can someone help me please?

Answer:

x=  −1 /2   or x=4

Step-by-step explanation:

This is ALGEBRA, equations, factoring and zero property. ok.. let's solve this step-by-step

2x^2−7x=4

Step 1: Subtract 4 from both sides.

2x^2−7x−4 =4 −4

2x^2−7x−4=0

Step 2: Factor left side of equation.

(2x+1)(x−4)=0

Step 3: Set factors equal to 0.

2x+1=0 or x−4=0

x=  −1 /2   or x=4

(BTW, there are supposed to be two answers, it's factoring)

Sorry if the format is not clear, but I hope this helped (really feel you, algebra can be brain-striking)!! Please leave a comment, rating and/or mark as the brainliest-whichever you think I deserve! Thank You :)

Answer:

it’s astrolabe

Step-by-step explanation:

Answer:

Angles AXY and YXB are complementary angles because they add up to 90 degrees, which can be inferred by looking at angle BXC.

Answer:

36 gallons

Step-by-step explanation:

y = 4/5x

Let x = 45 minutes

y = 4/5 (45)

y = 36 gallons

Answer:

B. 36

Step-by-step explanation:

Let x = 45

y = 4/5 * (45)

= 4 * 9

= 36

Hope this helps!

Answer:

329.31

Step-by-step explanation:

The total percentage we have to add is

5+7+1+ .75 =13.75 %

Take the cost of the ticket and multiply by the percentage

289.50 * 13.75%

Change to decimal form

289.50* .1375

39.80625

Rounding to the nearest cent

39.81

Add this to the cost of the ticket

289.50+39.81

329.31

Answer:X=15d or just 15

Step-by-step explanation:Since there is an increase in manpower/hours of: [8 x 4] / [6 x 5] = 16/15, therefore, there must be decrease in days by the same pecentage. Or 16 / [16 / 15] =16 x 15/16 =15 days

Answer:

15 days

Step-by-step explanation:

Or you could just write 15 on MathsWatch

Answer:

-80cm/sec

Step-by-step explanation:

It is given that Joe was being exposed to an electro magnet shrinking machine.

Because of this his height started decreasing.

The decrease was at a constant rate per second is given.

In 1.5 seconds, the height decreased by 120 cm.

Since given as constant decrease per second we find that this is direct variation of height over second.

variation per second =

Change in each second would be with negative sign indicating decrease

Answer: -80cm

Step-by-step explanation: khan academy

Answer:

The slope of the line is 5.

The point slope form of the line is y=5x+6.

Step-by-step explanation:

We can find the slope using this formula: [tex]\frac{y_{2} }{x_{2} } -\frac{y_{1} }{x_{1} }[/tex]

[tex]\frac{6}{0} -\frac{9}{-3} =[/tex]

[tex]\frac{6}{0} -(-\frac{9}{3} )=[/tex]

[tex]\frac{6}{0} +\frac{9}{3} =[/tex]

[tex]\frac{15}{3} =[/tex]

5

The slope of the line is 5.

To find point slope form, we use the equation y=mx+b where m is the slope and b is the y-intercept.

The y-intercept of this slope is 6 and the slope is 5 so we get, y=5x+6

Answer:

Step-by-step explanation:

sry bro im confused

Answer:

The graph is a nonlinear function. Michael Jordan's hang time is 0.9 seconds. The maximum height is about 1 meter. For t between t = 0.5 and t = 1, the height is decreasing.

Step-by-step explanation:

Okay the first one: It's nonlinear because its not a line, its a curve and its definitely not constant. The curve on the graph stops at (0.9,0) so his hangtime is 0.9 seconds. The peak of the curve is about 1 meter. Pretty self explanatory. And the last one, after the point 0.5, the height of the curve goes down, so it is decreasing.

Answer:

The graph is a nonlinear function

Michael Jordan's hang time is 0.9 seconds

The maximum height is about 1 meter

For t between t = 0.5 and t = 1, the height is decreasing.

Step-by-step explanation:

Answer:

3rd, 4th, last

Step-by-step explanation:

Answer:

d) 32.4%

Step-by-step explanation:

p(chance of winning general election) = (chance of winning primary)x(chance of winning general) = 60% x 54% = 0.6 x 0.54 = 0.324 = 32.4%

Answer:

D

Step-by-step explanation:

Tan graphs are a bit different to sin and cos graphs: they don't have an amplitude.

If you look at a tan graph, it exists between assymptotes and has no maximum or minimum value. In this case, the 2.5 acts similar to a dilation factor and makes the graph skinnier or wider.

You were right about the period: it is just pi, not 2 pi like sin and cos. Again, if you look at the graph, the assymptotes occur every period, which is only pi.

