I need help I’m meeting with my teachers

Answer:

x = -3 and 7

Step-by-step explanation:

Given the path of a diver expressed as;

h(x) = - 0.5(x^2 - 4x - 21)

The positive zero occur at when h(x) = 0

Substitue

0  = - 0.5(x^2 - 4x - 21)

-0.5x^2 + 2x + 10.5 = 0

Multiply through by -10

5x^2 - 20x - 105 = 0

x^2 - 4x - 21 = 0

x^2 - 7x+3x - 21 = 0

x(x-7)+3(x-7) = 0

(x+3)(x-7) = 0

x = -3 and 7

Hence the positive zero displacement occurs at x = -3 and 7

Answer:

y=1/-4x+4

Step-by-step explanation:

hey

Step-by-step explanation:

Slope (x) is rise/run. From one intersecting point to the next, we find it is moving 4 y down and 1 x over. Using this we conclude the slope is -4/1x (or -4x)

The second number in the system is b, or y-intercept. The line intercepts at 4y. If we combine these together, the outcome is y = -4x + 4

Answer:

D.

Step-by-step explanation:

You can check with this equation 26262(1.04)^12. gets you the same answer as D.

Answer:

C

Step-by-step explanation:

(y2-y1)/(x2-x1) = slope

y2-y1 = (-1)-(-5) = 4

x2-x1 = (-9)-(-1) = -8

slope = 4/(-8) = -0.5

Answer:

15.5 m/s

Step-by-step explanation:

Using the equation, d = ut+1/2gt² where all the variables have meaning as given above, making u subject of the formula, we have

d = ut+1/2gt²

d - 1/2gt² = ut

d/t - 1/2gt²/t = u

u = d/t - 1/2gt

Since d = 200 m, t = 5 s and g = 9.8m/s², substituting the values of the variables into the equation, we have

u = d/t - 1/2gt

u = 200 m/5 s - 1/2 ×  9.8m/s² × 5 s

u = 40 m/s - 49 m/s ÷ 2

u = 40 m/s - 24.5 m/s

u = 15.5 m/s

So, the initial speed of the snowball is 15.5 m/s

Answer: 1. x=3 and y=7

2. x=10 and y=35

3. x=-2/3 y=-2/3 (fraction)

Step-by-step explanation:

Calculate the amount of people on both sides.

32% preferred cats

32% of 800

0.32 × 800 = 256 people

27% preferred dogs

27% of 800

0.27 × 800 = 216 people

So 256 people preferred cats and 216 people preferred dogs.

256 - 216 = 40 people

40 more people preferred cats than preferred dogs

40 people preferred cats more than preferred dog.

Percentage is a measurement to find value of given number out of hundred.

Given that,

Total number of people participated in survey = 800.

Percentage of people who preferred cats = 32%,

And percentage of people who preferred dogs = 27%.

The percentage of  people who preferred cats more than preferred dogs

= 32 - 27

= 5 %

The number of people preferred cats more than preferred dogs

= 800 x 5/100

= 40.

There are 40 more people preferred cats than dog.

To learn more on Percentage:

https://brainly.com/question/24120406

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The complete equation,

5 - 9.5 = 5 - 9.5.

Two algebraic expressions having same value and symbol '=' in between are called as an equation.

Given:

An equation,

5 - 9.5 = 5 + __.

Let the missing number is x.

Simplifying,

-4.5 = 5 + x

x = -9.5

Therefore, the missing term is x = -9.5.

To learn more about the equation;

https://brainly.com/question/12788590

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Answer:

Surface area = 2,160 in²

Step-by-step explanation:

Given:

Length of box = 15 in

Width of box = 30 in

Height of box = 24 in

Find:

Surface area

Computation:

Surface area = 2h[l+b]

Surface area = 2(24)[30 + 15]

Surface area = 48 x 45

Surface area = 2,160 in²

Answer: 36.7

Step-by-step explanation:

4.17 x 10 -5 =

41.7-5

=36.7

Answer:

perimeter-

perimeter outer rectangle = 2 (l+b)

=2×8+9

= 2×17

2×17 =34 cm sq.

perimeter of inner rectangle = 2 (l+b)

= 2×5+3

=2× 8

= 16 cm sq.

perimeter of shaded portion= 34 - 16

= 18 cm sq.

area-

area of inner rectangle =l×b

l×b = 3×5

3×5=15

15 cm sq.

area of outer rectangle =l×b

l×b= 9×8

9×8= 72

72 cm sq.

area of shaded portion = 72 -15 =57 cm sq.

hey there! In second method i have done first area of inner rectangle but you have to do first area of outer rectangle...

hope it helps you....

