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3 years ago

44) The difference of two numbers is 76. The second number is 20% of the first number. What are the numbers?

Mathematics

1 answer:

Nina [5.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

Not A b/c the difference b/w 85 and 17 is not 76

Not D b/c the difference b/w 97 and 17 is not 76

Not B b/c 16 is not 20% of 92

By the process of elimination the answer is C

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What two numbers multiply to -126 and add up to -65

Airida [17]

Xy = -126
x + y = -65

$xy = -126$
$\frac{xy}{x} = \frac{-126}{x}$
$y = \frac{-126}{x}$

$x + y = -65$
$x + \frac{-126}{x} = -65$
$\frac{x^{2}}{x} + \frac{-126}{x} = -65$
$\frac{x^{2} - 126}{x} = -65$
$-65x = x^{2} - 126$
$0 = x^{2} + 65x - 126$
$x = \frac{-(65) \+ \sqrt{(65)^{2} - 4(1)(-126)}}{2(1)}$
$x = \frac{-65 \± \sqrt{4225 + 504}}{2}$
$x = \frac{-65 \± \sqrt{4729}}{2}$
$x = \frac{-65 \± 68.8}{2}$
$x = \frac{-65 + 68.8}{2}$ $or$ $x = \frac{-65 - 68.8}{2}$
$x = \frac{3.8}{2}$ $or$ $x = \frac{-133.8}{2}$
$x = 1.9$ $or$ $x = -66.9$

x + y = -65
  1.9 + y = -65
- 1.9   - 1.9
y = -66.9
  (x, y) = (1.9, -66.9)

or

  x + y = -65
  -66.9 + y = -65
+ 66.9 + 66.9
y = 1.9
  (x, y) = (-66.9, 1.9)

The two numbers that add up to -65 and can multiply to -126 are the numbers -66.9 and 1.9.

3 0

3 years ago

Look I have like barely any points can someone help answer this tho

MariettaO [177]

Answer:

3.5

Step-by-step explanation:

These are similar triangles.

BC:AC = BD:AD

6:5 is the ratio.

Then, simply multiply:

4.2 x 5/6 = 3.5

So, x = 3.5!

5 0

3 years ago

HELP I WILL MARK U BRAINEST what is (29/59)*(42/24)<br> btw / means divide

Ivahew [28]

Answer:

0.86.

Step-by-step explanation:

Calculator.

5 0

3 years ago

Read 2 more answers

Reduce the 24 hour clock times in 12 hour clock time add am or pm

Shkiper50 [21]

Answer:

1) 1:04 am

2) 6:22 pm

3) 6:42 pm

4) 1:30 pm

5) 12:40 pm

6) 5:35 pm

7) 3:24am

8) 11:25 am

9) 6:42 am

10) 9:20 am

6 0

3 years ago

Question 3

Sladkaya [172]

Answer:

(x+6)(x+2) is the factored equation

(-6, -2) is the coordinates

Step-by-step explanation:

find what multiplies to be 12 and adds to be 8

set each factor equal to 0 and solve for x, which is the coordinates

5 0

3 years ago