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3 years ago

Please help!!:

Mathematics

1 answer:

LenKa [72]3 years ago

5 0

Answer:

Step-by-step explanation:

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In a 5 km race, Anna swims 450 m, then runs 800 m. She then cycles the rest of the race. How many kilometres does she cycle?

Umnica [9.8K]

5km = 5000 meters
450m+800m= 1250m
5000m-1250m= 3,750m
3 3/4 km

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4 years ago

What are the solutions to the system of equations graphed below?

Lelu [443]

Answer:

Step-by-step explanation:

The solution to a system of equations given graphically is at the points of intersection of the 2 graphs.

These occur at (4, 8 ) and (0, - 8 ) → D

4 0

3 years ago

How to turn this equation: y= -1.02(x-3)^2+9.25 into factored form

MatroZZZ [7]

Answer:

$y=(102x-306-5\sqrt{3774})(102x-306+5\sqrt{3774})$

Step-by-step explanation:

You first equate it to zero to get:

$-1.02(x-3)^2+9.25=0$

Then solve using square root method

$-1.02(x-3)^2=-9.25$

$(x-3)^2=\frac{-9.25}{-1.02}$

$(x-3)^2=\frac{925}{102}$

$x=3\pm\sqrt{\frac{925}{102}}$

$x=3\pm{\frac{5\sqrt{3774}}{102}}$

$x={\frac{306\pm5\sqrt{3774}}{102}}$

Now work it backwards

$102x-(306\pm5\sqrt{3774})=0$

$(102x-306-5\sqrt{3774})(102x-306+5\sqrt{3774})=0$

Hence the factored form is:

$y=(102x-306-5\sqrt{3774})(102x-306+5\sqrt{3774})$

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%2072" id="TexFormula1" title="\sqrt{x} 72" alt="\sqrt{x} 72" align="absmiddle"

AveGali [126]

Answer:

Step-by-step explanation:

√x^72 = √(x^36)^2 = x^36

4 0

3 years ago

Find the area of the polygon with E(-3,2), F(1,5), G(5,-1), H(1,-5).

kykrilka [37]

Answer:

Step-by-step explanation:

-3 2

-15 - 2 = -17

1 5

-1 - 25 = -26

5 -1

-25 - (-1) = - 24

1 -5

2 - 15 = -13

-3 2

area = |-17 - 26 - 24 - 13|/2 = |-80|/2 = 80/2 = 40

Answer: 40

6 0

3 years ago