f(x) is concave down on an interval I if all of the tangents to the curve on I are above the graph of f(x)
Paula has $54. She bought some pencils, each costing $0.75, and a paper ream for $2.50. She is left with $42.50 after buying pencils and the ream of paper. She uses the equation Syntax error from line 1 column 49 to line 1 column 73. Unexpected 'mathsize'. to find the number of pencils she bought. How many pencils did Paula buy?
Answer:
12 pencils
Step-by-step explanation:
let no. of pencils bought be x.
54 - 0.75x - 2.50 = 42.50
9 = 0.75x
x = 12
Topic: algebraic equations
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Solve for the missing angles and side lengths A= 20 degrees, b=4 a = 4.5 Find the measure of C
a )18 degrees
b)142 degrees
c)160 degrees с
Answer:
Its 142
Step-by-step explanation:
Theres a website called triangle calculator and you put in three things wether its SSA or ASA or whatever and it gives you all the measurements. Good luck on your quizzes and tests :)
Mia uses of a bag of soil in the morning and of a bag in the afternoon
About how much soll does she use in one day?
Answer: 2 bags of soil
Step-by-step explanation:
Write the equation of the line in slope-intercept form.
Answer:
The line intercepts at 0,1 and 0.5,0
Step-by-step explanation:
A building with a height of 6 m casts a shadow that is 8 m long while a taller building casts a 24 m long shadow. What is the height of the taller building?
Answer:
I am pretty sure it is 22m
Step-by-step explanation:
minus 2
A circle has radius 40 cm. Which of these is closest to its area, in square centimeters?
Answer:
251 cm2
Step-by-step explanation:
The area of the circle whose radius is 40 cm is 5026 cm².
What is a circle?A circle is a curve sketched out by a point moving in a plane so that its distance from a given point is constant; alternatively, it is the shape formed by all points in a plane that are at a set distance from a given point, the centre.
Given that the radius of the circle is 40cm. Therefore, the area of the circle will be,
Area of the circle = π × Radius²
= π× (40cm)²
= 1600π cm²
= 5026.54 cm²≈ 5026 cm²
Hence, the area of the circle is 5026 cm².
Learn more about Circle here:
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(Grade6math) Can somebody plz help answer all of these in simplify form (if u know how to) thanks so much :)
WILLL MARK BRAINLIEST
Need help anyone know
Answer:
40
Step-by-step explanation:
b and the angle next to the 140 degree angle are congruent, and thus they are supplementary to 140
180-140=40
1 If x = 6, which inequality is true? A 5 - 3x > 10 B 3 - 5x 13 D 5 - x < -3
Answer:
sorry what do you write for B???
3-5x?? 13
HELP PLEASE!! Multiply.
(2x−7)(x+4)
Enter your answer in the box.
Answer:
2[tex]x^{2}[/tex]+x-28
Step-by-step explanation:
To solve binomial multiplication problems you can use the FOIL method. FOIL means first, outside, inside, last, which tells you what order to multiply the terms.
Multiply the first terms,
(2x-7)(x+4)
2[tex]x^{2}[/tex]
Then the outside terms,
(2x−7)(x+4)
8x
Next the inside terms,
(2x−7)(x+4)
-7x
Finally the last terms,
(2x−7)(x+4)
-28
To find the answer put all of the products together and simplify
2[tex]x^{2}[/tex]+8x-7x-28
2[tex]x^{2}[/tex]+x-28
ill mark brainliest if you are correct
Answer:
$24/3shirts = c/7 shirts c=56
Step-by-step explanation:
Answer:
56
Step-by-step explanation:
7th GRADE MATH hellp
Answer:
I took 5 minutes to think this through, hope I'm right cause been a long time since my brain killed me over this one question. I believe the answer to this is B, cause the students might of gotten two chances to get picked so I'll stick with B. So sorry if I'm wrong. 3 students 2 chances... yea it's B.
Step-by-step explanation:
find the ragio p:r if p:a=1:2, a:b=2:3, b:c=5:1, c:r=3:2
Answer:
p : r = 5 : 2
Step-by-step explanation:
Expressing the ratios in fractional form, then
[tex]\frac{p}{r}[/tex] = [tex]\frac{p}{a}[/tex] × [tex]\frac{a}{b}[/tex] × [tex]\frac{b}{c}[/tex] × [tex]\frac{c}{r}[/tex]
= [tex]\frac{1}{2}[/tex] × [tex]\frac{2}{3}[/tex] × [tex]\frac{5}{1}[/tex] × [tex]\frac{3}{2}[/tex]
= [tex]\frac{30}{12}[/tex]
= [tex]\frac{5}{2}[/tex]
Thus ratio p : r = 5 : 2
p = 240 – 172
g=
9 x 8/-24
Work out the value of p×q
Step-by-step explanation:
I hope I got it right and I hope this helps
A cyclist starts a journey from town A. He rides 10km north then 5km east and finally 10 km on a bearing of M45°E
Answer:
75 km
Step-by-step explanation:
Can someone help me pls
Can somebody help me plz and thank you
Answer:
sure, what do you need help with?
Step-by-step explanation:
The graph below represents the price of sending picture messages using the services of a phone company. What is the constant of proportionality?
