an estimate.
Supplier A has
mean = ( 22(64) + 27(66) + 26(68) + 15(70) + 10(72) )/(22+27+26+15+10)
mean = 6728/100 = 67.28 grams
Supplier B has mean 66.5
Answer: Choose Supplier A
(work shown above)
please help me with 4 more questions ill give brainliest plesase!!
Answer:
(- 1, - 1 )
Step-by-step explanation:
Since the dilatation is centred at the origin, then multiply the coordinates of the original point by the scale factor, that is
(- 3, - 3 ) → ([tex]\frac{1}{3}[/tex] × - 3, [tex]\frac{1}{3}[/tex] × - 3 ) → (- 1, - 1 )
Please !!!!!! Help me
Answer:
a. 1 b. 3/5 or 60%
Step-by-step explanation:
number of favourable events/number of total events
3x/5x = 3/5
please help asap. I will award
Answer:
12
Step-by-step explanation:
hope this helps! :)
do complementary angles form straight angles?
What is the answer of 135=-9x+9?
Answer:
x=-14
Step-by-step explanation:
move all the terms that don't contain x to the right side and solve.
(idk if this is correct but i hope it helps)
Answer:
Please mark me brainliest and I hope this helped!
X = -14
Step-by-step explanation:
First, we want to isolate the variable. So we subtract 9 from both sides and that gives us 126= -9. Now we divide both sides by -9. That gives us -14=x. So the answer is:
x = -14
WILL GIVE BRAINLIEST AND 30 POINTS! Simplify −3 + i 7 + i . First, multiply both the numerator and denominator by . The product in the numerator is + i. The product in the denominator is
Answer:
-2 + i
------------
5
Step-by-step explanation:
(-3+i)/ (7+i)
Multiply by the complex conjugate
(-3+i)/ (7+i) * (7-i)/(7-i)
Numerator
(-3+i)(7-i) = -21 +7i +3i -i^2 = -21 +10 i - (-1) = -21 +10i +1 =-20+10i
Denominator
(7+i)(7-i) = 49 +7i-7i - i^2 = 49 - (-1) = 49+1=50
Numerator over denominator
-20 + 10i
-----------
50
Divide by 10
-2 + i
------------
5
Answer:
(-2 + i) / 5Step-by-step explanation:
(-3 + i)/(7 + i)= (-3 + i)(7 - i) / (7 + i)(7 - i)= (-21 + 3i + 7i - i²) / (49 - i²)= (-21 + 1 + 10i) / (49 + 1) =(- 20 + 10i) / 50 =(-2 + i) / 5First, multiply both the numerator and denominator by = 7 - i
The product in the numerator is
- 2 + iThe product in the denominator is
5What would be the cost for 5 of the gift cards?
Answer:100 is the answer
Step-by-step explanation: your going up 20 every dot my G
Answer:
$100
Step-by-step explanation:
Which figure has a greater volume and by how much?
3 cm
3 cm
5 cm
5 cm
8 cm
6 cm
15 cm
15 cm
Figure 1
Figure 2
The volume of figure 1 is 45 cm greater than the volume of figure 2.
The volume of figure 2 is 45 cm greater than the volume of figure 1.
The volume of fioure 1 is 10mg areater than the volume of figure 2
Answer:
Step-by-step explanation:
The volume of figure 1 is 45 cm greater than the volume of figure 2.
The volume of figure 2 is 45 cm greater than the volume of figure 1.
The volume of fioure 1 is 10mg areater than the volume of figure 2
Katie sewed costumes for the high school's annual play. She spent the following number of hours on each dress. What is the mean number of hours spent on each dress? 5 1/4 4 1/2 3 3/4 4
Answer:
round down to 2.9 if to 1dp
Step-by-step explanation:
this table shows values that represent an exponential function.what is the average rate of change for this function for the interval from x=1 to x=3
Answer: -4
Step-by-step explanation:
It takes 93 pounds of seed to completely plant a 10-acre field. How many acres can be planted per pound of seed?
Answer:
It takes 9.3 acres to plant per pound of seed.
Step-by-step explanation:
[tex]93 \div 10[/tex]
[tex]9.3[/tex]
Vlad tried to solve an equation step by step.
Find Vlad's Mistake.
Answer:
I think that it’s correct
Step-by-step explanation:
Answer:
Vlad did not make a mistake
Step-by-step explanation:
Khan academy 7th grade inequalities quiz 2 and unit test
Find the measurement of the inscribed angle CDB indicated below
Answer:
∠ CDB = 45°
Step-by-step explanation:
The measure of an inscribed angle is half the measure of its intercepted arc.
∠ CDB = 0.5 × BC = 0.5 × 90° = 45°
