Answer:
x = - 7, x = 3
Step-by-step explanation:
To find the x- intercepts let f(x) = 0 , that is
x² + 4x - 21 = 0
Consider the factors of - 21 which sum to give the coefficient of the x- term (+ 4)
The factors are + 7 and - 3, since
7 × - 3 = - 21 and 7 - 3 = + 4, then
x² + 4x - 21 = 0
(x + 7)(x - 3) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 7 = 0 ⇒ x = - 7
x - 3 = 0 ⇒ x = 3
Solve for f.
0.3 = 0.5 f - 0.7
Answer:
0.3 = 0.5 f - 0.7
+ 0.7 + 0.7
_______________
1 = 0.5 f
_________
0.5 0.5
2 = f ( f = 2 )
f = 2 or 2 = f
Help! I need help asap
Answer:
3 looks right but I am not so sure
Step-by-step explanation:
sorry if i am wring
A book is marked down by 28 percent from an original price of $19.50. What is the new price?
Step-by-step explanation:
First find 28% of $19.50:
($19.50) / (100) × (28) = $5.46
Now minus the 285 from the original price:
($19.50) - ($5.46) = $14.04
The answer is $14.04
Hope it helped :)
Please do this it’s on my test and I’m already late I can’t figure it out and I’m struggling so much please help me on this I need it badly
In order to solve how many problems each person has solved, you have to multiply the fraction by the number of problems on their assignment. To do this, you multiply the numberator by the number of problems and then divide that by the denominator for both Dustin and Kelsey.
For Dustin, 3/8 * 24 = 72 / 8 = 9 problems completed
For Kelsey, 4/15 * 30 = 120/15 = 8 problems completed
Dustin has completed more problems
Answer:9
Step-by-step explanation:
Dustin done more he done 9 and kelsey done 8
A store bought a pair of shoes for $50, and sold it for $80. What percentage was the markup?
Answer: The required markup percentage is 60%.
Step-by-step explanation: Given that the store bought a pair of shoes for $50 and sold it for $80.
We are to find the markup percentage.
The markup price of the pair of shoes is given by
Therefore, the markup percentage is given by
Sorry if i was wrong. But this soulution makes since so i think im right! Also please brainlest!
10) A game went on sale from $16.00 to $13.00. What is the percent of
change?
a) 18.13% increase
b) 18.75% decrease
c) 22.3% increase
d) 23.1 % decrease
Answer:
The answer is b) 18.75% decrease
Algebra I Semester 1 Escam (SMS 20-21) 5 of 28
Which description best describes the function below?
I
11
5
1
2
4
-7
A The function is increasing.
B. The function's slope is -2.
C. The x-intercept of the function is (5,0).
D. The y-intercept of the function is (0,5).
during the first 60 seconds of a rocket launch after takeoff, a rocket traveled 208 kilometers in 50 minutes at a constant rate. suppose a penny is dropped from a skyscraper and could travel 153 kilomaters in 1/2 hours at a constant rate. which of these objects has a faster unit rate per hour?
The unit rate of the penny dropped is faster than the rocket.
How to find unit rate?Unit rate is the ratio of two different units, with denominator as 1.
Therefore, rocket travelled 208 kilometres in 50 minutes at a constant rate and the penny dropped from a skyscraper could travel 153 kilometres in 1/2 hours at a constant rate.
The object that has the faster rate between the two can be found as follows:
50 minutes = 0.833333 hours
Rate of the rocket = 208 / 0.833333
Rate of the rocket = 249.60009984
Rate of the rocket = 249.60 km/hr
Rate of the penny dropped = 153 / 0.5
Rate of the penny dropped = 306 km/hr
Rate of the penny dropped = 306 km / hr
Therefore, the unit rate of the penny dropped is faster than the rocket.
learn more on rate here: https://brainly.com/question/28246731
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If shan buy 3 packs of pop for $12.57 how much is each pop for
Answer:
The answer is 4.19
Step-by-step explanation:
12.57 divided by 3 = 4.19
Hope this helps!! :)
Answer:
$4.19 for each pop hoped this helped!
Step-by-step explanation:
Mark me as brainliest!
HELPPPPPPP ME PLEASEEEEEEEEEE ILL GIVE BRAINLEST
Answer:
The answer is 7
Step-by-step explanation:
The time is 0 because it wants the depth before the snow melts. -0.5 times 0 is zero plus seven is seven.
Billie Elilish , who's/whose had several hit songs recently ,is one of my favorite singers
Answer: same.
Step-by-step explanation:
Answer:
same
Step-by-step explanation:
same
The cost of tea varies directly with the
mass. Liz bought 4.5 kg of tea for $10.35.
What is the constant of variation?
Answer: $27.6 is the constant of variation.
I hope this helped!
soy ell idredle a admana gua uag uga jjejeje
is this right yes or no?
Answer:
As far as I can see, yes it is correct.
"The straight line of depreciation for a luxury car is modeled by the following equation:
y=-2,100x + 81,600
What is the original price of the car?"
A) $-2,100
B) $2,100
C) $81,600
D)$79,500
Classify this value -12 and give and explanation.
A. Rational
B. Irrational
C. Whole
D. Integers
Answer:
-12 is rational & an interger
Step-by-step explanation:
negative number are intergers
rational number can be made into fractions:
hence -12/1 is a fraction its rational
Whoever answers correctly will get Brainliest!
Answer:
B
Step-by-step explanation:
Which undefined term is used to define an angle?
line
plane
point
ray
what is 1/3 of 1/9????????????
