please help me out, need help asap:) thank you

Please Help Me Out, Need Help Asap:) Thank You

Answers

Answer 1

Answer:

See below.

Step-by-step explanation:

Solving :-

#1

x² - 2x - 15 = 0x = 2 ± √4 - 4(1)(-15) / 2x = 2 ± √64 / 2x = 2 ± 8 / 2x = 1 ± 4x = 5, -3

#2

8x² + 2x - 15 = 0x = -2 ± √4 - 4(8)(-15) / 16x = -2 ± √484 / 16x = -2 ± 22 / 16x = -1 ± 11 / 8x = 5/4, -3/2

They both have the numerator in both solutions to be 5 and -3 respectively. I believe this is because both equations have the constant term, c, to be -15 and 5 and -3 are factors of -15.


Related Questions

A car travels 60km/h and then a further 180km at 160km/h find the total time taken

Answers

Answer:

30

Step-by-step explanation:

Hi I am so not helpful do not use this answer

30 is your answer I’m pretty sure

The town of KnowWearSpatial, U.S.A. Operates a rubbish waste disposal facility that is overloaded if its 4749 households discard waste with weights having a mean that exceeds 27.21 lb/wk. For many different weeks, it is found that the samples of 4749 households have weights that are normally distributed with a mean of 26.86 lb and a standard deviation of 12.82 lb. What is the proportion of weeks in which the waste disposal facility is overloaded? P(M > 27.21) =

Answers

Answer:

0.48911

Step-by-step explanation:

The formula for calculating a z-score is is z = (x-μ)/σ,

where x is the raw score, = 27.21 Ib

μ is the population mean = 26.86 lb

σ is the population standard deviation. = 12.82 lb

z = 0.027301

Probability value from Z-Table:

P(x<27.21) = 0.51089

P(x>27.21) = 1 - P(x<27.21) = 0.48911

The proportion of weeks in which the waste disposal facility is overloaded is

0.48911

The cost of labor for servicing cars at B&B Automotive is $50 for each whole hour or for any fraction of an hour. There is a $25 additional charge to get the oil changed & fluid checked. What would be the cost of servicing a car that required 3.45 hours of labor if the owner requested that the oil be changed and the fluids be checked? a. $100 c. $225 b. $175 d. $250

Answers

Answer:

d. $250

Step-by-step explanation:

We can use the equation of a straight line to model the cost of servicing the car.

let the cost be y and the number of hours be x

and the charge per hour is m

y=mx+c

y=50x+25

given that the time is 3.45 hours it is assumed that the charge is for 4 hours since for a fraction of 0.45 hours we are charged $50

y=50(4)+25

y=200+25

y=$225


HELP QUICKLY!!
10+(28-8)/4

Answers

Answer:

15

Step-by-step explanation:

The order of operations is the key to solving this problem.

The PEMDAS acronym stands for:


Parenthesis

Exponents

Multiply

Divide

Add

Subtract

10+(28-8)÷4

First, solve parenthesis.

[tex]\sf{10+(28-8)\div4}[/tex]

[tex]\sf{28-8=20}[/tex]

Rewrite the problem down.

[tex]\sf{10+20\div4}[/tex]

Then, divide.

20/4=5

Rewrite the problem down.

10+5

Add.

[tex]\sf{10+5=\boxed{\sf{15}}[/tex]

So, the correct answer is 15.

I hope this helps you! Please let me know if my answer is incorrect.

Answer:

[tex]\displaystyle 15[/tex]

Step-by-step explanation:

[tex]\displaystyle Grouping\:Symbols \hookrightarrow G \\ Exponents, Indices, or\:Radicals \hookrightarrow E \\ Multiplication\:and/or\:Division \hookrightarrow M \\ Subtraction\:and/or\:Addition \hookrightarrow S \\ \\ 10 + (28 - 8) \div 4 \hookrightarrow 10 + 20 \div 4 \\ \\ \boxed{15} = 10 + 5[/tex]

By using GEMS, the result is fifteen.

