1 Jeux de plage Georges a acheté un ballon gonflable en forme de
sphère pour ses enfants. Le diamètre de ce ballon
est de 30 cm.
a. Calcule le volume du ballon, arrondi au cm?.
Le diamètre de ce ballon mesure
donc le rayon du ballon est cm.
Le volume d'une boule est donné par la formule
Vpoule =
Ici Vpoule =
soit Vpoule =
cm?
D'où Vpoule
cm' (arrondi à l'unité).
b. À chaque expiration, Georges souffle 500 cm
d'air dans le ballon. Combien de fois devra-t-il
souffler pour le gonfler au maximum ?

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

the correct answer is

c. 4

step-by-step explanation:

the given polynomial is

the degree of the polynomial is the highest exponent which is 4.

the -4 is called the leading coefficient.

this polynomial has only one term so it is a monomial.

the correct answer is option c.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x