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Ronch [10]
4 years ago
7

What is -2(x + 7) in math

Mathematics
1 answer:
rewona [7]4 years ago
5 0
Apply the distributive property, which says that a(b+c)= ab+ac.

-2(x+7)= -2(x)+ -2(7)

-2(x)= -2x
-2(7)=-14

Put it together.

Final answer: -2x-14
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A dog pen in the shape of a rectangle is to be built using one wall of a house as a side. If 132 feet
diamong [38]
This is a very poorly written question. im assuming the house wall is at least 130 ft since there is no information given about it.

each set of side lengths has three elements, the long side and the two short sides. we're asked to list all whole number possibilities so start anywhere, the two short sides being 1ft
(1 1 130). the long side has to be the difference of 132 and the length of both short sides.

the area is one of the short sides times the ling side, in the first case 1*130=130 sqft

continuing the list

(2 2 128) area=256
(3 3 126) area=378
(4 4 124) area=496
(5 5 122) area=610

the short sides increase by 1, the long side decreases by 2, the area gets bigger, but the difference between the areas are 4 less each time. dividing the first difference, 122, by 4 will give us a number to make a better guess from.

122÷4=30.5

so lets try

(30 30 72) area=2160

lets try 31 and see if that gives a smaller area

(31 31 70) area = 2170

(32 32 68) area =2176

(33 33 66) area = 2178

(34 34 64) area = 2176

so the area is decreasing now which means the maximum area is found when thw long side is 66 feet and the short sides are 33 feet.

as far as listing all possibilities, you see the pattern i started, i leave the rest to you
6 0
3 years ago
BRAINLIEST AWARDED TO FIRST CORRECT ANSWER NEED ASAP! AND 20 POINTS!! The table shows the cost for taxi rides of various distanc
Elza [17]

Answer:

b because it cost u more for a certain distance

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Please help me as I need this by today
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On the other hand, the line and the parab. at the left do intersect, and the points of intersection are (-3,0) and (6,6).
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Answer:

164 Cm^3

Step-by-step explanation:

Solution

V=

3

3

2

a

2

h

=

3

3

2

3

2

7

≈

163.6788

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DaniilM [7]
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