I am joyous to assist you at any time.

Ian is trying to pick out an outfit for the first day of school. He can choose from 2 pairs of pants, 2 t-shirts, and 3 pairs of shoes. How many different outfits does Ian have to choose from?

Answers

Answer:

He has four outfits if he switches shirts once.

In the adjoining equilateral [tex] \triangle[/tex] ABC , AD ⊥ BC and AC = 2a units. Prove that sin 60° = [tex] \sf{ \frac{ \sqrt{ 3} }{2} }[/tex] .

Answers

Answer:

See Below.

Step-by-step explanation:

Since ΔABC is an equilateral triangle, this means that ∠A, ∠B, and ∠C all measure 60°.

Furthermore, all sides of the triangle measure 2a.

We know that AD⊥BC. Since this is an equilateral triangle, any altitude will be a perpendicular bisector. Therefore, BD = DC, ∠CAD = 30° and ∠C = 60°.

Additionally, the measures of the segments are: BD = DC = (2a) / 2 = a.

Let’s use the right triangle on the right. Here, we have that DC = a and AC = 2a.

Recall that sine is the ratio of the opposite side to the hypotenuse. Therefore, sin(C) or sin(60°) will be AD / AC. We can find AD using the Pythagorean Theorem:

[tex]a^2+b^2=c^2[/tex]

a is DC, b is AD, and c is AC.

Substitute in appropriate values:

[tex]a^2+(AD)^2=(2a)^2[/tex]

Solve for AD:

[tex]\displaystyle \begin{aligned} a^2+(AD)^2&=4a^2\\(AD)^2&=3a^2\\AD&=\sqrt{3a^2}=a\sqrt{3}\end{aligned}[/tex]

Sine is the ratio of the opposite to the hypotenuse:

[tex]\displaystyle \sin(C)=\sin(60\textdegree)=\frac{\text{opposite}}{\text{hypotenuse}}[/tex]

Substitute:

[tex]\displaystyle \sin(60\textdegree)=\frac{AD}{AC} = \frac{a\sqrt{3}}{2a}[/tex]

Simplify. Hence, regardless of the value of a:

[tex]\displaystyle \sin(60^\circ)=\frac{\sqrt3}{2}[/tex]

How did you get the answer.

Answers

I dunno. Here is a bald lady emoji thought ‍

35 is what percent of 56?

Answers

Answer:

19.6

Step-by-step explanation:

35% of 56

=35/100×56      

19.6

hope this helps

pls brainliest!!!!!

Answer:

19.6 is the answer

Step-by-step explanation:

35%of 56

35/100×56

19.6 answer


70% of the shoes in the UK are made abroad. if you survey 120 people about the shoes they are wearing, how many do we expect to have UK-made shoes?

Answers

Answer:

84

Step-by-step explanation:

70% of 120= 84

what is e( f + g) as a distributive property and in expanded form?

Answers

e(f + g) = ef + eg

This expression has distributive property shown above.
Distributive property = e(f+g)
= ef + eg

Expanded form = (e x f) + (e x g)

Select the correct answer.
A bicycle wheel company packages each wheel in a square box. Each wheel has a circumference of about 56.5 inches. What is the approximate length of each side of the box?

A.
81 in
B.
18 in
C.
24 in
D.
9 in

Answers

Answer:

the correct answer is B. 18 in

Which is equivalent to represent by the table

Answers

Bar-charts are similar to tables and good for recording information and data sorry if it’s wrong i didn’t quite get what you meant hope this helped

A dessert has both fruit and yogurt inside.
Altogether, the mass of the dessert is 185g.
The ratio of the mass is 2:3.
What is the mass of the yoghurt?

Answers

Answer:

74g:148g

Step-by-step explanation:

If the yogurt portion is 3, then your answer is 148g.

You have a total of 5 portions (2+3=5). Since all portions must be equal, you can divide the total (185g) by 5. That means each portion is 37g each. To find the total weight of the yogurt, we multiply by the number of portions, either 2 or 3. That would be your result.

find x with reason(s)

Answers

Answer:

Well we know this is a parallelogram

-A theorem states that if both opposite side of a quadrilateral (4 sided shape) are congruent then it’s a parrlelogram.
-We also know this is a rhombus becuase all sides are congruent and has no right angle present. A theorem to support this is, If two consecutive sides of a parallelogram are congruent, then the parallelogram is a a rhombus.

So we’re trying to find x.

A theorem states that “The diagonals of a rhombus bisects two angles of the rhombus.”

Bisect means cut in a way that both angles are equal.

That means the two angles given have to be equal to each other.

We can make an equation.

110-x = x

Now solve
2x= 110

X= 55

X would equal 55

x=55

find the equation of the line. use exact numbers

Answers

Answer:

[tex]y = 0.5x + ( - 3)[/tex]

or

[tex]y = 0.5x - 3[/tex]

Amanda has a bookcase with 30 books. There are 3 shelves in the bookcase. Each shelf has the same number of books. How many books does each shelf have?

Answers

Answer:10 books per shelf

Step-by-step explanation:

30 books

3 shelves

30x3=10

10 books per shelf

The radius of a circle is 65 centimeters.
Enter the circumference of the circle, in centimeters. Round your answer to the nearest hundredth.

Answers

circumference = 2 x pi x r

r = 65 cm

so C ≈ 2 x 3,14 x 65 ≈ 408,20

Answer: C=408.41 centimeters

Step-by-step explanation:

2 times pi times 65

130 pi

Approximately 408.41

PLZ HELP DUE IN 10

A 32-oz jug of orange juice may not contain exactly 32 oz of juice. The possibility of measurement error exists when the jug is filled in the factory. If the maximum measurement error isoz, write an absolute value in equality representing the range of volumes,x, in which the orange juice jug may be filled.

Answers

Answer:

If the maximum measurement error is at most 0.08 oz. , write and solve an absolute value inequality for the range of the possible number of ounces, Z, that can be in a jug of orange juice.

Simplify your answer and write it in interval notation.

Step-by-step explanation:

I will only give you that. I am so sorry that my response is this late love. If there was some way to receive your question, I would most definitely help you! I hope you did well on this problem!

=)

The total weight of 15
chairs is 45 pounds.
How many pounds
would 40 chairs weigh?

Answers

try 10 maybe because if there’s 45 it might be going up by 5 so if it’s 40 it would be 10

PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS PLS

Answers

Answer:

( 1, -2)

step-by-step explanation:

original coordinates of C: (4, -2)

if reflected over y-axis: use the formula: (x,y) → (-x,y)

new coordinates: (-4, -2)

then if translated 5 units horizontally, there will be change in x axis:

new coordinates: (-4+5, -2) → ( 1, -2)

Does anyone know the answer? Pls help

Answers

Answer:

x = 24

Step-by-step explanation:

First, substitute x = -6y into the top equation:

-6y + 3y = 12

-3y = 12

Divide both sides by -3, and you get:

y = -4

Now, you plug in the y value to the second equation:

x = -6(-4)

x =24

Given :

[tex]{ \longrightarrow\qquad \sf x + 3y = 12 \: –––– \sf \: (i)}[/tex]

[tex]{ \longrightarrow\qquad \sf x = - 6y \: –––– \sf \: (ii)}[/tex]

(i) – (ii) we get :

[tex]{ \longrightarrow \qquad \sf \: {x + 3y -x = 12 - ( - 6y)}}[/tex]

[tex]{ \longrightarrow \qquad \sf \: { \cancel{x} + 3y \: \cancel{ - \: x }= 12 + 6y}}[/tex]

[tex]{ \longrightarrow \qquad \sf \: { 3y - 6y = 12 }}[/tex]

[tex]{ \longrightarrow \qquad \sf \: { - \: 3y = 12 }}[/tex]

