Translate question into an equation, let x be unknown number 6.4 is 90% of what number?

Answers

Answer 1

Answer: $1 \% = (1)/(100)\n \n90 \% * x =6.4 \n \n(90)/(100)x=6.4 \n \n(9 )/(10 )x=6.4 \ \ *((10)/(9))\n \nx= 6.4 *(10)/(9)\n \nx=(64)/(9)\n \nx = 7(1)/(9)$

Answer 2

Answer: 6.4 = 90% x X
X =?
Happy to Help!

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What's the lateral area of a right circular cone if the diameter of the base is 4 m and the slant height of the cone is 15m? Round your answer to the nearest whole number. A. 214m2 B. 107m2 C. 94m2 D. 188m2

Please help with a, b, and c!!

Answers

(a).
The product of two binomials is sometimes called FOIL.
It stands for ...

   the product of the First terms (3j x 3j)
plus
   the product of the Outside terms (3j x 5)
plus
   the product of the Inside terms (-5 x 3j)
plus
   the product of the Last terms (-5 x 5)

FOIL works for multiplying ANY two binomials (quantities with 2 terms).

Here's another tool that you can use for this particular problem (a).
It'll also be helpful when you get to part-c .

Notice that the terms are the same in both quantities ... 3j and 5 .
The only difference is they're added in the first one, and subtracted
in the other one.

Whenever you have

      (the sum of two things) x (the difference of the same things)

the product is going to be

   (the first thing)² minus (the second thing)² .

So in (a), that'll be (3j)² - (5)² = 9j² - 25 .

You could find the product with FOIL, or with this easier tool.
______________________________

(b).
This is the square of a binomial ... multiplying it by itself. So it's
another product of 2 binomials, that both happen to be the same:

(4h + 5) x (4h + 5) .

You can do the product with FOIL, or use another little tool:

The square of a binomial (4h + 5)² is ...

   the square of the first term    (4h)²
plus
   the square of the last term       (5)²
plus
   double the product of the terms 2 · (4h · 5)
________________________________

(c).
Use the tool I gave you in part-a . . . twice .

The product of the first 2 binomials is    (g² - 4) .

The product of the last 2 binomials is also (g² - 4) .

Now you can multiply these with FOIL,
or use the squaring tool I gave you in part-b .

a. (3j - 5)(3j + 5)
3j(3j + 5) - 5(3j + 5)
3j(3j) + 3j(5) - 5(3j) - 5(5)
9j² + 15j - 15j - 25
9j² - 25

b. (4h + 5)²
(4h + 5)(4h + 5)
4h(4h + 5) + 5(4h + 5)
4h(4h) + 4h(5) + 5(4h) + 5(5)
16h² + 20h + 20h + 25
16h² + 40h + 25

c. (g - 2)²(g + 2)²
(g - 2)(g - 2)(g + 2)(g + 2)
(g(g - 2) - 2(g - 2))(g(g + 2) + 2(g + 2))
(g(g) - g(2) - 2(g) + 2(2))(g(g) + g(2) + 2(g) + 2(2))
(g² - 2g - 2g + 4)(g² + 2g + 2g + 4)
(g² - 4g + 4)(g² + 4g + 4)
g²(g² + 4g + 4) - 4g(g² + 4g + 4) + 4(g² + 4g + 4)
g²(g²) + g²(4g) + g²(4) - 4g(g²) - 4g(4g) - 4g(4) + 4(g²) + 4(4g) + 4(4)
g⁴ + 4g³ + 4g² - 4g³ - 16g² - 16g + 4g² + 16g + 16
g⁴ + 4g³ - 4g³ + 4g² - 16g² + 4g² - 16g + 16g + 16
g⁴ - 12g² + 4g² + 16
g⁴ - 8g² + 16

Exercises
1. The sum of both numbers of a number is 14. On having exchanged the numbers of the tens with that of the units, the number increases in 18. It finds the original number.

2. The sum of two numbers is 21 and his difference is 5. ¿Which are the numbers?

Please I am grateful for them to him very much indeed ...:)

Answers

a)
Note that there are only two numbers that correspond complete wording of question: 59 and 68
It is easy to verify that the number found number is 68:

Look:
6 + 8 = 14 and
86 - 68 = 18

b)
Now you can solve one system:

x + y = 21
x - y = 5

Add both equations:

2x = 26
x = 13

So: y = 8

If f(x)= 2x, find f(-3)
please help, I'm so confused ;-;

Answers

Answer:

-6

Step-by-step explanation:

2 x -3 = -6

hope this helped

Muriel says she has written a system of two linear equationsat has an infinite number of solutions One of the equationsof the system is 3y 2x 9. Which could be the otherequation?

Answers

The equation of the line is
3y = 2x - 9

For the system to have infinite number of solutions, the equations of the lines must be equivalent i.e., the equations will result to the same equation if the coefficient of one variable in an equation is made equal to the coefficient of the same variable to the other equation. So,

The possible answers are
y = 2/3 x - 3
3/2 y = x - 9/2

Or any multiples or rearrangements of either equations.

Answer:

y=2/3x-3

Step-by-step explanation:

I need to prove in words how I got my answer for, "Find the smallest number easily divisible by each counting number from 1 to 10." The answer is 2520, but I don't know how to explain how I got it. Can anyone give me a basic answer to this?

Answers

Try writing each equation from 1-10 that equal this number. That will prove it. Hope this helps!

Please HELP me with these and explain. i did these but i wanna make sure they are right.

Answers

6.739 = 6.7 to the tenth place
52.192 = 52.2 to the tenth place
0.61 = 1 to the unit(ones) place
348.508 = 348.51 to the hundredth place

17)6.700
18)52.200
19)1.00
20)348.510

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By doubling each dimension the area of a parallelogram increased from 36 square centimeters to 144 square centimeters. find the percent of increase in area