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Mice21 [21]
3 years ago
8

What does the expression l∙w represent

Mathematics
1 answer:
cluponka [151]3 years ago
4 0
It represents Length times width
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Heidi and Andrew designed two raised flowerbeds for their garden. Heidi's flowerbed was 5 feet long by 3 feet wide, and Andrew's
d1i1m1o1n [39]

Answer:

V=90\ ft^3

Step-by-step explanation:

-Given the two heights are similar:

#Heidi's flowered bed dimensions and volume is calculated as:

v=lwh

=5\times 3\times 2\\\\=30\ ft^3

#The width of Andrew's is twice Heidi's. The width and volume is thus calculated as:

w_a=2\times 3=6 \ ft\\\\V_a=lwh\\\\=5\times 6 \times 2\\\\=60\ ft^3

#Total soil volume of the soil used is determined by summing the two different flowerbed volumes:

V=V_h+V_a\\\\=30+60\\\\=90 \ ft^3

7 0
3 years ago
Can someone help. I’m having trouble with the equation part
mote1985 [20]

Answer:

(x+3) x+7 is the answer for the first question if it's the same way my school does it. Whatever you put in parentheses is the opposite of what you think. + is going to the left. - is going to the right but those only apply when in parentheses.

7 0
3 years ago
There are 8 girls for every 7 boys on a field trip.if there 56 girls on the trip how many students are on the trip
Ket [755]

Well the first thing you need to do is set up a proportion.

8 girls         56 girls                          

--------    =   -----------

7 boys             x


Now what we have to do is find out what we multiplied by 8 to get 56.

Simply divide.

56 ÷ 8 = 7

So, we figured out that the magic number is 7!

So we multiply the boy number by 7

7 x 7 = 49

So this means that there are 49 boys on the field trip.

8 0
3 years ago
I need help please explain how to do these two question as I did the rest of them. I just don't understand these.
Alexxandr [17]

Answer:

7. (4x +10)/(x^3 +3x^2 -16x -48)

9. -320/93

Step-by-step explanation:

7. As with adding any fractions, first you find a common denominator. When the fractions are rational expressions, it often helps to factor the denominators.

6/(x^2 -16) -2/(x^2 -x -12) = 6/((x -4)(x +4)) -2/((x -4)(x +3))

= (6(x +3) -2(x +4))/((x -4)(x +3)(x +4)) . . . . . using a common denominator

= (6x +18 -2x -8)/((x -4)(x +3)(x +4))

= (4x +10)/((x^2 -16)(x +3))

= (4x +10)/(x^3 +3x^2 -16x -48)

_____

9. First you simplify the denominator:

2/25 -5/16 = (2·16 -5·25)/(25·16) = -93/400

Then you perform the division. This can be done by multiplying by the inverse of the denominator.

(4/5)/(2/5 -5/16) = (4/5)·(-400/93) = -320/93

6 0
4 years ago
Is surface area 3-dimensional?
masha68 [24]
Considered as it only taking the area of flat surfaces of a 3D object, no
6 0
3 years ago
Read 2 more answers
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