Hope that helped : )

Answer:

hope this helps you

Answer:

Exactly two distinct zeros

Step-by-step explanation:

y = 2(x-1) (x + 4)

Plug y = 0

0 = 2(x-1) (x + 4)

0/2 = (x-1) (x + 4)

(x-1) (x + 4) = 0

(x-1) = 0 or (x + 4)= 0

x = 1 or x = - 4

Here, x has two distinct roots, therefore given quadratic relation has Exactly two distinct zeros.

Answer:

x=-42/5

Step-by-step explanation:

pls mark me as brainliest

x+7-8x/3=-5x/2

x+5x/2-8x/3=-7

(6x-16x+15x)/6=-7

5x=-42

x=-42/5

Step-by-step explanation:

a) 200,000 equals 2 times 10^5

b) 80,000 equals 8 times 10^4

c) 900,000,000 equals 9 times 10^8

d) 1,000,000,000 equals 1 times 10^9

Answer:

What are the answer choices?

Step-by-step explanation:

Answer:

(1.) w could be 3/4

(2.) w could be 1

(7.)  w >1.5

Step-by-step explanation:

Answer:

We can see from the table that 1 km is exactly half way between 2 and 3 laps. So it will take 2.5 laps to run 1 km. So it takes Angel 5 minutes to run 1 km.

Step-by-step explanation:

Answer:

198

Step-by-step explanation:

between 20 to 100 MEANS THAT WE EXCLUDE 20 AND 100

INTEGER IS POSITIVE AND NEGATIVE NUMBER WHICH IS 21 TO 199 FOR THIS QN WHICH IS 198 IN NUMBER

Answer:

2000 ml of liquid

Step-by-step explanation:

1l plus 1l will equal 2l.

1 liter consists of 1000 milliliters ("milli" means thousand).

If 1l had 1000ml, 2l will have 2000ml.

So 2000mlnis the answer

Answer:

El soluccion es 20m.

Step-by-step explanation:

Para encontrar la base major necesitas saber el area, la altura, y el base menor.

Puedes usar la formula para la area de un trapecio: [tex]A=\frac{a+b}{2} *h[/tex]

Pero se puede cambiar por lo que es en términos de encontrar la base más grande:

[tex]b=2\frac{A}{h} -a\\A=Area\\h=altura\\a=base-menor\\b=base-major[/tex]

Y si conectas las variables que conoces, siempre podrás encontrar la que no tienes

[tex]b=2\frac{120}{8} -10\\b=20[/tex]

Answer:

82 minutes.

Step-by-step explanation:

So first calculate the percentage 37 minutes is. It is 45%

Next find how much 1% is.

Divide by 45.

[tex]\frac{37}{45}[/tex]

Multiply by 100 to find how much the whole time is: [tex]\frac{3700}{45}[/tex]

The decimal version is: 82.2222222222...

Which simplifies to 82 minutes.

Answer:

82 mins

Step-by-step explanation:

percentage of pages she has already read

100-55= 45%

45%----------- 37mins

55%------------ x mins

x =( 37× 55)/45

x= 45.22 mins

approximately x=45 mins

The time for reading assignment is 37mins + 45 mins = 82 mins.

Answer:

X=0 or x=-5

Step-by-step explanation:

[tex] {x}^{2} + 5x = 0 \\ x(x + 5) = 0[/tex]

X=0 or x+5=0 => X=-5

Hope this helps..

Answer:

10

Step-by-step explanation:

Spinner divided to 5 equal parts

It is Numbered from (1 to 5): 1, 2, 3, 4, 5

Theoretical probability of spinning 1 = 1/5

Number of times it is spun = 50

Let Experimental probability of spinning 1 = x

1/5 = x/50

5x = 50

x = 50/5

x = 10

Experimental probability of spinning 1 = 10

Answer:

10

Step-by-step explanation:

Answer:

x = 7

Step-by-step explanation:

8x - 2y = 48

Let y=4

8x - 2(4) = 48

8x -8 = 48

Add 8 to each side

8x -8+8 = 48+8

8x = 56

8x/8 = 56/8

x = 7

Answer:

Probability that X <32 degrees

[tex]=P(Z<\frac{32-22}{6}) =P(Z<1.67)\\ = 0.9522[/tex]

Convert this into percent by multiplying by 100

95.22% of days in February has minimum temperatures below freezing (32 degrees Upper F )​

Step-by-step explanation:

Given that a city's mean minimum daily temperature in February is 22 degrees Upper F, with std deviation 6 degrees.

Let X be the minimum temperature in February

Then X is N(22,6)

To calculate  percentage of days in February has minimum temperatures below freezing (32 degrees Upper F )

Probability that X <32 degrees

[tex]=P(Z<\frac{32-22}{6}) =P(Z<1.67)\\ = 0.9522[/tex]

Convert this into percent by multiplying by 100

95.22% of days in February has minimum temperatures below freezing (32 degrees Upper F )​

Answer:

B

Step-by-step explanation:

45-45-90 triangles have the ratio 1:1:sqrt(2) on their sides

20sqrt(2):20sqrt(2):20(2)/40 satisfies this ratio