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3 years ago

15. In a random sample of 40 students, 25 students preferred chocolate to

Mathematics

1 answer:

SpyIntel [72]3 years ago

4 0

25/40 = x/120
solve for x you get 75

You might be interested in

ABCD∼EFGH

DerKrebs [107]

45/75 = 30/x

30*75 = 2250/45 = 50

EF = 50 in.

6 0

3 years ago

Read 2 more answers

A company has two manufacturing plants with daily production levels of 7 x plus 19 items and 2 x minus 7 items, respectively. T

leva [86]

First plant produces 5x+26 items more than second plant daily

Step-by-step explanation:

Given

The expression for plant A will be:

$7x+19$

For plant B:

$2x-7$

In order to find that how much more items are produced by first plant we have to subtract the daily production of second plant from first plant

So,

= $7x+19-(2x-7)\\= 7x+19-2x+7\\= 7x-2x+19+7\\=5x+26$

So,

First plant produces 5x+26 items more than second plant daily

Keywords: Polynomials, expressions

Learn more about polynomials at:

#LearnwithBrainly

5 0

3 years ago

What’s the difference between (3,4) and (3,-4)

fgiga [73]

Answer:

Step-by-step explanation:

3,4 are both positive numbers

3,-4 are positive and negative numbers

4 0

3 years ago

Please help ASAP. The question is down below. thank you

ira [324]

Answer:

(1,1) minimum point

Step-by-step explanation:

The point on curve of parabola where curve changes direction is referred as the vertex of parabola.

In the given direction we can see that as the curve starts increasing from negative sides of x, first the value of y is decreasing,

then at a point which is v-shaped point(ti-point), there the value of y becomes minimum,

but after that the value of y starts increasing as value of x is increasing .

Thus, at tip -point , we can say that the parabola has changed direction.

and hence tip-point is the vertex.

while carefully looking at we can see that

value of x is 1 and y also is 1

thus vertex is (1,1).

By minimum/maximum point it means, value of x for which the value of y is minimum or maximum.

Here , the value of y at x = 1 is 1 which is minimum, it is clear from this graph that beyond this point,

at every point of curve value of y is greater than one,

Thus, option d is correct choice (1,1) minimum point

Also, remember if parabola is u shaped as shown

vertex is minimum point.

if parabola is inverted u shaped, vertex is maximum point.

3 0

3 years ago

Given that CB is tangent to A at C, then the value of X is

Marat540 [252]

Well just use the formula a^2+b^2=c^2. C squared in this case will be 30, It does not matter whether 24 is a or b^2 since we are still adding them. Now your equation should look like this

a^2+24=30 then….

a^2=30-24

a^2=6

a=square root of 6

Therefore your radius is square root of 6 or x=square root of 6

3 0

2 years ago