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3 years ago

I cant figure it out, and if I get this wrong I fail the test

Mathematics

2 answers:

Scorpion4ik [409]3 years ago

7 0

Answer:

$\frac{40}{33}$

Step-by-step explanation:

hope it helpsss:-)

Oliga [24]3 years ago

3 0

Step-by-step explanation:

x = 1.21212121.....

100x = 121.21212121...

Therefore 99x = 120 and x = 120/99 = 40/33.

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What is 1/10 of 30000

nevsk [136]

1/10 of 30000 is 3000 because 30000 divided by 10 is 3000.

8 0

3 years ago

Read 2 more answers

(5,-6) and (4,3) find the slope

klio [65]

Answer:

$\displaystyle m = -9$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)
Slope Formula: $\displaystyle m = \frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Identify

Point (5, -6)

Point (4, 3)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute in points [Slope Formula]: $\displaystyle m = \frac{3--6}{4-5}$
[Fraction] Subtract: $\displaystyle m = \frac{9}{-1}$
[Fraction] Divide: $\displaystyle m = -9$

3 0

3 years ago

A car dealership decreased the price of a certain car by 6%. the original price was $14,600

choli [55]

Well, I am going to assume that your question is asking for the new price of the car after the original price was decreased so here I go...

SOLUTION:

New price = Original price × ( 100% - decrease % )

New price = $14, 600 × ( 100% - 6% )

New price = $ 14, 600 × 94%

New price = $13, 724

Therefore, the answer is:

$13, 724

6 0

3 years ago

Deshawn fuels 2 yachts and 6 barges. Each boat gets 126 gallons of fuel. To find out how much fuel he needs for all boats, desha

Maslowich

Since there are 8 boats (2 yachts + 6 barges) the three partial products would be as follows:
100 * 8
20 * 8
6 * 8
These are from taking the gallons of fuel for each boat that are needed and breaking it into the place values.
(100*8) + (20* 8) + (6*8) =
800+160+48=
1008 gallons of fuel are needed.

Read more on Brainly.com - brainly.com/question/5990003#readmore

5 0

3 years ago

At time t = 0, a football player kicks a ball from the point A with position vector (2i + j) m on a horizontal football field. T

Strike441 [17]

Answer:

a) 9.434 m/s

b) i (2+5*t) + (1+8*t-4.905*t²) j

c) t= 8/5 secs

d) 3.598 m/s

e) See explanation

Step-by-step explanation:

Part a)

The speed of the ball can be calculated from the given velocity v = 5i +8j

Taking magnitude of v = 5i + 8j

magnitude (v) = $\sqrt{5^2 + 8^2}$ = 9.434 m/s.

Part b)

Using kinematic equation of particle as follows:

Sf = Si + Vi*t + 0.5*a*t² ..... Eq 1

Given: Si = (2i + j) m ; Vi = (5i+8j) m/s; a = -9.81 j m/s²

We evaluate Eq 1:

Sf = (2i+j) + (5i+8j)*t + 0.5*(-9.81j)*t²

We get after combining similar terms:

Sf = i (2+5*t) + (1+8*t-4.905*t²) j ..... Eq 2

Part c)

Using kinematic equation of particle only in i axis as follows we use Eq 1:

Sf = Si + Vi*t + 0.5*a*t²

Given: Si = 2 m ; Sf = 10; Vi = 5 m/s; a = 0;

We evaluate Eq 1:

10 = 2 + 5*t - Solve for t

t = 8/5 seconds

Note: The above is the time t when the ball is due north of (10i+7j) i.e having a position vector of 10 in east direction but unknown in north direction. A point directly above or below 10i + 7j.

Part d)

The interception of ball and the player occurs at the same t = 8/5 secs and @ position vector (10i + aj) where a is a constant needs to be found.

Find a:

Using Eq 2 found in part b:

Sf = i (2+5*t) + (1+8*t-4.905*t²) j

Evaluate @ t= 8/5 secs

Sf = (10) i + (1.2432) j .... Eq 3

To find the speed v of the player when he intercepts the ball at Sf = (10) i + (1.2432) j is evaluated as follows:

v = change in position of player / Time

$v =\frac{Eq 3 - (10i+7j)}{1.6}$

Hence, v = -3.598 j = 3.598 m/s

Part e)

Friction between the ball and surface from which is launched.

4 0

3 years ago