[tex]{ \longrightarrow \qquad \sf {- \: y = \dfrac{12}{3} }}[/tex]

[tex]{ \longrightarrow \qquad \bf \: { y = - \: 4 }}[/tex]

Now, Substituing the value of y in equation (i) :

[tex] \longrightarrow \qquad \sf{x + 3( - 4)= 12}[/tex]

[tex] \longrightarrow \qquad \sf{x - 12= 12}[/tex]

[tex] \longrightarrow \qquad \sf{x = 12 + 12}[/tex]

[tex]\longrightarrow \qquad \bf{x = 24}[/tex]

Therefore,

The value of x is 24 .

if I want a PlayStation for $300.00 and I get paid $10.50 a week how long would it take me to buy the PlayStation

Answers

Answer:

29 weeks or 4 months (not exactly)

Step-by-step explanation:

300/10.5 is 28.57

which 29 weeks, you earn 4 dollars and 50 cents left over

Help please! Thank you!

Answers

The correct answer is 20, the other side went from 12-->48 meaning it was a x4 expansion, so the side that was 5 is now 20

Answer:

The answer would be x = 20. First, you must set up a proportion, since you know that the two polygons are similar: 12/48 • 5/x. Then, you have to do cross multiplication which would result in 12x = 240. Afterwards, you must divide both sides by 12, giving you x = 20.

Someone please help me

Answers

Answer:

lemon pie is 7.5 and blueberry is 4.5

Step-by-step explanation:

Graph the image of the given triangle after the transformation with the rule (x, y)→(x+3, y−5).

Select the "Polygon" button from the tool bar to plot your triangle. You may use the "Move" button to move the triangle after it is created.

Answers

Answer:

Step-by-step explanation:

What is the midpoint of the line segment graphed below?

Answers

Answer:

The midpoint is 7/2 -9/2

Step-by-step explanation:

The formula for finding the midpoint of a line is

This means the formula for the x-coordinate of the midpoint is , and the formula for the y-coordinate of the midpoint is .

First, let's find the x-coordinate of the midpoint:

Add the two x values of the coordinates given, then divide that by two.

Next, let's find the y-coordinate of the midpoint:

Add the two y values of the coordinates given, then divide that by two.

Therefore, the midpoint of the line segment is . Hope this helps!

PLEASE HELP


Study the diagram of circle K, where JL and LM are tangent to circle K at points J and M, respectively. Also, JL=3x+10 and ML=7x−6.

What is the length of LM?


17.6

16

4

22

Answers

Answer:

LM = 22

Step-by-step explanation:

Tangents to a circle from an external point to the circle are congruent , that is

ML = JL , substitute values

7x - 6 = 3x + 10 ( subtract 3x from both sides )

4x - 6 = 10 ( add 6 to both sides )

4x = 16 ( divide both sides by 4 )

x = 4

Then

LM = 7x - 6 = 7(4) - 6 = 28 - 6 = 22

-3=2+a/11
pls pls pls help

Answers

Answer:

a=-55

Step-by-step explanation:

-3=2+a/11

-3=1/11 a+2 simplify

flip

1/11 a+2=−3

1/11 a+2−2=−3−2  subtract 2

1/11 a=−5

11*(1/11 a)=(11)*(−5) multpily both sides by 11

a=-55

Someone help, 3x-5+23x-9

Answers

Answer:

26x - 14

Step-by-step explanation:

3x - 5 + 23x - 9

26x - 5 - 9

26x - 14

Answer:

26x - 14

Step-by-step explanation:

3x - 5 + 23x -9

3x +23x - 9 - 5

26x - 14

7. Find the value of x. Round to the nearest tenth of a unit. (2 points)
27°
work:
21
х
X =

Answers

Answer:

41.2

Step-by-step explanation:

By the alternate interior angles theorem, the angle of depression is congruent to the angle of elevation.

This means that tan(27)=21/x.

x(tan 27)=21

x=21/(tan 27), which is about 41.2

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