Mathematics High School

The track team is trying to reduce their time for a relay race. First, they reduce their time by 2.1 minutes. They are able to reduce that time by 1/10. If their final time is 3.96 minutes, what was their beginning time?
HELPPPP

Answers

Answer 1

Answer:

Answer is 15.7 minutes.

Step-by-step explanation:

I hope it's helpful!

The Track Team Is Trying To Reduce Their Time For A Relay Race. First, They Reduce Their Time By 2.1
Answer 2

Answer:

6.5 minutes

Step-by-step explanation:

T0 = initial time

T1=T0 - 2.1

T2=T1 x 0.9= 3.96

T1 = 3.96/.9= 4.4

T0=T1+2.1=6.5

(note the 1/10 reduce is shown as 9/10)

Related Questions

if eight times a number is increased by 3 the result is 19 more than six times this digit. find the number

Answers

Answer:

8

Step-by-step explanation:

Even though we don't know the number yet, let's name this number "n".

8n + 3 = 6n + 19

8n + 3 - 6n = 6n + 19 - 6n

2n + 3 = 19

2n = 16

n = 16/2

n = 8

Our number is 8.

Note: This answer is 100% correct.  

How do you solve this equation

2x+5y=-2

-2x-7y=6

Answers

Answer: x=4, y=-2

For this system of equations, we can use the elimination method, where two variables from both equations will cancel our (in this case, 2x and -2x.

Adding the equations gives us -2y=4, where solving for y gives us -2.

Plugging -2 into any of the two equations and solving for x will result in x=4.

Simplify each expression by combining like terms -14w+10w-11+2w

Answers

Answer:

−2 − 11

Hope it helps!!

-2w -11

You need to combine all the terms that have a w and then combine all the terms without a w

How would you find the following shapes volume?

Answers

Answer:

calculate the volume of big semi Circle and then Subtract the volume of small semi circle from big semicircular

Step-by-step explanation:

The basic formula for volume is length × width × height.


Use the net to find the total surface area of the rectangular prism.

Answers

Answer:

a. 46m²

Step-by-step explanation:

To find surface area, we must calculate each of the rectangular prism's faces and add them.

1 × 5 = 5

1 × 5 = 5

3 × 5 = 15

3 × 5 = 15

1 × 3 = 3

1 × 3 = 3

5 + 5 + 15 + 15 +3 + 3 = 46

a. 46 m²

Write an integer for the basement floor is 12 feet below the ground?

Answers

Answer:

-12 easy dubs

Step-by-step explanation:

easy

An integer to represent 12 feet below the ground would be -12.

could you please help solve 5.a and 5.b

Answers

Answer:

      Step-by-step explanation:

5a = 240.96

5b = 20.08

WILL GIVE BRAINLIEST! PLS HELP!!!
In a model of a house, 1.5cm = 50m. What does the house's length (4.2cm) equal?

Answers

Answer: 140m

Step-by-step explanation:

Can somebody help me?

Answers

Answer:

3rd one

Step-by-step explanation:

the answer is the third one

Three vertices of parallelogram WZXY are W(-5, 2), X(2, 4) and Z(-7, -3). Find the coordinated of the vertex, Y.

Answers

Answer:

[tex]Y = (4,9)[/tex]

Step-by-step explanation:

Given

[tex]W(x_1,y_1) = (-5, 2)[/tex]

[tex]Z(x_4,y_4) = (-7, -3)[/tex]

[tex]X(x_2,y_2) = (2, 4)[/tex]

Required

Find Y

To do this, we make use of the mid-point formula

i.e.

[tex]M = \frac{1}{2}(x_n+x_m,y_n+y_m})[/tex]

WX and ZY are the diagonals of the parallelogram.

The mid-point of WX is:

[tex]M = \frac{1}{2}(-5+2,2+4)[/tex]

[tex]M = \frac{1}{2}(-3,6)[/tex]

The mid-point of ZY is:

[tex]M = \frac{1}{2}(-7+x,-3+y)[/tex]

Equate both values of M

[tex]\frac{1}{2}(-3,6) = \frac{1}{2}(-7+x,-3+y)[/tex]

Multiply both sides by 2

[tex](-3,6) = (-7+x,-3+y)[/tex]

By comparison:

[tex]-7 + x = -3[/tex]

[tex]-3 + y = 6[/tex]

[tex]-7 + x = -3[/tex]

[tex]x = 7 -3[/tex]

[tex]x = 4[/tex]

[tex]-3 + y = 6[/tex]

[tex]y = 6 +3[/tex]

[tex]y = 9[/tex]

Hence:

[tex]Y = (4,9)[/tex]

Best answer, best brainliest worth 20 point

Answers

Answer:

Answer choice A

The answer is A hope this helps you !!!

what is the answer 25−12÷[(8−5)×1]

Answers

Answer:

21

Step-by-step explanation:

:)))

PLEASE HELP ME SOLVE THIS ASAP.
Determine the solution to the System of equations below by using the ELIMINATION METHOD. Show your work

3x+2y=28
x+2y=8

Answers

Answer: (10, -1)

Step-by-step explanation:

Subtract the bottom equation from the top to get:

2x=20

X=10

Plug on for X , y= -1

The rule for reflection over the y-axis is (x, y) --> _ (-x, y) (-x, y) (y, x) (y, x) (x, -y) (x, -y) (-y, x)

Answers

Answer:

see explanation

Step-by-step explanation:

under a reflection in the y- axis

a point (x, y ) → (- x, y )

Answer:

Step-by-step explanation:

(x,y)-->(-x,y)

Simplify: 5a + 1r + 2a + 4r

Answers

Answer:

7a+5r

Step-by-step explanation:

5a + 1r + 2a + 4r

add like terms

7a+5r

hope that helps

what is 4 1/2 times 4 2/3

Answers

Answer:

21

Step-by-step explanation:

Answer:

21 is the answer. hope this helps ✌

If gh = 31 and hi = 11, then gi

Answers

ANSWER=42

HOPE THIS HELPS YOU :)

comparing functions worksheet

Answers

Answer:

?

Step-by-step explanation:

Write an equivalent expression to 3(2x + 4y) + 3x- 6y

Answers

Answer:

9x - 6y

Step-by-step explanation:

3(2x + 4y) + 3x- 6y

6x + 3x - 6y

9x - 6y

Across which axis the two points are reflections of eachother (2,7) and (-2,7)

Choices :

A: x-axis
B; y-axis

Answers

Y-axis because (2,7) is one the right and (-2,7) is on the left

A banana costs three times as much as an apple. The total cost of 1 banana and 1
apple is $1.60. If a represents the cost of 1 apple, which equation could you use to
find a?

Answers

Answer:

banana cost 1.20 and the apple cost 0.4

Step-by-step explanation:

1.60 divided by 4 = 0.4 and the cost of apples

1.60 - 0.4 = 1.2 and the cost of bananas

since the banana cost three times you divide by two and subtract that number from the total cost to get three times the amount of the apples price. hope this helped sorry for my spelling

Answer:

Step-by-step explanation:

6% of x = 600. Find the value of x.​

Answers

Answer:

x=36

I hope this is correct and I hope that it helps

Answer:

the answer is 10,000

Step-by-step explanation:

to find 1%, 600/6

=100 is 1%

100x100

=10,000

You welcome

What is 11/2 subtracted by 11/3​

Answers

Answer:

11/6

Step-by-step explanation:

Answer:

1 5/6

First make it a mixed number. 11/2=5 1/2. 11/3=3 2/3. Next, you find the common denominator. 2 and 3 are both multiples of 6. You multiply 11x3=33, 2x3=6, 11x2=22 3x2= 6. Your new numbers are 5 3/6 and 3 4/6. Now you subtract. 5-3=2, but you have to regroup, so you end up with 1. 9/6-4/6=5/6. 1+5/6=1 5/6

solve using the quadratic equationX^2 -4x -3 =0

Answers

Answer:

[tex]x = 2[/tex] ± [tex]\sqrt{7}[/tex]

Step-by-step explanation:

Lets see the quadratic equation :

x = -b ± [tex]\sqrt{b^2 - 4ac}[/tex] / 2a

So now we have our quadratic :

[tex]x^2 - 4x - 3 =0[/tex]

a = ?^2 (Exponent)

b = ?x   (Variable)

c = ?     (Constant)

So replace every variable in the quadratic equation with the ones in the quadratic formula.

x = -(-4) ± (-4)^2 - 4(1)(-3) / 2(1)

(Imagine (-4)^2 - 4(1)(-3) in a square root)

x = 4 ± [tex]\sqrt{16 - - 12}[/tex] / 2

x = 4 ± [tex]\sqrt{28}[/tex] / 2

Of course 28 isn't available for a square root property, so lets break it up :

x = 4 ± [tex]2\sqrt{7}[/tex] / 2

Simplify the radical :

[tex]x = 2[/tex] ± [tex]\sqrt{7}[/tex]

^^^

A student buys
6
music albums and
4
video games. The cost of
1
video game is
$
16
more than the cost of
1
music album.

If the student spends exactly
$
164
, what is the cost of each music album?

Answers

Answer: 10$

Step-by-step explanation:

164 - 4x16 = 100

6 + 4 = 10

100 : 10 = 10

i sold 43 pounds of cans and they gave me 23.65 dollars how much would i make if i sell 200 pounds

Answers

Hai!

You would make 110$

Brainliest maybe?

15q – 4r = 62
5q + 8r = 86

Answers

Answer:

q = 6; r = 7

Step-by-step explanation:

Using the slope formula above, find the slope of the line between two points.

Answers

Answer:

Undefined

Step-by-step explanation:

Y2-y1/x2-x1

8-(-2)/5-5

10/0. Slope is undefined

Sarah can run 5 miles in 60 minutes. Find Sarah’s speed in minutes per mile.

Answers

Answer:

d= r*t

d= 5 mi/hr * 5 min * (1/60) hr/min

= 5/12 mi

---------------

Notice how including the units makes it clear that you have divided when you should have multiplied.

Step-by-step explanation:

how do i answer this question

Answers

Answer:

a = 2, -7

Step-by-step explanation:

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