Answer:
Step-by-step explanation:
How many questions are on the exam? Represent this by n.
Then 40% of n comes out to 12 questions, or more symbolically,
0.40n = 12, after which we get n = 12/0.40 = 30
Answers:
(1) 0.40n = 12 is the desired equation.
(2) n = 30 is the number of questions on the exam.
(3) See above for explanations.
Select the correct answer.
Find the inverse of function f.
95 + 7
Answer:
D
Step-by-step explanation:
1. Make it into a y = x equation
y = 9x +7
2. change x to y and y to x
x = 9y + 7
3. Isolate y ( if not possible, use implicit differentiation but here you can)
x-7 = 9y
1/9x-7/9 = y
?
2
Find the arc length of the partial circle.
Either enter an exact answer in terms of it or use 3.14 for it and enter your answer
9514 1404 393
Answer:
3π units
Step-by-step explanation:
The full circumference of a circle with radius 2 is ...
C = 2πr
C = 2π(2) = 4π
The arc shown is 3/4 of the full circle circumference so is ...
3/4C = (3/4)(4π) = 3π . . . units
Hurry Brainliest!
Ice Cream Inc. is offering a 25% discount for teachers during the summer break. If the regular price of a large sundae is $7.50, how much will teachers spend on each sundae?
Answer:
To find the amount after the discount you have to multiply 7.5 by 0.75, Using a calculator would be faster but you can also do it by hand. The answer is 5.625
Step-by-step explanation:
To find the answer you need to do multiplication.
Use this form to do it more easily.
7.5
* 0.75
0.375
+ 5.25
then you add
5.625
Some for all values of x by factoring
Answer:
{-1, 10}
Step-by-step explanation:
Next time please share the entire set of instrutions.
x^2 - 9x - 15 = -5 should be rewritten in standard quadratic form:
x^2 - 9x - 10 = 0 = (x - 10)(x + 1) = 0.
Setting each factor equal to zero and then solving for x yields {-1, 10}
Answer:
{-1,10}
Step-by-step explanation:
[tex]x^2-9x-15=-5[/tex] given
[tex]x^2-9x-10=0[/tex] addition property of equality
[tex]x^2+(x-10x)-10=x^2+x-10x-10=0[/tex] x-10x = -9x
[tex]x(x+1)-10(x+1)=0[/tex] distributive property ( x( y + z ) = xy + xz
[tex](x-10)(x+1)=0[/tex] distributive property (backwards)
[tex]x-10=0;x=10;x+1=0;x=-1[/tex] at least one factor of 0 has to be 0
{-1,10}
Which equation is represented by the graph below?
help!!
Find the inequality represented by the graph
1-Step-by-step explanation:
X= [3 -5] Y= [6 7]
[-4 2]. [-4 -3] calculate X+Y
Answer: [tex]X+Y=\begin{pmatrix}9&2\\ -8&-1\end{pmatrix}[/tex]
Step-by-step explanation:
Given: [tex]X=\begin{pmatrix}3&-5\\ -4&2\end{pmatrix},\ \ Y=\begin{pmatrix}6&7\\ -4&-3\end{pmatrix}[/tex]
To calculate: [tex]X+Y[/tex]
Consider [tex]X+Y= \begin{pmatrix}3&-5\\ -4&2\end{pmatrix}+\begin{pmatrix}6&7\\ -4&-3\end{pmatrix}[/tex]
[tex]=\begin{pmatrix}3+6&\left(-5\right)+7\\ \left(-4\right)+\left(-4\right)&2+\left(-3\right)\end{pmatrix}\\\\=\begin{pmatrix}9&2\\ -8&-1\end{pmatrix}[/tex][[tex]\mathrm{Add\:the\:corresponding\: elements\: and\: simplify}[/tex]]
Hence, [tex]X+Y=\begin{pmatrix}9&2\\ -8&-1\end{pmatrix}[/tex]
ILL GIVE BRAINLIEST!!
Answer:
Step-by-step explanation:
using formula
=
=3[tex]\sqrt{3}[/tex]/2*6^2
=108[tex]\sqrt{3}[/tex]/2
=54[tex]\sqrt{3}[/tex]
=93.5
faktor sepunya terbesar bagi 24,36 dan 72
Answer:
Use a text book, so that you get the concept
Isaac saw a video game on sale for a 25% discount. The amount of discount is $4. What is the regular price of the video game
Answer:
The original price was $16
Step-by-step explanation:
$4= 25% of What price?
4= .25 x W
Divide both sides by .25
This leaves the equation as 16=W
Help ASAP thank you!
round to the nearst tenth
Answer:
Step-by-step explanation:
!HELP ASAP / GEOMETRY
15 POINTS
what is the side length?
Answer:
The length of the side would be 9
Step-by-step explanation:
You can just multiply from the smaller figure 7*3=21, 5*3=15, so then 3*3=9
Jason built a rectangular tool shed that is 8 meters wide and has an area of 96 square meters. What is the length of Jason’s tool shed?
Answer:
12 meters
Step-by-step explanation:
We can solve this problem simply by dividing area by the known width value (because length x width = area):
96/8 = 12
Find the value of x
I would like all 3 answers and how to get them (show work).
Thanks!
Answer:
4) 4
5) 6.5
6) 14
Step-by-step explanation:
Question 4 equation: [tex](\frac{12*5}{2} * 2) + (\frac{5x}{2} *2) = 80[/tex] ⇒ [tex]60 + 5x = 80[/tex] ⇒ [tex]5x = 20[/tex] ⇒ [tex]x=4[/tex].
Question 5 equation: [tex]16x=104[/tex] ⇒ [tex]x=6.5[/tex].
Question 6 equation: [tex]\frac{10x}{2} = 70[/tex] ⇒ [tex]5x=70[/tex] ⇒ [tex]x=14[/tex].
3) Whitten family has a party catered. They
leave a 20% tip on top of the $350 catering bill.
How much was the tip?
Answer: 70$
Step-by-step explanation: Hope this helps <3
Dan used 942 units of electricity from July to October
The meter reading in July was 32 347 units.
a)
Work out the meter reading in October.
b)
Each unit costs 14p.
How much do 942 units cost?
Answer:
13,188
Step-by-step explanation:
14 × 942
That will give you 13,188
Answer:
a) 33289
b) £131.88
Step-by-step explanation:
→ To find the meter reading add the July reading to the units used
32347 + 942 = 33289
→ Multiply the unit price by the units used
0.14 × 942 = 131.88
Find the measure of arc AB. 
Answer:
AB = 3π units
Step-by-step explanation:
The arc length is calculated as
AB = circumference of circle × fraction of circle
= 2πr × [tex]\frac{45}{360}[/tex]
= 2π × 12 × [tex]\frac{1}{8}[/tex]
= 24π × [tex]\frac{1}{8}[/tex]
= 3π units
the ratio of men to women working for a company is 4 to 7 if there are 231 employees total how many women work for the company.
Answer:
297
Step-by-step explanation:
Please help me with my work
Discriminat of 3x^2+15x-6=0
Solution
=−5±33√2
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After its Saturday competition, a swim team ordered three orders of pizza rolls and five orders of fried pickles for a total cost of $22. After its Tuesday night competition, the team ordered six orders of pizza rolls and two orders of fried pickles for a total cost of $28. what is the price of each appetizer? show your work.
Please help
Answer:
pizza rolls = $4
fried pickles = $2
Step-by-step explanation:
3 x 4 = 12
5 x 2 = 10
John went shopping for a pair of jeans.
The whole store was 40% off. If the
jeans John picked out were originally
$70, how much would the jeans cost with
The discount?
Answer:
it should be 42 hope it helps
Step-by-step explanation:
Classify the triangle with side lengths of 5, 6, 7
Answer:
Scalene triangle
Step-by-step explanation:
The sides of the triangle is ,
5 , 6 , 7Since the sides are unequal . Hence it is a scalene triangle .
Hence the ∆ is scalene triangle .how much simple interest is accumulated if you deposit $100 in the bank at 5% interest for 15 years
Answer:
You will make 75 dollars.
Step-by-step explanation:
5% of 100 is 5. Multiply 5 by 15 to get 75.
There are 20 people in a room, If they all shake each other's hands once and only once, HOW MANY handshakes are there altogether?
Max surveyed 100 of the 200 7th graders that attend his school to help determine new lunch choices in the lunch room. He has come up with these findings.
Which statement is supported by the information in his graphs?
A
It can be inferred that on the days that students are offered pizza and salad, 70% of students are pleased with the offerings.
B
It can be inferred that about the same number of students get a salad as the number of students that like cheeseburgers and tacos combined.
C
It can be inferred that pizza and chicken nuggets should be the only meals offered in the cafeteria to please the most students each day.
D
It can be inferred that if the lunchroom offered cheeseburgers and tacos on the same day, every student would get a tray that day.
Answer:
i think it's c id
Step-by-step explanation:
The statement that is supported by the information in his graphs is C. It can be inferred that pizza and chicken nuggets should be the only meals offered in the cafeteria to please the most students each day.
What is a Supporting Detail?This refers to the use of evidence to support a claim based on available data to show its validity.
Hence, we can see that from the information in the graphs, we can see that 50% of students prefer using trays and they represent half of the students from the students that prefer trays, they prefer to eat pizza and chicken nuggets and option C is the correct answer.
Read more about supporting details here:
https://brainly.com/question/884525
#SPJ2
The inverse of y = e^x
Please help me asap!
Answer:
Let's analyze the example first:
We have:
3, 4, 6 target 42 answer: (3 + 4)*6
If we solve the equation, we get:
(3 + 4)*6 = 7*6 = 42
So, we need to reorder the first 3 numbers in an expression, such that the solution of the expression is the target number.
a) 2, 5, 6 Target 40
We know that 5*8 = 40
and that 2 + 6 = 8
Then the answer is:
(2 + 6)*5
b) 3, 4, 6 target 12
Here we know that 4*3 = 12
and 6 - 3 = 3
Then the answer is:
(6 - 3)*4
c) 4, 6, 10 target 1.
We know that the quotient of two equal numbers is 1.
And 4 + 6 = 10
Then the answer here is:
(4 + 6)/10
d) 3, 5, 6 target 21
We know that 3*5 = 15
And 15 + 6 = 21
Then the answer here is:
3*5 + 6
e) 2, 7, 10 target 6.
Here is a harder one.
We know that 2*3 = 6
And that 10 - 7 = 3
Then the answer ere is:
2*(10 - 7)
f) 3, 6, 15 target 3
Here we can use:
(15 - 6) = 9
And 9/3 = 3
Then the answer is:
(15 - 6)/3
Helpelelelepelelelelelelellel
Answer:
0.83 cents
Step-by-step explanation:
$25.35 + $2.99 = $28.34
$30 - $28.34 = $1.66
1.66 ÷ 2 = 0.88
Brainliest