Answers
Answer:
A.
Step-by-step explanation:
you have to find the discriminant
b²-4ac for each equation
if discriminant < 0 no real solutions because will be negative under the squareroot whhan you try to find the roots
if discriminant = 0 there is only one solution
if discriminant > 0 two real solutions
for your given problems
A. discriminant =(-2)²-4*2*15 will be negative
Related Questions
-4.8 (6.3x-4.18)=-58.56 what is x?
Answers
Answer:
x = 2.825
Step-by-step explanation:
-4.3(6.3x + -4.18) = -58.56
-4.3(-4.18 + 6.3x) = -58.56
(-4.18 * -4.3 + 6.3x * -4.3) = -58.56
(17.974 + -27.09x) = -58.56
17.974 + -27.09x = -58.56
17.974 + -17.974 + -27.09x = -58.56 + -17.974
0.000 + -27.09x = -58.56 + -17.974
-27.09x = -58.56 + -17.974
-27.09x = -76.534
x = 2.825175341
A recipe uses 375 g of potatoes and 225 g of lentils.
Write the ratio of the mass of potatoes to the mass of lentils as simply as possible.
Ratio =
Answers
Answer:
5g Potato : 3g Lentils
or
5:3
Step-by-step explanation:
1. 375 : 225
2. Find greatest common factor then divide by it.
3. 75g : 45g
4. 5:3
5:3 g
Step-by-step explanation:
375 : 225 = 375/225 = 75/45 = 5/3 = 5:3 g
Which graph shows a system of equations with an estimated solution of (–3.4, 1.2)? On a coordinate plane, 2 lines intersect around (negative 3.5, 1.8). On a coordinate plane, 2 lines intersect around (1.3, 3.4). On a coordinate plane, 2 lines intersect around (negative 3.5, negative 1.3). On a coordinate plane, 2 lines intersect around (negative 3.4, 1.2).
Answers
Answer:
It's D.
Step-by-step explanation:
Got it on edge
Answer:
yep its D
Step-by-step explanation:
Who can help me with my last question?
Answers
Answer:
wait what was the question i might be able to help if i know what it is
Which Angles are Congruent?
Angle A and Angle B
Angle C and Angle B
Angle A and Angle C
Answers
Answer:
Angle b
Step-by-step explanation:
Angles A and B.
Explanation: x and 9 are congruent because of isosceles triangle
how many times does 80 go into 4320
Answers
54. You can just divide
Answer:
54Step-by-step explanation:
There are 54 time 80 in 4320.
( 4320 : 80 = 54 )
Given the answer to a
problem asking you to simplify the expression,
write the possible problem. Explain how you
created the problem.
I really need help I don’t understand this. I will be given 20 points to whoever helps me. Thank you
Answers
Vera hiked a total of 138 miles in 12 days. She hiked the same distance each day. Write and solve a multiplication equation to find the number of miles m she hiked each day.
Answers
Answer:
11 miles ah day
Step-by-step explanation:
11.5 x 12
Answer:
138 divided by 12 =11.5
Step-by-step explanation:
or you can do 11.5 x 12 to check your answer
please help meeee
from edge about graphing an absolute value function
determine the domain and range of the function f(x)= -|x| + 2.
the domain of the function is__________
the range of the function is__________
the options are: all real numbers, all numbers greater than or equal to 2, and all numbers less than or equal to 2
Answers
Answer:
For the given function f(x)= -|x| + 2
the domain of the function is: All real numbers
the range of the function is: all numbers greater than or equal to 2
Step-by-step explanation:
We need to find the domain and range of the function f(x)= -|x| + 2.
Domain: Domain is defined as all the possible x values of x for which the function is true.
Range: Range is defined as all the possible y values.
So, For the given function f(x)= -|x| + 2
the domain of the function is: All real numbers (the function is true for all real numbers)
the range of the function is: all numbers greater than or equal to 2
(When solving the equation we will have value of f(x) equal or greater than 2)
Solve in simultaneou linear equation.
The total cost of bag and an umbrella is Rs 2000.If the cost of the bag is Rs 1000 less five times the cost of the umbrella ,find the cost of each of these two items.
Answers
Answer:
The bag costs 1500, while the umbrella cost 500
Step-by-step explanation:
Let the cost of the bag be b and the cost of the umbrella be u
Total cost is;
b + u = 2,000 •••••(i)
From the second part of the question;
b = 5u-1000 ••••••(ii)
Substitute ii into i
5u-1000 + u = 2000
6u = 2000 + 1000
6u = 3000
u = 3000/6
u = 500
To get b, substitute the value of u into equation ii
b = 5(500)-1000
b = 2500-1000
b = 1500
Determine the solution for the equation, 5w - 9= 44.
