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myrzilka [38]
3 years ago
8

Un bloc de la ville de New York a été représenté dans une grille. Chaque case contient un immeuble de

Mathematics
1 answer:
Andreas93 [3]3 years ago
4 0

Step-by-step explanation:

nznnzznsnsnsnnsnznxnxzmsksk

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Helpppppppppppppppppppp!
Advocard [28]

It looks like this is a square pyramid net, and to find the surface area you need to know the base and height. By looking at the image 5 ft is the height and the base is 3 ft.

The surface area of the square pyramid is <u>40.32</u>

hope this helps!

5 0
3 years ago
PLZ HELP OR I FAIL MY TEST
Volgvan

Answer:

time upstream=24/8=3 hours

time downstream=24/12=2 hours

Step-by-step explanation:

If R*T=D, and R is speed + or - current, how can you find the rate without the time, and how can you find the time without the rate?

THE KEY WAS WHEN WE WERE TOLD THAT IT TAKES ONE HOUR LONGER TO GO UPSTREAM THAN DOWNSTREAM BECAUSE T=D/R AND WE ARE TOLD THAT:

D/R(Upstream) minus 1 equals D/R (DOWNSTREAM)



Let x=rate of current

distance(d)=rate(r) times time(t) or d=rt or t=d/r

distance upstream=distance downstream=24 mi

rate upstream=10-x

rate downstream=10+x

time upstream=(distance upstream)/(rate upstream)=24/(10-x)

time downstream=(distance downstream)/(rate downstream)=24/(10+x)

Now, we are told that time upstream minus one hour equals time downstream. So our equation to solve is:

24/(10-x)-1=24/(10+x) Multiply both sides by (10-x)(10+x)

24(10+x)(10-x)/(10-x)-1(10-x)(10+x)=24(10-x)/(10+x)/(10+x) clear fractions


24(10+x)-(10-x)(10+x)=24(10-x) clear parens

240+24x-100-10x+10x+x^2=240-24x subtract 240 from and add 24x to both sides

240-240+24x+24x-100+x^2=240-240-24x+24x collect like terms

x^2+48x-100=0 ----------------quadratic equation in standard form

This equation can be factored:

(x+50)(x-2)=0

x=-50 mph----------------discount the negative value for speed

and

x=2 mph----------------------speed of the current

CK

10-x=10-2= 8 mph -----------------------speed upstream

10+x=10+2=12 mph--------------------------speed downstream

time upstream=24/8=3 hours

time downstream=24/12=2 hours

so 3-2=1----takes 1 hour longer upstream

7 0
3 years ago
The points (k, -8) and (8,0) fall on a line with a slope of 8. What is the value of k?<br> k=
liberstina [14]
K=h bacuse its. dhhhhgggggggdggdgdgddggdbdhejjejehshshsbsbsbs
6 0
3 years ago
7) Which statement about perpendicular lines is true?
agasfer [191]

Answer:

is the a. Perpendicular lines form 90° angles.

3 0
2 years ago
Read 2 more answers
Find the value of x.
miss Akunina [59]

Answer:

x = 26

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the given angles and equate to 180

55 + 4x - 5 + x = 180, that is

50 + 5x = 180 ( subtract 50 from both sides )

5x = 130 ( divide both sides by 5 )

x = 26

4 0
3 years ago
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