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Montano1993 [528]
3 years ago
10

Abigail is 8 years older than Cynthia. Twenty years ago Abigail was three times as old as Cynthia

Mathematics
1 answer:
Anestetic [448]3 years ago
5 0
Abigail would be 32 and Cynthia would be 24 now. Twenty years ago, Abigail was 12, and Cynthia was 4. 12 is 3 times as much as 4, and also 4+8=12.
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Solve for the indicated variable: ⅖(z + 1) = y for z.
sweet [91]

Answer:

  z = 5/2y -1

Step-by-step explanation:

We observe that z has ...

  • 1 added
  • the sum multiplied by 2/5

To solve for z, we undo these operations in reverse order.

  \dfrac{2}{5}(z+1)=y\qquad\text{given}\\\\z+1=\dfrac{5}{2}y\qquad\text{multiply by 5/2}\\\\\boxed{z=\dfrac{5}{2}y-1}\qquad\text{subtract 1}

5 0
3 years ago
Read 2 more answers
HELPPPPPAPPAPASPPSPWPWW
tiny-mole [99]

Answer:

x=14

Step-by-step explanation:

8x-9+6x-7 = 180 (being adjacent angles)

14x-16 = 180

14x = 180+16

14x =196

x = 196/14

x =14

please mark me brainliest.

8 0
2 years ago
Read 2 more answers
Select the correct answer from each drop-down menu.
RSB [31]

Evidence are simply facts to support a claim, while counterexamples are instances to show the contradictions in a claim

<em>The question is incomplete, as the required drop-down menus are missing. So, I will give a general explanation</em>

<em />

To show that a statement is true, you need evidence.

Take for instance:

\mathbf{if\ a^2 = 4,\ then\ a = 2}

The evidence that the above proof is true is by taking the <em>squares of both sides of </em>\mathbf{a = 2}

\mathbf{a^2 = 2^2}

\mathbf{a^2 = 4}

However, a counterexample does not need a proof per se.

What a counterexample needs is just an instance or example, to show that:

\mathbf{if\ a^2 = 4,\ then\ a \ne 2}

An instance to prove that: \mathbf{if\ a^2 = 4,\ then\ a = 2} is false is:

\mathbf{a = -2}

Hence, the complete statement could be:

<em>In a direct proof, evidence is used to support a proof . On the other hand, a counterexample is a single example that shows that a proof is false.</em>

<em />

Read more about evidence and counterexample at:

brainly.com/question/88496

5 0
2 years ago
3 (a) Simplify e+ es
ANEK [815]

Answer:

I don't understand your question but here's some sample of simplify

Step-by-step explanation:

Simplify –(46x2y3z)0

The parenthetical portion still simplifies to 1, but this time the "minus" is out in front of the parentheses; that is, it's out from under the power, so the exponent doesn't touch it. So the answer in this case is:

–(46x2y3z)0 = –1

7 0
2 years ago
What is a percentage increase of 19.50 to 22.50
Inga [223]
To find the <span>percentaje</span> we need to <span>divided</span> the <span>tataol</span> by the amount we end up having.

22.50/19.50=1.15 
<span>then</span> we multiply by 100
115% 
Then to find the <span>percentaje</span> increase we subtract
115%-100= 15%
So it has an <span>increament</span> of 15%
4 0
3 years ago
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