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3 years ago

Tell how an estimate helps you decide if your answer is reasonable.

1 answer:

8 0

Because it gives you a number that is close to the answer and if it is close to your number like for instance, the actual answer is 10 then if you get 5 as your estimate that's close.

You might be interested in

How many black keys would you expect to find on a keyboard with 72 keys in all? Show your work.

Black_prince [1.1K]

Answer:

50 black keys

Step-by-step explanation:

for every set of 7 white keys there are 5 black keys

72/7 = 10

so there is a total of 10 full sets of keys

then you have 2 white keys remaining but that doesn't matter because they will just be on the dies and already have a black key next

so this means that you only have to calculate the number of 10 sets of black keys and thats 5 x 10.

hope this helps : )

4 0

3 years ago

PLEASE ANSWER FAST

Bas_tet [7]

Answer:

Step-by-step explanation:

4 0

3 years ago

Simplify (Y^2+7y+6)/(6y^2-6)

Arisa [49]

Answer:

$\frac{y + 6}{6(y - 1)}$

Step-by-step explanation:

The given expression is

$\frac{ {y}^{2} + 7y + 6}{6 {y}^{2} - 6}$

The numerator is a quadratic trinomial and the denominator is different of two squares when 6 is factored.

We factor both the numerator and the denominator to obtain;

$\frac{ (y + 6)(y + 1) }{6(y - 1)(y + 1)}$

Cancel out the common factors to get:

$\frac{y + 6}{6(y - 1)}$

This is the simplest form since, we cannot simplify this further.

3 0

3 years ago

Read 2 more answers

Select the exclusion that fits best with this problem.

nalin [4]

Answer:

$\frac{1}{2y-2y^2}, y\neq 1$

Step-by-step explanation:

observe by factorization and cancelation

$\frac{y^2+y+1}{-2y(y^3-1)}=\frac{y^2+y+1}{-2y(y-1)(y^2+y+1)}\\=\frac{1}{-2y(y-1)}\\=\frac{1}{2y-y^2}$

7 0

3 years ago

A high rise building has a sink on the fourth floor located 2-feet above the floor. Each floor is 10-feet above the other. Calcu

kap26 [50]

The pressure at a certain height is the pressure at sea level plus the hydrostatic pressure.

P = 80 psi + ΔP
where
ΔP = ρgh
ρ is the density of water equal to 62.4 lbm/ft³
ΔP = (62.4 lbm/ft³)(1 lbf/lbm)(4*10 + 2 ft)(1 ft/12 in)² = 18.2 psi

Thus,
P = 80 + 18.2
<em>P = 98.2 psi</em>

8 0

4 years ago