Answer:
C
Step-by-step explanation:
Remember that we can use the discriminant to determine the amount of roots that a quadratic function has.
If the determinant equals 0, then we only have one real root.
Our function is given by:
[tex]f(x)=x^2+bx+9[/tex]
Then the discriminant will be:
[tex]\Delta = b^2-4(1)(9)=b^2-36[/tex]
We only have one real root, thus our discriminant must be 0:
[tex]0=b^2-36[/tex]
Solve for b:
[tex]b^2=36[/tex]
Thus:
[tex]b=\pm 6[/tex]
The answer is both II and III.
The final answer, then, is C.
#10) Cross multiply and divide to solve for x*
2/5 = X/70
Answer:
28=x
Step-by-step explanation:
2/5=x/70
(70/1)(2/5)=x/70(70/1)
here you cancel 70 into 5 to get 14 and on the other side cancel both the 70s
14*2=x
28=x
Answer:
28
Step-by-step explanation:
multiply 2 * 70 then divide by 5
This table of values represents a linear function.
Х
у
0
2
3
8
6
14
Enter an equation that represents the function defined by this table of values.
x Х
Answer:
The answer is y=3x+6
Step-by-step explanation:
a is the point with coordinates (1,4) b is the point with coordinates (7,22) Find the gradient AB
Answer:
The gradient AB is 3
Step-by-step explanation:
Here. we want to find the gradient AB
This is the same as finding the slope of the line that connects the two points
mathematically. we have this as;
m = (y2-y1)/(x2-x1)
(x1,y1) = (1,4)
(x2,y2) = (7,22)
m = (22-4)/(7-1) = 18/6 = 3
. Bryon competes on the school debate team. He won 0.40 of the debates in which he participated. Which statement is not true about Byron's debates?
Answer: See explanation
Step-by-step explanation:
You didn't give the options but let me help out.
Since Bryon won 0.40 of his debate, this means that he won 40% of his debate. 40% converted to fraction equals 40/100 = 2/5.
Since he won 40%, it means that he lost (100% - 40%) = 60%. He lost 3/5 and won 2/5.
Question 4 of 5
Solve y3 = 125.
O A. y = 15
O B. y = 25
O C. y = 5
O D. y = 11.2
Answer:
the answer is c. y=5 =5×5×5
Brayden stated that a flying disc had a circumference of 43.96 in. Eliza wanted to find the area of the same flying disc. What is the area of the flying disc rounded to the nearest whole number? Both Brayden and Eliza used 3.14 for π
Answer:
=153.86
Step-by-step explanation:
Circumference: 43.96
43.96/3.14= 14 = diameter
14/2= 7 = radius
area= 3.14(7)^2
=3.14(49)
=153.86
what is 20% of 24cm?
Answer:
20% of 24cm=20/100×24=4.8cm
Answer:
4.8cm
Step-by-step explanation:
24x20%=20×0.20=4.8cm
Can someone help me on this
Answer:
Step-by-step explanation:
14y-1=11y+17 subtract 11y from both sides
3y-1=17 add 1 to both sides
3y=18, divide both sides by 3
y=6
Since DG=EF
EF=9y+4 and using y=6
EF=9(6)+4
EF=54+4
EF=58
Solve for x 4.12+52=8.23
Answer:
The answer is x = −10.6237864
Find the exact value cos A in simplest radical form
Answer:
5/radical 26
Step-by-step explanation:
The speeds (in miles per hour) of motorists ticketed during one day on a five-mile stretch of highway are
listed below.
80, 70, 89, 85, 85, 75, 72, 73, 80, 83, 86, 88, 88, 70, 89, 74, 75, 84, 73, 71
The mean speed is 79.5 mph with a standard deviation of 6.8 m.
If the police decide to only ticket people going 3 standard deviations or more above the standard deviation, what would the range be?
Your answer:
Answer:
19
Step-by-step explanation:
Range is solved by subtracting the lowest and highest numbers which int his case is 70 and 89 so that make 19
hey honeys, anyone wanna help me out here? <3
Answer:
D:4
Step-by-step explanation:
12(4)-5=5(4)+23
43=43
Hope this helps
pls help find the value of x
What is the solution to the system of equations?
Fill in the blanks to explain one way to solve this system of equations using elimination.
6x + 2y = 14
5x – 2y = 8
First, add the two equations to get 11x =
. Then substitute
for x in either equation to get y =
.
HELPP MEE PLSSS HELPP
Answer:
angle N is 79, angle K is 22, angle P is 81, angle D is 76
Step-by-step explanation:
all of the angles should add up to 180 degrees so add the two angles you have and subtract them from 180
Answer:
KGH is similar
Step-by-step explanation:
using the triangle sum theorem
A number is greater than 8 The same number of possible solutions to the inequality
Answer:
48
Step-by-step explanation:
Answer:
There is one solution because 9 is the only number between 8 and 10.
Brainliest?
One angle of an isosceles triangle measures 42°what other angles could be in that triangle 42°
what is the percentage of sugar in the syrup made of 10kg of water and 15kg of sugar?
I GIVE BRAINLIEST
Answer:
10 kg water, 2 kg of sugar.....total of 12 kg of syrup
percentage of sugar is : 2/12 = 0.166 rounds to 0.17 = 17%
Step-by-step explanation:
sixteen less than a number squared
Answer:
16-x^2
Step-by-step explanation:
round to the nearest tenth
Answer:
Step-by-step explanation:
Say you wanted to round the number 838.274. Depending on which place value you'll round to, the final result will vary. Rounding 838.274:
Rounding to the nearest hundred is 800
Rounding to the nearest ten is 840
Rounding to the nearest one is 838
Rounding to the nearest tenth is 838.3
Rounding to the nearest hundredth is 838.27
Basic Rules of Rounding
When you "round to the nearest _____" regardless of what goes in the blank the steps are nearly always the same:
Identify which place value you are rounding to. The smaller the place value, the more accurate the final result will be.
