Answer:
discriminant: 4; number of real roots: 2
Step-by-step explanation:
The coefficients a, b and c of this quadratic are {-3, -2, 0}.
Thus, the discriminant b^2 - 4ac is (-2)^2 - 4(-3)(0), or 4.
Because the discriminant is positive, this quadratic has two real, unequal roots.
-3p^2 - 2p can be factored as follows: -p(3p + 2). If we set this expression equal to zero, we can find the roots: {-2/3, 0}
Please help me everytime I post this no one helps :( and I need this done soon
Answer:
Its should be 1 because the graph shows you thats its 1
Can you help me with these two? Sorry!
Answer:
3. second
4. first
Step-by-step explanation:
how much feet is in a mile
Answer:
5280
Step-by-step explanation:
Answer:
There are 5,280 feet in a mile.
Write an exponential growth model for each situation.
1. initial value: 2,000
growth rate: 6%
2. initial value: 50
growth rate: 75%
3. initial value: 40
growth rate: 100%
plz help i will give brainliest
Answer:
1. [tex]y=\frac{2}{3}x-2[/tex]
2. [tex]y=\frac{-5}{4}x+5[/tex]
Step-by-step explanation:
all you are doing is solving for "y"
Answer:
ans 1. -2x = -6-3y
-2x = 9y
xy = -2/9
ans 2. 5x = 20 - 4y
5x = 16y
xy = 5/16
I hope it helps....
When you cut a pyramid straight up and down, what shape is your cross section?
Answer:
The cross section of a pyramid that is perpendicular to the base will be a triangle.
Step-by-step explanation:
Some help me it’s timed
Answer:
43 m. Perimeter is all the sides added together.
Solve the system of equations.
[tex]y = 4x + 1[/tex]
[tex]3x + 2y = 13[/tex]
1. (1, 5)
2. (5, 1)
3. (0.25, 2)
Answer:
(1,5)
Step-by-step explanation:
Substitute the first equation into the second:
3x + 2(4x+1) = 13
3x + 8x + 2= 13
11x = 11
x = 1
y = 4(1) + 1 = 5
(1,5)
Berto has $12 to put gas in his car. If gas costs $3.75 per gallon, which ordered pair relating number of gallons of gas, x, to the total cost of the gas, y, includes the greatest amount of gas Berto can buy? pls i need help
Answer:
about 3.2 gallons. (3.2, 12)
Step-by-step explanation:
If gas costs $3.75 per gallon and Berto has $12, then he can purchase 12/3.75 gallons. This is approximately 3.2 gallons. So the coordinate on this line would be (3.2, 12)
about 3.2 gallons. (3.2, 12)
Answer:
Step-by-step explanation:
Thank you chuuuuuu
Also pwease stop being meannnn
May someone please help me with these 4 questions? That is all i ask of you.
Answer:
Step-by-step explanation:
7: Area=77km^2
8: Not sure I think Area=77cm^2
9: Area=56m^2
10: Area=43.51km^2
Im not too sure of this problem but I hope this helps
In slope-intercept form what is m=-2, b=8/5
Answer:
y = -2x + 8/5
Step-by-step explanation:
Use a Number line to order the numbers from least to greatest (please do 25 and 29!!!!)
Answer:
#25: 0.023 < 22%
#29: 7/8, 0.88, 90%
Step-by-step explanation:
#25: Use this trick whenever converting decimals into percent. Move the decimal point two spaces to the right. Example: 0.01 = 1%
#29: Divide 7 by 8 for 7/8 and convert the decimal into a percent. Do the same with 0.88. Then just list these measures on a number line :D
HELP!!!!!!!If a 0.27 cm long crystal appears to be 13.5 cm long under a
microscope, what is the power of the microscope?
Answer:
50 times magnification
Step-by-step explanation:
13.5/0.27
PLS HELP I WILL GIVE BRAINLIEST
Answer:
I think it is the second one i am so so so sorry if it wrong
Step-by-step explanation:
11. What number is 30% of 12? What are you going to solve?
a. rate
b. percentage
c. base
d. decimal
Answer:
3.6 D. decimal
Step-by-step explanation:
A car travels 80 millimetres in 2 1/2 hours . What is it speed in kilometres per hour
Answer:
32 Kilometers
Step-by-step explanation:
A Car travels 80 Kilometers in 2 and Half hours.
1 Hour =60 minutes, 2 & Half hours= 2.5*60= 150 minutes
Kilometers travelled by Car in a hour= 80/150*60= 32 Kilometers
Can someone tell me which equation this is
1. f(x)= 1/4x +4
2. y=1/2x +4
3. f(x)=-2/3 +4
Answer:
#3
Step-by-step explanation:
The line follows an inverted slope format, indicated by -2/3. Or down 2, and 3 to the right after going up by 4, creating the line. The other equations would flip the line horizontally because of a positive slope.
What is 21 dimes to go 30 dimes
Answer:
Do a quick conversion: 1 dimes = 0.1 dollars using the online calculator for metric conversions. Check the chart for more details. ... Convert dime to dollar - Conversion of Measurement Units ... 30 dime to dollar = 3 dollar. 40 dime to ... You can do the reverse unit conversion from dollar to dime, or enter any two units below: ...
