All categories

3 years ago

Subtract (7x-2) - (3x-5)

Mathematics

2 answers:

jenyasd209 [6]3 years ago

5 0

Answer:

4x - 3

Step-by-step explanation:

(7x - 2) - (3x - 5)

Open the bracket and observe the signs,

7x -2 - 3x + 5 ( when the minus outside the bracket multiplies minus in the bracket, it becomes plus)

Collect like terms

7x - 3x - 2 + 5

4x - 3

Solnce55 [7]3 years ago

3 0

Answer:

4x + 3 is the answer obtained when we subtract (7x-2) - (3x-5)

Step-by-step explanation:

Given that, (7x-2)-(3x-5)

Minuend = 7x-2

Subtrahend = 3x-5

In subtraction of algebraic terms, we place the variables together and the constants together and then perform the operation

Thus,

= (7x-2)-(3x+5) opening brackets and rewrite the equation.

= 7x-2-3x+5 bring 'x' terms together

= (7x-3x)-(2-5)

= 4x-(-3)

= 4x+3

Thus, after subtracting (7x-2)-(3x-5) we get 4x+3

You might be interested in

A steel company is making flat rectangular frames as a part of a new product they are launching Each frame will be cut out of a

Basile [38]

Answer:

The problem has no real solution, because the area of inside of the frame is bigger than the total area of the frame.

Step-by-step explanation:

Any way here is the mathematical explanation/solve to this statement.

As show in the graphic, there is a representation of the situation stated in the problem. So in order to calculate the area we have the next equation as a function of x.

Area:

$A=b*h= (6+2x)(11+2x)\\\\A=28=66+12x+22x+4x^2}\\\\Simplifing\\\\4x^2+34x+38=0\\\\$

Solving the equation to find the roots (values of x):

$x=\frac{-b+- \sqrt{b^2-4ac} }{2a}=\frac{-34+-\sqrt{546} }{8} \\\\solving\\\\x=-7.2\\\\x=-1.3\\$

So mathematically there is no real answer, since x is a width must be positive number. And practically the outer area must be bigger than the inner area, and the inner area is given by 6 times 11, or 66 $cm^2$ .

8 0

3 years ago

Uma escola tem 25 professores Dos quais 24% Ensinam matemática. quantos professores ensino matemática nessa escola ?

konstantin123 [22]

(25 : 100) *24 =

0.25 * 24 =

6 (is your answer)

5 0

3 years ago

* The American Diabetes Association estimates that 8.3% of people in the

Leto [7]

Answer:

The probability that the diagnosis is correct is 0.95249.

Step-by-step explanation:

We are given that the American Diabetes Association estimates that 8.3% of people in the United States have diabetes.

Suppose that a medical lab has developed a simple diagnostic test for diabetes that is 98% accurate for people who have the disease and 95% accurate for people who do not have it.

Let the probability that people in the United States have diabetes = P(D) = 0.083.

So, the probability that people in the United States do not have diabetes = P(D') = 1 - P(D) = 1 - 0.083 = 0.917

Also, let A = event that the diagnostic test is accurate

So, the probability that a simple diagnostic test for diabetes is accurate for people who have the disease = P(A/D) = 0.98

And the probability that a simple diagnostic test for diabetes is accurate for people who do not have the disease = P(A/D') = 0.95

Now, the probability that the diagnosis is correct is given by;

Probability = P(D) $\times$ P(A/D) + P(D') $\times$ P(A/D')

= (0.083 $\times$ 0.98) + (0.917 $\times$ 0.95)

= 0.08134 + 0.87115

= 0.95249

Hence, the probability that the diagnosis is correct is 0.95249.

8 0

3 years ago

A box of photographs contains 13 wedding photographs 4 vacation photographs and 8 holiday photographs one is randomly selected w

ryzh [129]

Probability=desired outcomes/total possible outcomes

so
desired outcomes is the 'not wedding' photos
there are 4 vacation and 8 holiday
so 12 'not wedding' photos
12=desired outcomes

total outcomes is 13+4+8=25

so the probablity would be 12/25 or about 48%

7 0

3 years ago

PLEASE HELP, IM DYING. I NEED HELP ON THIS QUESTION! thank you.

Vaselesa [24]

Answer:

Step-by-step explanation:

its volume is h.r^2.ℼ

r = radius

h = height

5 x (5x5) x ℼ = 125ℼ

125ℼ is approximately 392.7

6 0

3 years ago