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Zepler [3.9K]
3 years ago
9

Please answer only questions 18 and 20 please help me ​

Mathematics
2 answers:
PolarNik [594]3 years ago
7 0
You do 8 x 7 answer divided by 7 answer times by 8 for 18
olga nikolaevna [1]3 years ago
4 0

Answer:

18 is 64 days

20 is 1 37/128

Step-by-step explanation:

I looked it up if I am being completely honest with you but it should be correct

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The area of a rectangle is 54 m2 , and the length of the rectangle is 3 m more than twice the width. find the dimensions of the
Elina [12.6K]
L = 3 + 2w

Find the width
Area = 54
l × w = 54
(3 + 2w) × w = 54
3w + 2w^2 = 54
2w^2 + 3w - 54 = 0
(2w - 9)(w + 6) = 0
w = 9/2 or w = -6 (width shouldn't be negative)
w = 9/2
w = 4.5 m

Find the length
l = 3 + 2w
l = 3 + 2(4.5)
l = 3 + 9
l = 12 m

The width is 4.5 m, the length is 12 m
6 0
3 years ago
6. What is the greatest common factor of 12wr2 + 6wr – 6w ?
balandron [24]

Answer:

a

Step-by-step explanation:

5 0
3 years ago
At a hot dog stand they serve regular hot dogs and footling hot dogs at a ratio of 5 to 3. Based on this ratio how many footlong
natta225 [31]
Answer:
45
Step-by-step explanation:
Ratio is 5:3
So total ratio "parts" is 5 + 3 = 8
In total there are 120 dogs served, so each part is:
120/8 = 15 dogs
Since, footlong hot dogs are "3" parts, and each part is 15 dogs, there will be:

3 * 15 = 45 footlong hotdogs
3 0
3 years ago
Sandra wants to buy a dress that is on sale for 20% off. Sandra also gets a 5% discount for being a member of the store's buyer'
Paraphin [41]
0.25c - that’s 25% off the cost (c) of the dress
7 0
2 years ago
A dance club ordered shoes for all of its members. The shoe sizes are shown in the table.
Kamila [148]
The sample mean is the sum of the sample values divided by the number of them:
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The sample mean is 7.7.
5 0
3 years ago
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