pls help!
for which of the following does f(-3)=0 select all that apply
A. f(x) = (x - 3)^2
B. f(x) = -x^2 – 3x
C. f(x) = -(x + 3)^2
D. f(x) = x^2 + 5x + 4
E. f(x) = 2x - 3(x + 1)
F. f(x) = -2(x - 2) + 3x
The function which has the value of 0 at x = -3 are C. f(x) = (x + 3)² and E. f(x) = 2x - 3(x + 1).
What is Function?
A function is a relation from a set A to a set B where the elements in set A only maps to one and only one image in set B. No elements in set A has more than one image in set B.
A. f(x) = (x - 3)²
Substituting x = 3,
f(-3) = (-3 - 3)² = 36
B. f(x) = x² - 3x
f(-3) = (-3)² - (3 × -3) = 9 + 9 = 18
C. f(x) = (x + 3)²
f(-3) = (-3 + 3)² = 0
Here the function value is 0.
D. f(x) = x² + 5x + 4
f(-3) = 9 - 15 + 4 = -2
E. f(x) = 2x - 3(x + 1)
f(-3) = -6 - 3(-3 + 1) = 0
Here the function value is 0.
F. f(x) = -2(x - 2) + 3x
f(-3) = 1
Hence the required functions are C. f(x) = (x + 3)² and E. f(x) = 2x - 3(x + 1).
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X and Y together can do a piece of work in 10 days and X alone can do it in 15 days would Y alone can finish the work ?
Answer:
Y alone can do the piece of work in 30 days.
Step-by-step explanation:
Proportions
Let's make:
N = days for Y to finish the work alone
Since X alone can do it in 15 days, each day he can do a proportion of 1/15 of the piece of work.
Since Y alone can (possibly) do it in N days, each day he can do 1/N parts of the work.
Together, they do
[tex]\displaystyle \frac{1}{15}+\frac{1}{N}[/tex]
parts of the work per day. We know they can finish it in 10 days, thus:
[tex]\displaystyle \frac{1}{15}+\frac{1}{N}=\frac{1}{10}[/tex]
Rearranging:
[tex]\displaystyle \frac{1}{N}=\frac{1}{10}-\frac{1}{15}[/tex]
The LCM of 10 and 15 is 30, thus operating:
[tex]\displaystyle \frac{1}{N}=\frac{3-2}{30}=\frac{1}{30}[/tex]
Solving for N:
N = 30
Y alone can do the piece of work in 30 days.
HELP! (20 points) What is the area of a triangle?
Answer:
21 units
Step-by-step explanation:
You use the formula a=1/2 bh to get 21
B=6
H=7
7 times 6 is 42
42/2 is 21
Answer is 21
Find the value of each variable
Answer:
x = 17[tex]\sqrt{3}[/tex]
y = 17
Step-by-step explanation:
You would need to use the following trigonometric functions cosine and sin. Sin is used for the y-variable to get the answer and cosine is used for the x-variable to get the answer. For this case, you would need to do 34 sin 30 for y and 34 cos 30 for x. You should get 17 for y and 17 root 3 for x when you put it in the calculator.
The value of each variable are,
x = 17√3
y = 17
We have to give that,
A triangle is shown in the image.
Now, from the triangle we get;
cos 30° = x/34
Solve for x,
√3/2 = x/34
Cross multiply,
34√3 = 2 × x
2x = 34√3
x = 17√3
And, We get;
⇒ sin 30° = y/34
⇒ 1/2 = y/34
Cross multiply,
⇒ 34 = 2y
⇒ y = 17
Hence, the value of each variable is,
x = 17√3
y = 17
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PLZ HELP Which equation could have been used to create this table?
y = x + 6
y = x + 5
y = 6x
y = 7x
x y
1 6
2 12
4 24
5 30
8 48
Answer:
The answer is Y=6x
Step-by-step explanation:
i just took the text in k12
PLEASE HELP!!!! I WILL GIVE BRAINLIEST TO THE FIRST ANSWER!!!
Find each unknown number.
12 is 150% of what number?
5 is 50% of what number?
10%of what number is 300?
5% of what number is 72?
20 is 80% of what number?
Answer:
1. 8
2. 10
3. 3000
4. 1440
5. 25
please help me on this >_
Answer: x=74°
180-133=47 and 47+59=106 so 180-106= 74°
A trade school would like to measure the long-term success of its graduates after they leave the school, and emails a survey requesting information from graduates about their work experience. One question asks graduates if they are currently employed in the field they studied in school, while another asks them to share their annual salary. What type of bias is most likely to be present in the survey results?
This is response bias because some graduates may not provide accurate information.
This is question wording bias because many graduates may misunderstand the questions asked.
This is voluntary response bias because graduates may choose to be part of the sample.
This is nonresponse bias because many graduates may choose not to respond to the email survey.
Answer:c will be the answer YW!
Step-by-step explanation:
This is voluntary response bias because graduates may choose to be part of the sample that is most likely to be present in the survey results. Thus option C is correct.
What is a survey?A survey is a set of inquiries designed to elicit specified data from a certain population. Surveys can be carried out via the radio, by postal, online, at town squares, and even in shopping centers.
When elements are personality volunteers who are degree holders, volunteered response bias emerges. Voters determine whether or not they will participate in the sample once the research involved a group of people to do so.
Graduating students may select to be a part of the population that is the most likely to appear in the survey results, resulting in voluntary response bias. Therefore, option C is the correct option.
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Identify the linear coefficient of the product
(7x- 4) (3x + 11)
What is the ratio of Grade 7 to Grade 8 students on Team A. *
On Team A, of the students are in Grade 7, the rest are in Grade 8.