A) w=10.6
B) W=7
C) w=12.2
D) w=5.8
Answers
Answer:
A) 10.6
Step-by-step explanation:
5w - 9 = 44
Add 9 to both sides.
5w = 53
Divide by 5.
w = 10.6
5w=53
W= 10.6
Answer is A
what is the area of the figure below
A: 88in2
B: 48 in2
C: 68 in2
B:43in2
Answers
Answer:
The correct answer is C, 68in².
Answer:
68
Step-by-step explanation:
The are of the square is 3*3 = 9
Since we have two squares we need to mulitply by 2
9*2 = 18 is the total area of the squares
if you draw a line from the one square to the other you make a rectangle in the middle
the are of the rectangle is 10*3 which is 30
Two triangle has appared as we draw the line from one square to the other square.
The height of the traingle is (7 - 3)/2 which is 2
(2*10) / 2 = which is 10
Since we have 2 triangle we get result as 2*10 = 20
20+30+18 = 68
fill in the blanks.
1.
principal: $500
rate: 4.5%
time: ? years
interest earned: $112.50
new balance: ?
2.
principal: ?
rate: 8%
time: 2 years
interest earned: $108.00
new balance: ?
Answers
Answer:
One way of awarding interest is called simple interest. Before we provide the formula used in calculating simple interest, let’s first define some basic terms.
Balance. The balance is the current amount in an account or the current amount owed on a loan.
Principal. The principal is the initial amount invested or borrowed.
Rate. This is the interest rate, usually given as a percent per year.
Time. This is the time duration of the loan or investment. If the interest rate is per year, then the time must be measured in years.
To calculate the simple interest on an account or loan, use the following formula.
Simple Interest
Simple interest is calculated with the formula
I=Prt,
where I is the interest, P is the principal, r is the interest rate, and t is the time.
Step-by-step explanation:
One way of awarding interest is called simple interest. Before we provide the formula used in calculating simple interest, let’s first define some basic terms.
Balance. The balance is the current amount in an account or the current amount owed on a loan.
Principal. The principal is the initial amount invested or borrowed.
Rate. This is the interest rate, usually given as a percent per year.
Time. This is the time duration of the loan or investment. If the interest rate is per year, then the time must be measured in years.
To calculate the simple interest on an account or loan, use the following formula.
Simple Interest
Simple interest is calculated with the formula
I=Prt,
where I is the interest, P is the principal, r is the interest rate, and t is the time.
Given point P(9,-11), what are the coordinates of P' after a 180⁰ rotation?
(9,11)
(-9,11)
(-11,-9)
(11,9)
Answers
Answer:
-9,11
Step-by-step explanation:
The negative signs get flipped so if the number was positive it would become negative and vice versa.
Answer:
(-9,11)
Step-by-step explanation:
180 Degree Rotation
When rotating a point 180 degrees counterclockwise about the origin our point A(x,y) becomes A'(-x,-y). So all we do is make both x and y negative.
Will give brainlist if correct!
Which linear equation matches this graphed line?
y = 2x + 5
y = 1/2x-5
y = 2x+5
y = 1/2x + 5
Answers
Answer:
I think one of the choices was entered incorrectly. You have y=2x+5 listed twice. I believe the answer is y=-2x+5
Step-by-step explanation:
5 is the y-intercept and it is a +5 because it is above the x-axis. Slope = rise/run. In this case the slope should be negative thus -2x. Hope this helps.
Given: SIn(A)= 4/5 ,pi/2 < A< pi and sin(B)= -2square5/5, pi < B < 3pi/2
What is the value of cos(A-B)
A. -2square5/25
B. -square5/5
C. 2square5/5
D. 11square5/25
Answers
BRAINLEST and thanks!!