Answer:
God is better then satan
Answer: 3
Step-by-step explanation: 9/3 is 3
6 (4x6) x 9 (5x9) judjsjdjdjddjdnnddnfndndndndndndndndn
Answer:
48 600
Step-by-step explanation:
6(4×6) × 9(5×9)
Solve the numbers in brackets first
6(20) × 9(45)= 120 × 405
= 4 8 600
Answer:
6(20) × 9(45)= 120 × 405
= 4 8 600
Mr. John has $800 to be shared in the ratio of 5:3 what amount would each receive
Answer:
500:300
Step-by-step explanation:
first add the ratios 5+3=8
then divide by 800
800÷8=100
now,
it's 500:300 .
hope I helped!
Answer: 500 : 300 because here Step-by-step explanation: Ratio Division Formula Rr = Rn × M : Rd × M Ratio Division Values Rn = 5 Ratio Numerator Rd = 3 Ratio Denominator Rs = Rn + Rd Rs = 5 + 3 Rs = 8 Ratio Sum a = 800 Amount to Divide M = a ÷ Rs M = 800 ÷ 8 M = 100 Multiplier Ratio Division Calculation Rr = Rn × M : Rd × M Rr = 5 × 100 : 3 × 100 Rr = 500 : 300
An employee receives a 6% raise each year. His salary this year is $25,000. Which two expressions will calculate his salary for next year?
Answer:
25,000x1.06 or 25,000/100=250x106=26,500
Step-by-step explanation:
What is 25% of 80? in table form
Answer:
20
Step-by-step explanation:
Percentage solution with steps:
Step 1: Our output value is 80.
Step 2: We represent the unknown value with x.
Step 3: From step 1 above, 80=100%.
Step 4: Similarly, x=25%.
Step 5: This results in a pair of simple equations:
80=100% (1).
x=25%(2).
Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have
{80} = {100%} {25%}
Step 7: Again, the reciprocal of both sides give
{80}= {25} {100}
x=20
Therefore, 25% of 80 is 20
sorry if this is hard to understand it was what was going on in my brain. Hope this helps tho byeeeeee
x1=4+x2=2 can someone tell me how do i do this?
Answer:
x3=4=2
Step-by-step explanation:
Add like terms. I believe that's what you're going for...
Hope this helped :)
HI PLEASE HELP WITH #13 and #14
Answer:
13. ∠x° = 99°
y° = 108
a ≈ 21.38
14. x° = 99°
Step-by-step explanation:
The given diagram is the diagram of a kite, therefore, we have;
One Pair of opposite angles are equal
Therefore, ∠x° = 99°
y° = 360 - 2 × 99 - 54 = 108
The base angles are;
(180 - 108)/2 = 36°
Similarly we have;
The side opposite ∠54° = 12 × 2 × cos(36°) ≈ 19.416
a/sin(63°) = 19.416/sin(54°)
a = sin(63°) × 19.416/sin(54°) ≈ 21.38
14. x° = 99°
The histogram represents the distribution of the number of seconds it took for each of 50 questions to find the answer to a trivia question the internet. which interval contains the median.
The interval that contains the median 25.5 is
(5 - 10)
What is a median?The median is the value that's exactly in the middle of a dataset when it is ordered.
We have a histogram as given below.
We need to make a table of class intervals and their frequency:
class interval frequency
0-5 22
5-10 5
10-15 9
15-20 9
20-25 5
25-30 1
We also need to find the cumulative frequency.
class interval frequency cumulative frequency
0-5 22 22
5-10 5 22 + 5 = 27
10-15 9 27 + 9 = 36
15-20 9 36 + 9 = 45
20-25 5 45 + 5 = 50
25-30 1 50 + 1 = 51
Now,
The number of questions = 50 ( even number)
Median:
= (50 + 1) / 2
= 51 / 2
= 25.5
We need to select the cumulative frequency where it is greater than the median.
So we have 27 which is at the interval (5 - 10).
Thus the interval that contains the median 25.5 is (5 - 10)
Learn more about histograms here:
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Solve for the value of q.
(49-5)°
39°
ty bought a notebook for $3 and pencils $2 if both items were on 25% off what did tyler spend
Answer: 1.25$
Step-by-step explanation:
25% of 5 dollars (total) is 1.25
Help pls !!
Math people
Answer:
none of the other answers are correct
Step-by-step explanation:
the range is the difference between the highest and lowest values in a set of numbers.
Answer:
second option
Step-by-step explanation:
The range of a function are the output values, that is the set of y values.
The midpoint of \overline{\text{AB}}
AB
is M(-2, 5)M(−2,5). If the coordinates of AA are (1, 7)(1,7), what are the coordinates of BB?
The coordinates of the B is obtained as (-5, 3).
What is referred as coordinates?Coordinates are 2 numbers (Cartesian coordinates) or a letter and a number that point to a specific point on a grid known as a coordinate plane.
A coordinate plane does have four quadrants as well as two axes: x (horizontal) and y (vertical) (vertical). The point where the two axes intersect is known as the origin, and its coordinates are (0, 0).Coordinates are composed as (x, y), which means the x axis point comes first, accompanied by the y axis point.Now, as per the given question;
The coordinates of A is given as (1, 7).
The coordinates of mid point M is given as (-2, 5).
The coordinates are listed in pairs, with the x value at the top.
The shift in the x location is as follows:
1 - (-2) = 3
The change in y position is as follows:
7 - 5 = 2
Because the midpoint is half - way between B and A, the change will remain constant, so x is;
- 2 - 3 = -5
And for is;
5 - 2 = 3
Therefore, the values of the coordinates of B is found as (-5, 3).
To know more about the Cartesian coordinates, here
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The correct question is-
If M (-2, 5) is the midpoint of AB and the coordinates of A are (1, 7), what are the coordinates of B?
Determine the quadrant point
Answer:
I think b
Step-by-step explanation: