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3 years ago

If the product of a number and -4 is subtracted from the number, the result is 3 more than the number. Find the number

Mathematics

2 answers:

masha68 [24]3 years ago

6 0

Answer: 0.75 or 3/4

lesya [120]3 years ago

3 0

Answer: The number is 0.75 or 3/4

Step-by-step explanation:

let x = the number.

Now set up an equation: The product of a number (x) and -4 = -4x. So -4x is subtracted from the number - x. x-(-4x)

Then, that equals 3 more than the number (x) = x+3

So the equation is x-(-4x)=x+3.

Then, solve the equation!

x-(-4x)=x+3

x+4x=x+3 (Distribute the negative to the parentheses)

5x=x+3 (Combine like terms)

4x=3 (Get the Xs on one side by subtracting x from both sides)

x=0.75 or 3/4 (divide by the coefficiant, 4, on both sides)

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Evaluate a + 4 a+4a, plus, 4 when a = 7 a=7a, equals, 7.

Scilla [17]

When evaluating $a=7$ then we get that the expression is 11

<h2>Explanation:</h2>

As I understand the expression is the following:

$a+4$

Let's call, that expression as $E$

So we are asked to find the value of the expression when $a=7$ . In other words, we need to substitute $a=7$ , so:

$E(7)=(7)+4 \\ \\ E(7)=11$

So when evaluating $a=7$ then we get that the expression is 11

<h2>Learn more:</h2>

Distributive property: brainly.com/question/10794694

#LarnWithBrainly

4 0

3 years ago

12=24-y help me pleaseee

vitfil [10]

Answer:

y=12

Step-by-step explanation:

12=24-y

step 1

subtract each side by 24

24-24 cancels out

12-24=-12

now we have

-y=-12

we now have to divide by -1

-1/-1=1

-12/-1=12

so we can conclude that y=12

6 0

3 years ago

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Can someone please anwser

telo118 [61]

Since all three equations are equal, you take 15 x 20, which =300, once again because all of the equations are equal, take 300 and divide it by 5, that will give you your first question mark.{you should have gotten 60.} To find the second one, you are going to apply the same concept, Take 300 and divide it by 6, giving you your second question mark. {you should have gotten 50}...
P.S.: {hope I helped} :)

7 0

3 years ago

If the sum of -4 and the opposite of a number is multiplied by -3, the result is 6 less than the product of the number and 2. Wh

OLEGan [10]

One number is eight less than five times another. If the sum of the two numbers is 28, find the numbers . Please levae this i need points i have 0000

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3 years ago

The base of a rectangular tank measures 10 ft by 20 ft. The tank is 16 ft tall, and its top is 10 ft below ground level. The tan

sashaice [31]

Answer:

Step-by-step explanation:

Given a rectangular tank with dimension (10ft by 20ft by 16ft)

Then the volume of the tank is

Volume =length × breadth ×height

Volume=10×20×16=3200ft³

V=3200ft³

Then,

∆F= weight density × volume

∆F= 62.4×3200

∆F= 199,680 lb

Then,

Let the 0-point on the x-axis be at the bottom of the tank, so the level of the water ranges from x = 0 to x = 16ft. (It would just as well to let 0 be ground level and let x range from x = −26ft to x − 0.) Then a slice of water at level x is raised (26− x)ft

Then ∆x=(26-x)ft

Work is given as

W= -∫F∆xdx. From 0 to 16

W= -∫199,680(26-x)dx From 0 to 16

W=-199,680∫26-x dx From 0 to 16

W=-199,680 (26x-x²/2). From 0 to 16

W=-199,680(26×16-0.5×16² -0-0)

W=-199,680(288)

W=-57,507,840J

The work done to empty the tank is 57,507,840J

8 0

4 years ago

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