Step-by-step explanation:
Not an answer but an explanation. Hope this helped :)
what is th answer to
Find the Area: R= 8cm
Answer:
64 π ( c m ) ^2
Step-by-step explanation:
Everyone will have juice in party and you have 10 liters of a juice blend (mixture of
pure juice and water) that is 60% pure juice.
1. How many liters of pure juice need to be added in order to make a blend that is 75% juice?
2. How many liters of pure juíce need to be added in order to make a blend that is 90% juice?
Answer: you added 6 liters of juice
Step-by-step explanation:
You have 10 liters of a juice blend that is 60% juice. How many liters of pure juice need to be added in order to make a blend that is 75% juice?
Ten liters of a juice blend at 60% juice means you also have ten liters of a juice blend at 40% water. 10 x .40 yields 4 liters of water in your blend.
A juice blend of 75% has a water content of 25%. So the same 4 liters of water must represent 25% of the blend after adding more juice.
4/.25 = 16 liters. 16 x .75 = 12.
12 + 4 = 16.
That means after adding your juice you will have 16 liters of blend at 75% juice.
You originally had 10 liters at 60% and now you have 16 liters at 75% . Subtracting 10 from 16 means you added 6 liters of juice.
2. Solve 3x + 2y = 7 and x - 4y = -21 by using substitution.
F (3,-1)
H(-1,5)
G()
J (1,5)
Answer:
The answer is ( - 1 , 5 )
i hope this helps you
I need help with #6 please help if you can
Answer:
Please find attached
Step-by-step explanation:
Answer:
65
Step-by-step explanation:
2x + 25 + 25 = 180
2x + 50 = 180
2x = 180 - 50
2x = 130
2x / 2 = 130 / 2
x = 65
The curve formed by a quadratic equation is called a...?
Answer: The curve formed by a quadratic equation is called a PARABOLA
Step-by-step explanation:
Answer:
Parabola
Step-by-step explanation:
What is the Solution of the equation y=2x+3
Answer:
let X interchange y and vice versa
X= 2x+3
carry across +3
X-3=2X
carry across 2 (2X is 2 multiple by X when carried across the sign change to division)
so X-3 divided by 2 is = X
could be misinterpreting this question so I'm not entirely sure.
I NEED HELP OW RN rn please
Answer:
(4,10)
Step-by-step explanation:
Well, you just count each unit coming from the x-axis up and then do the same for the y axis going to the right. You can also see that the graph is counting by 2 if you look at the "O" coordinate
In AABC, what is the measure of angle B?
B
(2x)
(x + 2)
140°
A
с
O 46°
O 489
O 70°
O 920
Answer:
92°
Step-by-step explanation:
∠C=180-140=40
∠A+∠B+∠C=180
40+2X+X+2=180
X=46
∠B=46*2=92°
Answer: 92 degrees
Step-by-step explanation:
The exterior angle measuring 140 is equal to the sum of the two remote interior angles.
(X+2) + (2x) = 140. Combine like terms.
2 + 3x = 140. Subtract 2 from both sides.
3x = 138. Divide both sides by 3.
X = 46
Angle b = 2x. Substitute 46 in for x.
Angle b = 2(46)
Angle b = 92
Find the number of real-number solutions of the equation.
x2 + 10 = 2
A. two solutions
B. one solution
C. no solutions
D. infinitely many solutions
Answer: A
Step-by-step explanation:
Take the root of both sides and solve.
Answer:
A
Step-by-step explanation:
It just is
33 points | dont guess please | no links
Answer:
Joe mama
Step-by-step explanation:
I need to know X for 8 and 10 if u feel like it. PLS
Answer:
8) x=9
10) 23 degrees
Step-by-step explanation:
8) vertical angles are congruent to each other so we can set the expressions as such and solve:
7x + 3 = 10x - 24
3 = 3x - 24
27 = 3x
9 = x
10) since the angles are complementary they equal 90 degrees, so we can set the expression like this and solve for x:
12x + 7 + 6x - 7 = 90
18x + 7 - 7 = 90
18x = 90
x = 5
now we plug it back into the expression equivalent to the measure of angle O:
6(5) -7
30 - 7
23 degrees
Peggy is laying 60 ft from the base of a tree. The angle of elevation for her to see
the top of the tree is 50º. Use a trigonometric ratio and calculator to find the
height of the tree to the nearest tenth of a foot.
Answer:
The height of the tree is approximately 71.5 feet
Step-by-step explanation:
The given parameters are;
The angle of elevation to see the top pf the tree = 50°
The distance Peggy is laying from the base of the tree = 50 ft.
In order to answer the question using trigonometric ratio, we assume that the angle the tree makes with the ground is 90° that is the tree is perpendicular to the ground
Therefore, the line of sight to the top of the tree, the height of the tree, and the distance from the base of the tree where Peggy is laying, forms a right triangle
Let, 's', represent the line of sight to the top of the tree, let 'h', represent the height of the tree, and let, 'd', represent the distance from the base of the tree where Peggy is laying
The third angle, θ, of the right triangle opposite 'd' is given by angle sum theorem of a triangle as follows;
θ = 180° - 90° - 50° = 40°
θ = 40°
By sine rule we have;
h/sin(50°) = d/(sin θ)
∴ h/sin(50°) = 60 ft./(sin 40°)
h = sin(50°) × 60 ft./(sin 40°) = 71.5052156 ft.
∴ The height of the tree, h ≈ 71.5 ft. by rounding to the nearest tenth