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Furkat [3]
3 years ago
12

Solve for x. 21x + 11 - 5 = 5

Mathematics
2 answers:
nydimaria [60]3 years ago
6 0

Answer:

x=-1

Step-by-step explanation:

21x+11-5=5

21x+6=5

     -6  -6

21x=-1

21    21

x=-1

Reil [10]3 years ago
3 0

Answer:

x= -1/21

Step-by-step explanation:

21x + 11 - 5 = 5

21x + 6 = 5

(-6 each side)

21x = -1

(divide 21 each side)

x= -1/21

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Find a “solution” for an equation with two variables. Tell me an x, y ordered pair that is a solution (answer) for this equation
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Answer:

Step-by-step explanation:

A graph has a constant of proportionality of 7.2. Let y represent minutes and x represent miles.

What is the unit rate of the relationship?

Enter your answer, as a decimal, in the box

min/mi

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4 0
3 years ago
This question is down below. The picture attached below. <br> Thanks.
Ostrovityanka [42]

The vendor has to sell 88 gingerbread houses to earn a profit of $665.60 and there is no chance that the vendor will earn $1500.

Given an equation showing profits of A Christmas vendor as

P=-0.1g^{2}+30g-1200.

We have to find the number of gingerbread houses that the vendor needs to sell in order to earn profit of $665.60 and $1500.

To find the number of gingerbread houses we have to put P=665.60 in the equation given which shows the profit earned by vendor.

665.60=-0.1g^{2}+30g-1200

0.1g^{2}-30g+1200+665.60=0

0.1g^{2}-30g+1865.60=0

Divide the above equation by 0.1.

g^{2}-300g+18656=0

Solving for g we get,

g=[300±\sqrt{(300)^{2}-4*1*18656 }]/2*1

g=[300±\sqrt{90000-74624}]/2

g=[300±\sqrt{15376}]/2

g=(300±124)/2

g=(300+124)/2       , g=(300-124)/2

g=424/2,  g=176/2

g=212,88

Because 212 is much greater than 88 so vendor prefers to choose selling of 88 gingerbread houses.

Put the value of P=1500 in equation P=-0.1g^{2}+30g-1200.

-0.1g^{2}+30g-1200=1500

0.1g^{2}-30g+1500+1200=0

0.1g^{2}-30g+2700=0

Dividing equation by 0.1.

g^{2}-300g+27000=0

Solving the equation for finding value of g.

g=[300±\sqrt{300^{2} -4*1*27000}]/2*1

=[300±\sqrt{90000-108000}] /2

=[300±\sqrt{-18000}]/2

Because \sqrt{-18000} comes out with an imaginary number so it cannot be solved for the number of gingerbread houses.

Hence the vendor has to sell 88 gingerbread houses to earn a profit of $665.60 and there is no chance that the vendor will earn $1500.

Learn more about equation at brainly.com/question/2972832

#SPJ1

7 0
1 year ago
(8.166×10^8)×(1.515×10^9)
loris [4]
The answer is ....1.237149 x 10^18
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3 years ago
In the chemistry lab an experiment requires 500 mL of one ingredient to be mixed with 1000 mL of another. How many ounces is the
Shalnov [3]

Answer:

51

Step-by-step explanation:

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= 51 fluid ounces

3 0
3 years ago
Read 2 more answers
Please help I am struggling really bad thank you so much
Pavlova-9 [17]

Answer:

1) A

2) A

3) C

Step-by-step explanation:

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