A graph is shown. The values on the x axis are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The values on the y axis are 0, 22, 44, 66, 88, 110, 132, 154, 176, 198, 220. Points are shown on ordered pairs 0, 0 and 2, 44 and 4, 88 and 6, 132 and 8, 176. These points are connected by a line. The label on the x axis is Picture Messages Sent. The label on the y axis is Price in cents.
10
11
21
22
Answer:
the answer is 22
Step-by-step explanation:
i took the test
Answer:
22
Step-by-step explanation:
How do you determine if a table or mapping is a function?
A. Every output has exactly one input
B. Every input has exactly one output
C. The y-intercept is 0
D. The slope is 0
please help
Answer:
B
Step-by-step explanation:
Every input has exactly one output
A rotating sprinkler that sprays water at a radius of 7 feet is used to water a lawn. Determine the area of the lawn that is being watered. Use 3.14 for pi. Round to the nearest tenth.
Answer:
49Pi
Step-by-step explanation:
Area of a circle is = to pi(r)^2
Put the fractions in order from smallest to largest:
3/4
1/3
5/8
Answer:
1/3
5/8
3/4
Step-by-step explanation:
X^2+36
How to solve this with factoring?
Answer:
not factorable
Step-by-step explanation
Can someone please help me with this question?
Answer:
PQ = 9.4
Step-by-step explanation:
to solve for PQ, use the distance formula
d = [tex]\sqrt{(x2-x1)^{2} + (y2-y1)^{2} }[/tex]
use two points
(x1,y1) = (4,3)
(x2,y2) = (-4,-2); and substitute into distance formula
d = PQ = [tex]\sqrt{(4+4)^{2} + (3+2)^{2} }[/tex] = [tex]\sqrt{8^{2} +5^{2} }[/tex] = [tex]\sqrt{64+25}[/tex] = [tex]\sqrt{89}[/tex] = 9.4
CAN ANYONE DO IT. PLZ
Answer:
70°Step-by-step explanation:
see image below
Answer:
10 is your answer.
Step-by-step explanation:
pls give me brainlest
i need to get this done
Answer:
x = 17 and y = 8
Step-by-step explanation:
Since (6x + 3) and (8x - 31) are alternate interior angles, they are congruent.
Therefore, you can set them equal to each other and solve for x.
8x - 31 = 6x + 3
Combine like terms
2x = 34
Divide both sides by two
x = 17
Since (5y + 35) and (6x + 3) are consecutive interior angles, they add up to 180. Plug in 17 for x.
(5y + 35) + (6(17) + 3) = 180
Add like terms
5y + 140 = 180
5y = 40
y = 8
Which graph shows a dilation?
The second graph is the only option that has equal increment by a common factor and it is the only graph that shows dilation.
A dilation in graph is also known as transformation.
In the process of transformation or dilation in graph, all distances on the coordinate plane are increased by a common factor. It usually involves multiplying either all x-coordinates or all y-coordinates by a common factor greater than one.The increased x-coordinates is known as horizontal dilation and the increased y-coordinate is known as vertical dilation.
The second graph is the only option that has equal increment by a common factor. Thus, the second graph shows dilation.
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A convenience store sells 1/3 pound of one brand of trail mix for $1.50 and 1/2 $2.15. Witch brand has lower price per pound?
Answer:
1/2 pound brand has a lower price
Step-by-step explanation:
convert both to having 6 for denominator
2/6 and 3/6 if you buy a whole pound the 1/3 is going to cost $4.50 and the 1/2 is going to cost $4.30
A civics teacher asked her students to indicate whether they believed each of two headlines. One headline was false and the other was true, but the students did not know this. The probability that a student selected at random believed the true headline was 90\%90%90, percent and the probability that the student believed the false headline was 82\%82%82, percent. She found that 75\%75%75, percent of the students believed both headlines.
Answer:
The events are not mutually exclusive.
Step-by-step explanation:
To determine that in the sample, are the events "believed the false headline" and "believed the true headline" mutually exclusive.
For two events, let say E₁ and E₂ are said to be mutually exclusive if they cannot both occur simultaneously. In set-theoretical notation, we can say that the two sets E₁ and E₂ are disjoint. i.e. E₁ ∩ E₂ = ∅ and the probability of them occurring at the same time is zero. i.e. Pr( E₁ ∩ E₂ ) = 0
So, we can say;
Let P(true) = E₁
P(false) = E₂
Thus; statistically:
Pr( E₁ ∩ E₂ ) = Pr(E₁) + Pr(E₂) - P( E₁ ∪ E₂ )
So;
the probability of students that believed the true headline P(E₁) = 0.90
the probability of students that believed the false headline P(E₁) = 0.82
the probability of students that believed both P( E₁ ∪ E₂ ) = 0.75
∴
Pr( E₁ ∩ E₂ ) = 0.90 + 0.82 - 0.75
Pr( E₁ ∩ E₂ ) = 0.97
Thus, the events are not mutually exclusive.
what does a postive plus a postive equal
Answer:
A Positive Sum
Step-by-step explanation:
Positive addends will always have a positive sum. There will not be adequate value for the sum to be negative.
Examples:
43 + 5 = 48
100, 424 + 532 = 100,956
Hope this helps.
Amir needs to use how many ?
tablespoons of olive oil.
Answer:
Step-by-step explanation:
^^lol can u post the question wait a min i took this it’s 32 tablespoons