Answer:

Let A1 = be the large rectangle and A2 the small rectangle

=> Area A1: S1 = a1.b1 => S1 = 8 x 9 = 72m2

=> Area A2: S2 = a2.b2 => S2 = 3 x 5 = 15 m2

=> Area of the remaining surrounding square: S1-S2 = 72-15 = 67m2

=> Perimeter A1: P1 = 2 (a1 + b1) = 2 (9 + 8) = 34m

=> Perimeter A2: P2 = 2 (a2 + b2) = 2 (3 + 5) = 16m

=> Perimeter of the surrounding square: P1-P2 = 34-16 = 18m

Step-by-step explanation:

Answer:

X = 6

Step-by-step explanation:

Am tired 2 show the work

Answer:

=-6

Step-by-step explanation:

Move all terms containing x to the left side of the equation.

x−4=−10

Move all terms not containing x to the right side of the equation.

Add 4 to both sides of the equation.

x=−10+4

Add −10 and 4

X=-6

Answer:

the balance will decreases by 500

-500 represents his account balance  

Step-by-step explanation:

B

C

Answer:

The angle between the two sides of the right triangle is aproximately 31.003º.

Step-by-step explanation:

From image attached on question we infer that we need to find the angle between sides of lengths 6 (adjacent leg) and 7 (hypotenuse) in the right triangle. The angle can be found by means of this trigonometric ratio:

[tex]\cos \alpha = \frac{6}{7}[/tex]

[tex]\alpha = \cos^{-1} \frac{6}{7}[/tex]

[tex]\alpha \approx 31.003^{\circ}[/tex]

The angle between the two sides of the right triangle is aproximately 31.003º.

Answer:

2 1/2

Step-by-step explanation:

since it two halves multiplied, it'd be 2 1/2. you can also mulitpy decimals to get ur answer

breainliest pls

Answer:

We have two expressions, let's see if they are true or not:

A: (9k - 8)*(9k + 8) = 81*k^2 + 64

To prove this, we only need to start in the left side and see if we can construct the right side:

(9k - 8)*(9k + 8) = (9k)*(9k) + (9*k)*8 - (9k)*8 + 8*(-8)

                         = (9k)^2 - 8^2

                         = 9^2*k^2 - 64  = 81*k^2 - 64

This is different than the thing in the original equation, then this one is not an identity.

B) (3m +2n)(6m – 4n) = 18m^2 – 8n

Same as before, we start at the left side and work it out.

(3m + 2n)*(6m - 4n) = (3m)*(6m) + (3m)*(-4n) + (2n)*(6m) + (2n)*(-4n)

                                = 18*m^2  -12*m*n + 12*m*n - 8*n^2

                                = 18*m^2 - 8*n^2

Notice that here we have an "n^2" while in the original equation we have only an "n".

This may be an error in the question and the exponent is missing, in that case, this equation would be an identity, but it is not as how is written in the question.

Then neither A nor B are correct.

Answer:

only b

Step-by-step explanation:

Answer:

world peace, and ending world hunger.  Human kind is far too cruel to fix these areas.

Step-by-step explanation:

Being in space without oxygen has a 0% probability of survival.

Cooking noodles is boiling water has a 0% chance of the noodles not cooking.

These may be odd examples but they are accurate.

-Northstar

Answer:

their will be at least $159

Answer:

b=40 I just took this quiz

Answer:b=40 a=100

Step-by-step explanato a line is 180 degrees, the outside of the triangle is 140 degrees so the inside must be 40 to make 180 and a is also 40 because the triangles sides are the same

to find a we now know that both angles on the bottom 40+40 will add up to 80 and to make a complete triangle we need 180 so the measure of a is 100 degrees

a=100

b=40

Answer:

B. 8cm

Step-by-step explanation:

radius = 4cm

volume = 4/3 π r³

volume = 4/3 *3.14 *4³ (π = 3.14)

volume = 268cm³

hope it is help you

Answer:

t=20

Step-by-step explanation:

delta math blessed.

Answer:

t=20

Step-by-step explanation:

I do not have one, I apologise.

Answer:

She has to ride for 52 minutes!

Step-by-step explanation:

50/8=6.25

325/6.25=52

6.25*52=325

Answer:

52 minutes

Step-by-step explanation:

50/8=6.25

325/6.25=52

6.25*52=325

Answer:

8

Step-by-step explanation:

-3 + 11 = 8

blank = 8

[tex]\huge\purple {\mid {\fbox {\tt {Solution!}}\mid}}[/tex]

[tex] \longmapsto- 3 + 11 \\ \longmapsto8[/tex]

hope it's helpful ❤❤❤❤

THANK YOU.