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barxatty [35]
3 years ago
13

Find the answer pleaseeee...-15/9 + 9/4 = ? Please find what the question mark is​

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0

Answer:

7/12

Step-by-step explanation:

-15/9+9/4

We need to make them have the same denominator:

9x4= 36 so that is our new denominator

-15x4= -60

9x9=81

(Sorry if i dont make sense)

Now we have -60/36+81/36 which is equal to 21/36.

Now we simplify:

21/36=7/12

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Maura is 5 years younger than her sister Cara. Seven years ago, Maura was half as old as her sister. How old is Maura now?
masha68 [24]
Let's call Maura's age now M and Cara's age now C.

We know Maura is five years younger than Cara. In symbols that is, M - 5 = C

We also know that 7 years ago Maura's age was half of Cara's. Maura's age 7 years ago was M-7 and Cara's age seven years ago was C-7. Since Maura's age (7 years ago) was half of Cara's we can write in symbols: M-7= \frac{1}{2}(C-7)

Let's take that last equation and substitute C - 5 for M (this is because according to our first equation these are equal). When we do this we get an equation with only C as the variable and solve for C as follows:

M-7= \frac{1}{2}(C-7)
C-5-7= \frac{1}{2}(C-7)
C-12= \frac{1}{2}C-( \frac{1}{2})(7)
C-12= .5C-3.5
.5C-12= -3.5
.5C= 8.5
C= 17

Cara is 17. Since Maura is 5 years younger she is 12.

As a check, seven years ago Cara was 10 and Maura was 5. It is the case that Maura was half Cara's age seven years ago.
4 0
3 years ago
What is the answer to this question?
Vlada [557]

2A on 2A + 3B + 3C = 8 pieces

The probability:

\dfrac{2}{8}=\dfrac{2:2}{8:2}=\dfrac{1}{4}

\dfrac{1}{4}=\dfrac{1}{4}\cdot100\%=25\%

<h3>Answer: 25%</h3>
4 0
3 years ago
Which distance is about 3 x 10-5 meters?
tino4ka555 [31]

Answer:

I think that c is the correct answer

8 0
3 years ago
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Zepler [3.9K]

End behavior always involves x approaching positive and negative infinity. So we'll cross off the choice that says "x approaches 1".

The graphs shows both endpoints going down forever. So both endpoints are going to negative infinity regardless if x goes to either infinity.

<h3>Answer: Choice B</h3><h3>As x approaches −∞, f(x) approaches −∞, and as x approaches ∞, f(x) approaches −∞.</h3>

Another way to phrase this would be to say "f(x) approaches negative infinity when x goes to either positive or negative infinity"

7 0
3 years ago
1. Factor the expression using the two different techniques listed for Parts 1(a) and 1(b).
Bond [772]

Answer:

1. Factor the expression using the two different techniques listed for Parts 1(a) and 1(b).

(a) Factor the given expression using the GCF monomial.

(b) Factor the given expression using the difference of squares.

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