All categories

3 years ago

A = b + rb, for r Please help me..

Mathematics

1 answer:

kifflom [539]3 years ago

6 0

Answer:

r=(a/b)-1

Step-by-step explanation:

a=b(1+r)

a/b = 1+r

r=(a/b)-1

You might be interested in

Help me fill this out thanks

sasho [114]

Answer-> ~29.66479 (29.7)

7 0

3 years ago

NO LINKS What is the surface area? 5 cm 8 cm 7 cm square centimeters

sveticcg [70]

Answer:

262 feet²

Step-by-step explanation:

2(5×8 + 5×7 + 8×7)

2(40+35+56)

2(131)

262

---

hope it helps

6 0

3 years ago

Wait

taurus [48]

A. 66 square units since you do 11x6

7 0

3 years ago

The sum of the digits of a two-digit number is 13. If 27 is added to the number, the digits will be interchanged. Find the numbe

Lesechka [4]

Hello from MrBillDoesMath!

Answer:

Discussion:

Suppose the 2-digit number is "ab". That is, 10a + b.

Sum of digits = 13 => a + b = 13 (*)

Digits reversed if 27 added to number => (10a + b) + 27 = 10b + a (**)

(**) =

(10a + b) + 27 = 10b + a => subtract 10b, then a, from both sides

9a -9b = -27 => divide both sides by 9

a - b = -3

From (*), a+ b = 13 so

(a-b) + ( a+b) = -3 + 13 =>

2a = 10 =>

a = 5

As a +b = 13, 5 + b = 13 => b = 8

Hence the number "ab" is 58

Thank you,

MrB

8 0

3 years ago

Which is the standard form of the equation of the parabola that has a vertex of (–4, –3) and a directrix of x = 2?

Zielflug [23.3K]

Answer:

Equation of the parabola is $\left(y+3\right)^{2}=-24(x+4)$

Step-by-step explanation:

We have to find the equation of a parabola with vertex is (-4,-3) and a directrix x=2.

As vertex is (-4,-3) that means parabola is in third quadrant.

So the standard formula of the parabola will be y²= -4px through origin (0,0).

But when a parabola is shifted from origin to the left of y axis so the equation will be (y-shifting form y axis)² = -4(distance between vertex and directrix)(x-shifting from x axis)

$\left\{y-(-3)\right\}^{2}=(-4\times 6)\left\{x-(-4)\right\}$

$\left(y+3\right)^{2}=-24(x+4)$ .

5 0

4 years ago

Read 2 more answers