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3 years ago

Solve: 2x - 3 = 2x - 5. A) -2 B) 0 C) 5 3 D) no solution

Mathematics

2 answers:

rjkz [21]3 years ago

5 0

D.) No solution

2x - 3 = 2x -5

That is because it they were to be equal to each other it would be either

2x - 3 = 2x - 3 or

2x - 5 = 2x -5

- 3 cannot be equal to -5

2x is in both the equation so they cannot be equal to each other

dezoksy [38]3 years ago

4 0

2x -2x - 3 = 2x - 2x - 5 <em>subtract 2x from both sides</em>

-3 = -5 FALSE

<h3>Answer: D) no solution</h3>

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Find the following percents. Round to the nearest thousandth when necessary. 6% of 300.

finlep [7]

300/x=100/6

(300/x)*x=(100/6)*x

300=16.6666666667*x

300/16.6666666667=x

x=18

Therefore the answer is "18."

Hope this helps!

3 0

3 years ago

Suppose that the distribution of IQ's of North Catalina State University's students can be approximated by a normal model with m

konstantin123 [22]

Answer:

The required probability is 0.6517

Step-by-step explanation:

Consider the provided information.

North Catalina State University's students can be approximated by a normal model with mean 130 and standard deviation 8 points.

μ₁ = 130 and σ₁ = 8

Chapel Mountain University's students can be approximated by a normal model with mean 120 and standard deviation 10 points.

μ₂ = 120 and σ₂ = 10

As both schools have IQ scores which is normally distributed, distribution of this difference will also be normal with a mean of μ₁-μ₂ and standard deviation will be $\sqrt{\sigma_1^2+\sigma_2^2}$

Therefore,

μ = 130-120=10

$\sigma = \sqrt{8^2+10^2}=12.806$

Now determine the probability of North Catalina State University student's IQ is at least 5 points higher than the Chapel Mountain University student's IQ:

$z=\frac{\bar x-\mu}{\sigma}$

$z=\frac{5-10}{12.806}\approx-0.39$

Now by using the z table we find the z- score of -0.39 is 0.6517.

Hence, the required probability is 0.6517

6 0

3 years ago

Find two consecutive positive integers wjose product is 42. (First integer= x, second integer=x+1

earnstyle [38]

It would be 6 and 7

Hope that helped!

5 0

3 years ago

large cheese pizzas cost $5 each and large one topping pizzas cost $6 each. write an equation that represents the total cost, T

Gelneren [198K]

Answer:

T = 5c +5d, where unit of the equation is $.

Step-by-step explanation:

Cost of 1 large cheese pizza = $5

No. of large cheese pizza = c

therefore

cost of c large cheese pizza = c*Cost of 1 large cheese pizza = $5c

Cost of 1 large one topping pizza = $6

No. of large one topping pizza = d

therefore

cost of d large one topping pizza = d*Cost of 1 large one topping pizza = cost of d large one topping pizza = $6d

Total cost of c large cheese pizza and cost of d large one topping pizza

= $5c +$6d

total cost is represented by T

thus, T = $5c +$5d Answer

4 0

3 years ago

A triangle ABC is inscribed in the circle, (ABC = 65° and AB=AC. Find (BDC.

podryga [215]

Answer:

∠BDC=50°

Step-by-step explanation:

∠BDC=∠A[angles at the same segment)

∠A= 180-(65+65)=180-130= 50°

so, ∠BDC=50°

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3 0

3 years ago