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2 years ago

In the following proportion, what does x equal?

Mathematics

2 answers:

ValentinkaMS [17]2 years ago

8 0

A. The answer and it right

trasher [3.6K]2 years ago

6 0

A is the correct answer. 23/40=0.575 and 4.6/8= 0.575 as well.

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Solve by completing the square. Round your answers to the nearest tenth and then locate the greater solution. <img src="https://

Andrews [41]

Step-by-step explanation:

Step 1: Write our Givens

${x}^{2} + 10x - 7 = 0$

Move the constant term ,(the term with no variable) to the right side.

Here we have a negative 7, so we add 7 to both sides

${x}^{2} + 10x = 7$

Next, we take the linear coeffeicent and divide it by 2 then square it.

$( \frac{10}{2} ) {}^{2} = 25$

Then we add that to both sides

${x}^{2} + 10x + 25 = 7 + 25$

${ {x}^{2} } + 10x + 25 = 32$

Next, we factor the left,

$(x + 5)(x + 5) = 32$

we got 5 because 5 add to 10 and multiply to 25 as well.

so we get

$(x + 5) {}^{2} = 32$

This is called a perfect square trinomial.

Next, we take the square root of both sides

$x + 5 = ± \sqrt{32}$

± menas that we have a positive and negative solution.

Subtract 5 form both side so we get

$x = - 5± \sqrt{32}$

The greater solution is when sqr root of 32 is positive so the answer to that is

$\sqrt{32} - 5 = 0.7$

3 0

2 years ago

How does the volume of a cylinder change when its diameter is tripled

cupoosta [38]

V(cylinder)= πr²h
d=2r,
d is diameter, r is radius.
When diameter is tripled, a new diameter D=3d,
new radius R=3d/2=(3*2r)/2=3r
R=3r

V(new cylinder)= πR²h = π(3r)²h=9πr²h

V(new cylinder)/V(cylinder)=9πr²h/πr²h=9

Volume new cylinder 9 times more the volume of old cylinder.

5 0

3 years ago

Read 2 more answers

A student survey was conducted in a major university, where data were collected from a random sample of 750 undergraduate studen

Mekhanik [1.2K]

Answer:

Pie Chart

Step-by-step explanation:

The variable mentioned in this case is categorical. That is, it has no numerical value, and can only be put into categories.

Some of the basic rule In statistics to represent data using charts are as follows:

• For categorical variables (nominal/ordinal) variables, use pie charts and bar charts

• For interval/ratio variables, use histograms

A pie chart is a circular chart divided into wedge-like portions and is basically used to display percentage or proportion of categories in the data The percentage represented by each category is shown by the corresponding slice/portion of the whole pie.

4 0

3 years ago

Differnece between 2x+4 and 3x+4 and 4x+4

prohojiy [21]

Answer:

the difference is the slope

Step-by-step explanation:

y = mx+b

m is the slope

b is the y-intercept

2x+4

3x+4

4x+4

the m constant changes meaning the slope is the difference

6 0

2 years ago

Peter won £75 as a prize.He gave 4/5 of the prize money as a present to Roger and Bethan.Roger and Bethan shared the present in

Molodets [167]

Roger: $24
Bethan: $36

Explanation:
4/5 of $75 is $60

So $60 is distributed to Roger and Bethan in the ratio 2 : 3.

Add the numbers in the ratio 2 : 3
2 + 3 = 5

Divide $60 by 5
60 ÷ 5 = 12

Multiply each number in the ratio 2 : 3 by 12:
2 • 12 : 3 • 12
= 24 : 36

I’m sorry if I explained this badly
But if my answer was correct, brainliest please!
Have a nice day!
-SpaceMarsh :D

7 0

2 years ago