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Nitella [24]
2 years ago
8

Seven less than three times a number is 5. Find the number

Mathematics
2 answers:
Anit [1.1K]2 years ago
7 0

Step-by-step explanation:

it is 12 because 12 - 7 is 5 the number 4 is the number multiplied by 3

bagirrra123 [75]2 years ago
5 0

<u>Answer</u>:

the number is 4

<u>Explanation</u>:

let the number be b :)

3b - 7 = 5       { three times a number; seven less of that number; is 5 }

3b = 5 + 7      { changed sides }

3b = 12          { divide both sides by 3 }

b = 4              { final answer }

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A local store ordered a shipment of video game systems. The store sells 30 systems weekly to customers.
xxMikexx [17]

Answer:

the correct answer is A,D,E

Step-by-step explanation:

3 0
3 years ago
Timmy is helping his grandpa on his chicken farm. Timmy has to pack 66 eggs into cartons, minimizing the packing cost. He can us
Orlov [11]

The way to distribute the eggs at the lowest cost would be using 5 cartons of 12 eggs and 1 carton of 6 eggs.

Since Timmy is helping his grandpa on his chicken farm, and he has to pack 66 eggs into cartons, minimizing the packing cost, and he can use 12-egg cartons and 6-egg cartons, and two 12-egg cartons cost as much as three 6-egg cartons, to determine how many cartons of each should be used, the following calculation must be performed:

  • 2 x 12 = 3 x 6
  • 24 = 18
  • Thus, assuming as an example that a total of 2 cartons of 12 eggs and 3 cartons of 6 eggs cost $ 3, the value of each carton would be the following:
  • 3/3 = 1
  • 3/2 = 1.5  
  • 66/12 = 5.5
  • 5 x 1.5 + 1 x 1 = X
  • 7.5 + 1 = X
  • 8.5 = X

In this way, the way to distribute the eggs at the lowest cost would be using 5 cartons of 12 eggs and 1 carton of 6 eggs.

Learn more in brainly.com/question/4397825

5 0
2 years ago
Select "Rational" or "Irrational" to classify each number.
dalvyx [7]

Answer:

Step-by-step explanation:

0.144 rational

√(0.144)  irrational

√(0.0144)=0.12 rational

8 0
3 years ago
What is the value of the expression below when y= 8 and z= 9?
g100num [7]

Answer:

27

Step-by-step explanation:

5y-2z

1.plug in

5(8)-2(9)

2.solve

5(8)=45

3.solve

2(9)=18

4.subtract

45-18=27

___________________________

answered by aurinda

hope it helps:)

____________________________

4 0
2 years ago
A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui
Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= \frac{dx}{dt}=1. 8 m/s

\triangle ABD\sim\triangle ECD

Therefore, \frac{AB}{EC}=\frac{BD}{CD}

\frac{y}{2}=\frac{12}{x}

xy=24

Differentiate w.r.t t

x\frac{dy}{dt}+y\frac{dx}{dt}=0

x\frac{dy}{dt}=-y\frac{dx}{dt}

\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}

When the man is 4 m from  the building

Then, we have x=12-4=8 m

\frac{dx}{dt}=1.8 m/s

Substitute the values in above equation then, we get

8y=24

y=\frac{24}{8}=3

Substitute the values then we get

\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0
3 years ago
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