On Team B, of the students are in Grade 8, the rest are in Grade 7.
I can't answer this and I don't think anyone can, there is not enough information. (yet again I'm 12 so I can't say much)
Write the equation of the line IN SLOPE INTERCEPT FORM, that goes through (-2,4) and (-3,2)
How do you solve 5d+5-3D=2+5d+3 and what’s the answer?
Answer:5/-3
Step-by-step explanation:
5=-3d
help me out bruv it is due by the end
of week
Answer:
SSS
Step-by-step explanation:
BOTH THE TRIANGLES HAVETHE SAME MARKING ON EACH SIDE
THESE MARKING REPRESENT THE LENGTH OF THE SIDE
Answer:
SSS
Step-by-step explanation:
2) A big league pitching coach tries to limit his pitchers to 110
pitches per game. If the pitcher has already thrown 52
pitches, write and solve an inequality to find how many more
pitches he can throw before reaching the limit.
Answer:
x<58 the< with line under the pitcher can throw 58 or less pitches
Step-by-step explanation:
Use the Distributive Property to expand -3 (8x - 4).
Then solve the equation.
A copy center charges 40¢ for the first 3
copies and 7¢ for each additional copy.
How many copies can be made for 75¢?
Answer:
8
Step-by-step explanation:
Ok so 3 copies = 40 cents.
75 - 40 = 35.
We only have 35 cents left.
The highest number that can go in 35 with 7 is 5.
Oir original 3 copies + our 5 copies is 8
I did this in my head so sorry if I'm totally wrong.
Which is the difference of 25 1/8 -12 3/4
Answer:
12 3/8
Step-by-step explanation:
Answer:
Step-by-step explanation:
Dan had 20 people on his team, but only 12 showed up for the last game. What percent
showed up to play?
Answer:
8 people
Step-by-step explanation:
20 - 12 = 8
Addison made fancy orange costume decorations for each of the 9 dancers in her year-end dance performance. She cut 7 1/5 yards of ribbon into equal pieces to make the decorations. How long was each piece of ribbon?
Answer:
0.8 yards or 28.8 inches
Step-by-step explanation:
I always turn fractions into decimals because it is easier to figure it out and simpler.
So 1/5 would be 2/10 because you multiply the whole thing by 2 to make the denominator 10 so you can turn it into a decimal.
So the decimal is 0.2
You would divide 7.2 by 9 to get 0.8 yards which is 28.8 inches.
if the radius of a coin is 20cm ,find its surface area.
Answer:
It's surface area is 1257.14cm^2
Step-by-step explanation:
area=22/7×20cm×20cm
=3.14×20cm×20cm
=1257.14cm^2
anyone ?? i need helppp
What is the tangent ratio of angle x?
m=4; 4m - 2 brainly plz help me I need it for a project!!!!!
If the simple interest on $7,000 for 9 years is 3,780, then what is the interest rate?
Answer:
6%
Step-by-step explanation:
Interest = Principal × Rate × Time/100
$3780 = $7000(9)(rate)/100
63000rate = 378000
rate= 378000/63000
rate = 6% per annum (Answer)
Find the value of x. PLEASE HELP I GOT 13 MINS I’ll cashapp you comment cashtag when you find the answer
Answer:
x=5
Step-by-step explanation:
Complete the square 8-2x^2
Answer:
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
2
and
b
=
x
.
2
(
2
+
x
)
(
2
−
x
)
Step-by-step explanation:
Six friends will exchange books in their book club. Each friend has one book to give to a friend, and will receive one book from a different friend. (No two friends trade books with each other.) In how many ways can the books be exchanged
please help I'm in a rush, will give brainliest for a good answer!
Answer:
The value of x is 4.
Step-by-step explanation:
From the image uploaded, line BC is parallel to line AD and 15 is the mid-segment.
The mid-segment of a trapezoid is calculated as;
[tex]15 = \frac{|BC| \ + \ |AD|}{2} \\\\15 = \frac{2x \ + \ (3x\ +\ 10)}{2} \\\\15 = \frac{2x \ + \ 3x \ + \ 10}{2} \\\\15 = \frac{5x \ + \ 10}{2} \\\\5x \ + \ 10 = 2(15)\\\\5x \ + \ 10 = 30\\\\5x = 30 -10\\\\5x = 20\\\\x = \frac{20}{5} \\\\x = 4[/tex]
Thus, the value of x is 4.
Find c.
Round to the nearest tenth.
7 ft
с
320
8 ft
c = [?]ft
Law of Cosines: c2 = a2 + b2 - 2ab cos C
Answer:
4.2 ft
Step-by-step explanation:
Given the equation for the Law of Cosines, we can rewrite the equation to solve for "c" directly:
[tex]c^2=a^2+b^2-2ab(cosC)\\c=\sqrt{a^2+b^2-2ab(cosC)}\\c=\sqrt{7^2+8^2-2(7)(8)(cos32)}\\c=\sqrt{49+64-2(56)(cos32)}\\c=\sqrt{113-112(cos32)}\\c=\sqrt{113-94.98138677}\\c=\sqrt{18.01861323}\\c=4.244833711\\c=4.2[/tex]
So the length of c is approximately 4.2 ft
given the equation ax + b = 9x + 21 which set of values for a and b would result in an equation with infinity many solutions
a = 3,b = 7
a = 9, b = 9
a = 9, b = -21
a = 9, b = 21
Answer:
D. a = 9, b = 21Step-by-step explanation:
Given the equation
ax + b = 9x + 21For the equation to have infinitely many solutions, both sides of the equation should be same.
a = 9 and b = 21 will make both sides equalCorrect option is D