Look to the next smallest place value, the digit to the right of the place value you're rounding to. For example, if you want to round to the nearest ten you'd look at the ones place.
If the digit in the next smallest place value is less than five (0, 1, 2, 3, or 4), you leave the digit you want to round to as-is. Any digits after that number (including the next smallest place value you just looked at) become zeros, or drop-off if they're located after the decimal point. This is called rounding down.
If the next smallest place value is greater than or equal to five (5, 6, 7, 8, or 9), you increase the value of the digit you're rounding to by one (+1). Just like before, any remaining digits before the decimal point become zeros, and any that are after the decimal point are dropped. This is called rounding up.
Round to the Nearest Hundred: 3250
Identify the hundreds digit: the 2 in 3250
Identify the next smallest place value: the 5 in 3250
Is that digit greater than or equal to five? Yes, so round up.
Increase the hundreds digit by one, so 2 becomes 3. Every digit after becomes a zero.
3250 rounded to the nearest hundred is 3300
Round to the Nearest Ten: 323.5
Identify the tens digit: the 2 in 323.5
Identify the next smallest place value: the 3 in 323.5
Is that digit greater than or equal to five? No, so round down.
The tens digit stays the same at 2. Every digit after becomes a zero. Digits after the decimal point are dropped.
323.5 rounded to the nearest ten is 320
Round to the Nearest Ten: 499
Identify the tens digit: the first 9 in 499
Identify the next smallest place value: the second 9 in 499
Is that digit greater than or equal to five? Yes, so round up.
The tens digit increases by one. Since 9+1=10, you need to carry the 1 and add it to the digit in the hundreds place. Each digit after becomes a zero.
499 rounded to the nearest ten is 500
Round to the Nearest Tenth: 0.74
Identify the tenths digit: 7 in 0.74
Identify the next smallest place value: the 4 in 0.74
Is that digit greater than or equal to five? No, so round down.
The tenths digit stays the same at 7. Since the remaining digits are after the decimal point you just drop them.
0.74 rounded to the nearest tenth is 0.7
Round to the Nearest Hundredth: 3.141
Identify the hundredths digit: the 4 in 3.141
Identify the next smallest place value: the second 1 in 3.141
Is that digit greater than or equal to five? No, so round down.
The hundredths digit stays the same at 4. Drop the digits to the right of 4.
3.141 rounded to the nearest hundredth is 3.14
Please I need help with this question
PLEASE HELP ASAP ILL GIVE YOU 30 POINTS Jamie is excited for spring break this year. Her family is planning a vacation! She fully intends to take 20 pictures each day. checking her phone before leaving she notices she has 75 pictures already on the phone.
Given that the vacation will last a full seven days and Jamie's phone can hold a total of 200 pictures. How many pictures will she need to delete an order to make enough room in her phone for vacation photos?
Answer:
15 photos
Step-by-step explanation:
one can start off by first seeing how many photos will be taken on the vacation. We can do that by multiplying the days with how many photos will be taken for each- so 20×7= 140. Then we can take the total amount of photos the phone cam hold-200 subtract what we already have 200-75= 125 thats how much space if left but we need more (140). So the. we can start making quick guesses by taking 5 from 75 and see what we get then taking another 5 and another if needed we get 60 that finally gives when subtracted from 200- 200-60=140 the amount of space we need. Then finally we can just do 75-60 to get the total amount of photos we must delete. 75-60= 15
hi i have 5 mins to turn in please help
Answer:
x=8
Step-by-step explanation:
Please answer for Brainiest.
ABCD is a parallelogram. Find the indicated measure:
Answer:
12 12 12 12 12 12 12 12 12 1 2 12 12
At a sale this week, a desk is being sold for $133 . This is 35% of the original price.
What is the original price?
Answer:
392.35
Step-by-step explanation:
35% + 35% is 70 % so 133 +133 is 70 % witch is 269.
next we need to figure out 30 percent and they give us 35 % so. you add to zeros to 30 because percentage is out of 100 and there are 2 zeros in 100. so it look like this
3000 ÷ 133 = 22.56 is 30% of 133
70% + 30% = 100%
269 + 22.56= 291.56 is your answer
What is 40 dollars taxed by 8%?
Answer:
Before Tax Price: $40.00
Sale Tax: 8.00% or $3.20
After Tax Price: $43.20
Step-by-step explanation:
Ms. Fox loves to eat cereal and she notices that she only has 1/3 of the box of cereal left. If she spread that amount across 5 days, how much cereal will she have for each day?
Answer:
1/15
Step-by-step explanation:
Ms. Fox loves to eat cereal and she notices that she only has 1/3 of the box of cereal left. If she spread that amount across 5 days, how much cereal will she have for each day?
The amount of cereal she would have per day is calculated as:
5 days = 1/3 of the box
1 day = x
Cross Multiply
5 days × x = 1 day × 1/3 of the box
x = 1/3 ÷ 5
x = 1/3 × 1/5
x = 1/15 of the box
Which of the following is an increasing exponential function whose y-intercept is 50?
y = (2)* + 50
y = 50x - 4
y = 50(1.4)*
y = 500.05)*
(The little star things are x in exponent form)
• Write an expression that is equivalent to 3(7 + x).
3(7 + x)
+
?
2
Answer:
21+3x
Step-by-step explanation:
Expand this:
3(7+x)
So it becomes:
21+3x
Answer:
21+3x
Step-by-step explanation: