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3 years ago

Alison has $4 less than twice the amount Ben has. Which expression represents Alison’s amount if Ben has m dollars?

Mathematics

2 answers:

fredd [130]3 years ago

6 0

Answer:

2m-4

Step-by-step explanation:

because she has double his amount (2*m) but $4 less therefore 2m-4

Alinara [238K]3 years ago

3 0

Answer:

2m-4

Step-by-step explanation:

You multiply the amount Ben has, m by 2. This would equal to 2m. After this, in the question it says " ...has $4 less..." So you subtract 4 from the multiplied amount from before. This would equal to 2m-4. Hope this helps!

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3 years ago

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Which of the following could be the perimeter of a rectangle with an area of 24 square inches?

Veronika [31]

Answer: C. 20 inches

Step-by-step explanation:

perimeter= 2 x (4+6)=20 inches

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2 years ago

-/2 points

Rom4ik [11]

Answer:

Part 1) The domain of the quadratic function is the interval (-∞,∞)

Part 2) The range is the interval (-∞,1]

Step-by-step explanation:

we have

$f(x)=-x^2+14x-48$

This is a quadratic equation (vertical parabola) open downward (the leading coefficient is negative)

step 1

Find the domain

The domain of a function is the set of all possible values of x

The domain of the quadratic function is the interval

(-∞,∞)

All real numbers

step 2

Find the range

The range of a function is the complete set of all possible resulting values of y, after we have substituted the domain.

we have a vertical parabola open downward

The vertex is a maximum

Let

(h,k) the vertex of the parabola

The range is the interval

(-∞,k]

Find the vertex

$f(x)=-x^2+14x-48$

Factor -1 the leading coefficient

$f(x)=-(x^2-14x)-48$

Complete the square

$f(x)=-(x^2-14x+49)-48+49$

$f(x)=-(x^2-14x+49)+1$

Rewrite as perfect squares

$f(x)=-(x-7)^2+1$

The vertex is the point (7,1)

therefore

The range is the interval

(-∞,1]

6 0

3 years ago

Is 15 cm greater than or less than 150 mm

Alekssandra [29.7K]

Answer:

Those are the same measurment!

Step-by-step explanation:

Conversion:

Conversion is 1cm=10mm

6 0

2 years ago

How to calculate angle BCE?

Olenka [21]

Answer:

75.3 degrees ( to nearest tenth).

Step-by-step explanation:

If we take a section through the plane BCHE we get a rectangle.

BC = 2 cm and BE = √(7^2 + 3^2). ( By the pythagoras theorem).

tan < BCE = √(7^2 + 3^2) / 2.

So the m < BCE = 75.3 degrees.

5 0

3 years ago