Answers
Answer:
X=0.500
Step-by-step explanation:
maths
Can somebody help me on this
Answers
Answer/Step-by-step explanation:
a. 3x + 13 = 12x - 2x
Add like terms
3x + 13 = 10x
3x = 10x - 13 (subtraction property of equality)
3x - 10x = - 13 (substraction property of equality)
-7x = -13
-7x = -13/-7 (division property of equality)
x = 13/7
b. 6j - 12 + 4j - 8 = 10
Add like terms
6j + 4j - 12 - 8 = 10
10j - 20 = 10
10j = 10 + 20 (addition property of equality)
10j = 30
10j/10 = 30/10 (division property of equality)
j = 3
c. 10y - 4y = 14 + 2y - 3y
Add like terms
6y = 14 - y
6y + y = 14 (addition property of equality)
7y = 14
7y/7 = 14/7
y = 2
d. 4p + 8 - 3p = 33
Add like terms
4p - 3p + 8 = 33
p + 8 = 33
p = 33 - 8 (subtraction property of equality)
p = 25
Two angles are supplementary if their measures add up to 180°. If one of two supplementary angles is (3x + 7)° while the other is (5x - 11), then x =
A.25
B.21
C.24
D.20
E.23
Answers
Answer:
E. 23
Step-by-step
3x + 7 + 5x - 11 = 180
* add 3x and 5x
8x + 7 - 11 = 180
* do 7-11
8x - 4 = 180
* add 4 to both sides to cancel it out
8x = 184
* divide 8 on both sides to get x alone
x = 23
I need these questions answered ASAP can you help me with 12,13,14 pls
Answers
19-(-7)/-1-(-2)=26
13.) 14
8-(-20)/5-3=14
14.) -4/5 is the slope
Count rise over run and always make sure whether to add a negative based on the direction of the line. In this situation, the line is negative so there is a negative sign present.
8 True or False: The substitution method is a method of solving systems of equations by adding equations together in such a way that the variables are set aside, one by one.
Answers
Answer: I personally think it's true but I am not for sure
Step-by-step explanation:
In triangle ABC, what is the measure of angle Cif A = 85°, a = 35, and c = 25?
Answers
yes the answer is C = 25
In the equation y=mx, how do you find m on a graph?
Answers
Answer:
m is the slope of the equation y=mx+b. TO find the slope you look at the y intercept of the graph, b, and from that point find how much up/down and to the right/left you need to go. For example from point 0, 4, the y intercept, to another point on the graph (any point on the line would work) 2, 8 , I need to go up 4 units and to the right 2 units. The slope is 4/2 or just 2.'
If this is too confusing just find two points on the line in a graph and folow this equation: y2-y1 / x2-x1
where y2 is the y value of the second point, y1 is the y value of the first point, x1 is the x value of the first point and x2 is the value of x in the second point
Step-by-step explanation:
Answer:
In the equation y=mx+b, m is the slope. The formula for slope is [tex]\frac{y_{1}-y_{2} }{x_{1}-x_{2} }[/tex], so to solve find any two points on the graph and plug them into the formula. You could also count the difference, remember that slope is the change in y over the change in x. For example, if y increases by 3 units and x increases by 2 units then the slope is 3/2.
Please help everyone trolling me
Answers
Answer:
3
Step-by-step explanation:
Sales tax in your community is 6 percent. If you go to a sporting goods store and buy a soccer ball for $19.95, socks for $5.95, and a headband for $10.00, what amount will you pay once the sales tax is added to your purchase?
Answers
Answer:
$26.90 + $1.61 = $28.51
6. Complete the pattern: 4, 8, 12, 16,
Answers
Answer:20,24,28,32
Step-by-step explanation:
Answer:
20, 24, 28, 32
Step-by-step explanation:
The sequence is counting by 4. Wasn't sure how many numbers you were looking for, but if you need more than what was given in the answer then keep counting up by 4.
!!!!Hurryy plz will give 20 points and brainlyest plzzzzzz!!!
Which division problem does the model show?
Answers
Answer:
B
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
It’s percentage need help
Answers
Answer:
Last week, she earned a total of $702 last week in commission.
Step-by-step explanation:
To solve this, we first need to find 13% of $5,400.
5,400 x 0.13 = 702
Therefore, Nadia earned a total of $702 last week in commission.
Now, we need to calculate how much money she'll earn in a whole year. So, let's see how many weeks are in a year.
1 year = 52 weeks when rounded to the nearest whole number
702 x 52 = $36,504
Therefore, Nadia earned a total of $36,504 in commission in 2011.
Hope this helps! :D
f(x) =∛2x g(x)=2x+1 Find (f/g) (x) Include any restrictions on the domain
Answers
Answer: ∛2x / 2x+1
x cannot equal -1/2
Step-by-step explanation: f/g means we divide the f function by the g function
so that’s all we do!
then, remember, we can’t divide by 0. so 2x+1 can’t be 0. if we solve that out, we get that x can’t be -1/2, because that would make it 0. there’s our domain restriction!
Please help fast too easy questions for double the points I’ll give brainless also and 10 point!
Answers
Answer:
78.5
Step-by-step explanation:
add 1+2+3+4+5+6+7+100-56=78.5
The second question is 5^1/2
Could you mark me as brainliest please?