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4 years ago

I don’t know how to do number 2)b

Mathematics

1 answer:

miskamm [114]4 years ago

5 0

The volume is the product of length, width, and height. This is a formula you should commit to memory.
.. V = l*w*h

The base is square, so the length and height are both 25 mm. The length is given in cm, so you need to convert units so all the units match*. You know 1 cm = 10 mm, so the length is 120 mm. Or, if you convert the units of the base, you get the base is 2.5 cm square.

The numbers come out smaller and perhaps more understandable if they are given in cm, so let's do that.
.. V = (12 cm)*(2.5 cm)*(2.5 cm)
.. V = 75 cm^3

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Write each equation in function notation, then solve the function for the given value.

sergiy2304 [10]

Answer:

y = 21

Step-by-step explanation:

x = 5

y = 5 (5) - 4

y = 25 - 4

y = 21

(5 , 21)

Hope this helps!

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3 years ago

Help help help I'm dead

frosja888 [35]

87.3 for 3 58.2 for 2 hope it helps

8 0

4 years ago

Read 2 more answers

Select the margin of error that corresponds to the sample mean that corresponds to each population: A population mean of 0.45, a

Alika [10]

Answer:

C) 0.45

Step-by-step explanation:

Given that a population mean is 0.45, standard deviation is 0.001 and margin of error stands at 0.5% we have the following

0.45 + 0.001 = 0.451

Population mean with standard deviation is 0.451.

0.451 * 0.5% = 0.448745

We now reduce the number to two decimals and get the final marigin of error

0.45 as result

5 0

4 years ago

Solve for variable: 2(r-3)/4 -8 =50

kompoz [17]

Hello!

Let's begin by multiplying all 3 terms by 4, to remove the fraction:

2(r-3) - 8(4) = 50(4)

Then 2r - 6 - 32 = 200. Consolidating the constants on the right side, we get:

2r = 162. Solving for r, we divide both sides by 2, obtaining r = 81 (answer)

8 0

4 years ago

Read 2 more answers

F(x)=x^3+ax^2+bx+3 where a and b are constants. bx Given that when f (x) is divided by (x+2) the remainder is 7, (a) show that 2

Vlad1618 [11]

Part I - First synthetic division

You need to use synthetic division to come up with an expression for a and b:

(x + 2) is a factor, and the remainder is 7, so we can draw a synthetic division table...

coefficients = 1 for X^3; A for X^2; B for X^1; and 3

-2 | 1 A B 3

 -2 -2(A-2) 4(A-2)-2B

 1 (A-2) -2(A-2)+B 4(A-2)-2B + 3

Remainder = 7

So...

4(A-2)-2B + 3 = 7

4 * (A - 2) - 2B + 3 = 7

4A - 8 - 2B = 4

4A - 2B = 12

2A - B = 6
Proved

-------------------------------------------------------------------------------------------------------------------
Part II - Second Synthetic Division

We draw another synthetic division table, this time with (x - 1), so the number on the left hand side will be +1

1 | 1 A B 3

 1 (A+1) A+B+1

 1 (A+1) A+B+1 A+B+4

 Remainder = 4

So...

A + B + 4 = 4

A + B = 0

A = -B

-------------------------------------------------------------------------------------------------------------------
Part III - Solving for A and B with our two simultaneous equations

We know that A = -B and we also know that 2A - B = 6

Since we know that A is equal to -B We can substitute in A for -B, to get:

2A - B = 6

Therefore...

2A + A = 6

3A = 6

A = 2

Again, as we know that A = -B, and as we have found that A = 2, we can see:

A = -B

Therefore...

2 = -B

B = -2

So our final answer is A = 2, B = -2

Hopefully this answer is more useful than the last one, and isn't so confusing!

8 0

3 years ago