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3 years ago

Please help me! Thanks in advance

Mathematics

1 answer:

Studentka2010 [4]3 years ago

5 0

1st one as they go up in constant values

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Cellus

Paladinen [302]

Answer:

9/4

Step-by-step explanation:

The quadratic function can be rearranged to look like this:

x^2-3x-1=0

Now we see that the constant b is equal to -3. Using the hint, we find:

(-3/2)^2=9/4

Hope that helps!

4 0

2 years ago

A cubic box is completely filled with 2,179 g of water. What is the length of one side of the box, in meters? m Explain your rea

Mazyrski [523]

Answer:

$l\approx 1.296\,cm$

Step-by-step explanation:

The water density is approximately 1 gram per cubic centimeter, which means that 1 gram of water occupies a volume of a cubic centimeter. Hence, 2.179 grams occupies a volume of 2.179 cubic centimeters.

Let assume volume occupied by the water has a cube-like shape, whose side has the following measure:

$l = \sqrt[3]{2.179\,m^{3}}$

$l\approx 1.296\,cm$

5 0

2 years ago

At the school the ratio of boys to girls is 5:3 if there are 385 boys in the school, how many students are there altogether?

ser-zykov [4K]

Answer:

There are 616 total students

Step-by-step explanation:

boys : girls: total

5 3 5+3 = 8

There are 385 boys

385/5 = 77

Multiply each term by 77

boys : girls: total

5*77 3*77 8*77

385 539 616

There are 616 total students

6 0

2 years ago

Read 2 more answers

A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π meters.

Whitepunk [10]

Answer:

$A=81\pi\ m^{2}$

Step-by-step explanation:

Step 1

Find the radius of the circular cross section

we know that

The circumference is equal to

$C=2\pi r$

we have

$C=18\pi\ m$

substitute and solve for r

$18\pi=2\pi r$

simplify

$18=2 r$

$r=9\ m$

Step 2

Find the area of the circular cross section

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=9\ m$

substitute

$A=\pi (9)^{2}$

$A=81\pi\ m^{2}$

8 0

3 years ago

What is the value of p so that the expression 6x+3−(8x−5) is equivalent to (px+8) ?

Harman [31]

6x+3-(8x-5)
=
-2x(x-4)
=
2x+8
=
p = 2

8 0

3 years ago