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Dmitrij [34]
3 years ago
11

Mary runs 4 laps in 8 mins. Nicole runs 12 laps in 18 mins. Who runs faster

Mathematics
1 answer:
Georgia [21]3 years ago
6 0
Find to LCM of 8 and 18 to compare times

Mary: 4*9laps/8*9min
36 laps/ 72 mins
Nicole: 12*4laps/18*4 mins
48 laps/ 72 mins

Nicole runs more laps in the same amount of time as Mary

Therefore, Nicole runs faster
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Jennifer Lopez met her 9 cousins at a family reunion. The number of male cousins (x) was 2 less than the number of females cousi
vesna_86 [32]
We define the variables first:
 x = number of male cousins
 y = number of females cousins
 We write the system of equations:
 x + y = 9
 x = y-2
 We solve the system:
 Equation 1:
 x + y = 9
 (y-2) + y = 9
 2y-2 = 9
 y = 11/2 = 5.5
 Equation 2:
 x = 5.5-2
 x = 3.5
 Answer:
 Although physically it does not make sense, mathematically the answer is:
 number of male cousins = 3.5
 number of females cousins = 5.5
6 0
3 years ago
Suppose that y is directly proportional to x and that y = 10 when x = 3. Complete parts (a) and (b). (a) Find the constant of pr
Yuliya22 [10]

For this case we have that if "y" varies directly with "x", then it is true that:

y = kx

Where:

k: It is the constant of proportionality

We have according to the data that:

10 = k (3)

We find the value of "k":

k = \frac {10} {3}

Having "k", we find "y" when x = 6:

y = \frac {10} {3} (6)\\y = \frac {60} {3}\\y = 20

ANswer:

k = \frac {10} {3}\\y = 20

4 0
3 years ago
En la figura a:b = 5:3 y c = 15. ¿Cuánto mide el trazo d?<br><br> a) 1 b) 7 c) 9 d) 15 e) 25
LuckyWell [14K]
Yo me voy con c) 9
porque c is igual a ax3= 5x3
pienso que d deveria ser igual a bx3= 3x3
espero te ayude yo no lo estudie en espanol y pienso que cada pais nos ensena differente y perdon por mi espanol pero mi teclado es differente. :)
7 0
3 years ago
Slope=-2 Passing through (3,5) write the equation of the line in slope intercept form
padilas [110]
Let's use the point-slope formula here:

y - 5 = -2(x - 3).  That's it.  You could, of course, rewrite this in slope-intercept form, as follows:

y = 5 - 2x + 6,   or   y = -2x + 11, in slope-intercept form.
5 0
4 years ago
Here u could answer and get the points but it'll be cool if u give an actual answer too:)
Ratling [72]

Answer:I Both functions have a negative rate of change

Step-by-step explanation:

hannah starts w 27 and JAnya with 40

hannah takes three and Jay a takes 5 day

day four Hannah has 15 left and Jayne has 24ish

3 0
3 years ago
Read 2 more answers
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