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3 years ago

PLEASE IF YOUR A MATH EXPERT ANSWER THIS I'M LOSING MY SANITY

Mathematics

2 answers:

Nana76 [90]3 years ago

8 0

Answer:

Step-by-step explanation:

Plug in the values for x and y into the expression and simplify:

numerator: 4(2) + 4 = 12

denominator: 2(4) - 2 = 6

dividing: 12/6=2

Lostsunrise [7]3 years ago

4 0

Answer: 2

If x is 2 and y is 4 we have

4(2) + 4 / 2(4) - 2

4 x 2 is 8

8 + 4 is 12

Now we have

12/ 2(4) - 2

2 x 4 is 8

8 - 2 is 6

So now we have

12/6 which can be simplified to 2

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If A is perpendicular to B and B is perpendicular to C, what

vladimir1956 [14]

If $A\perp B$ and $B\perp C$ then $A\parallel C$ .

Hope this helps.

5 0

3 years ago

What is the value of b^2 - 4ac for the following equation<br><br> 2x^2 + 3x = -1

kicyunya [14]

Answer:

Step-by-step explanation:

We are finding the discriminant of the function

It needs to be written in the form ax^2 +bx+c =0

2x^2 +3x = -1

Add 1 to each side

2x^2 +3x+1 = -1+1

2x^2 +3x+1 = -0

b^2 -4ac

a=2 b=3 and c = 1

3^2 - 4(2)(1)

9 - 8

7 0

3 years ago

Read 2 more answers

What is the order from least to greatest: 2/6, 3/7, 5/12, and 4/10?

fenix001 [56]

Answer: Order from Least to Greatest

2/6 < 4/10 < 5/12 < 3/7

Step-by-step explanation:

6 0

3 years ago

Sarah is doing research on the average age of first-year resident physicians. She wants her estimate to be accurate to within 1

WINSTONCH [101]

Answer: The number of first-year residents she must survey to be 95% confident= 263

Step-by-step explanation:

When population standard deviation ( $\sigma$ ) is known and margin of error(E) is given, then the minimum sample size (n) is given by :-

$n=(\dfrac{z^*\sigma}{E})^2$ , z* = Two-tailed critical value for the given confidence interval.

For 95% confidence level , z* = 1.96

As, $\sigma$ = 8.265, E = 1

So, $n= (\dfrac{1.96\times8.265}{1})^2 =(16.1994)^2\\\\= 262.42056036\approx263\ \ \ [\text{Rounded to the next integer}]$

Hence, the number of first-year residents she must survey to be 95% confident= 263

7 0

3 years ago

(1) 4p²q : 10pq²

tiny-mole [99]

Answer: (1) 2p: 5q.

(2) 3:10.

(3) 5:6.

Step-by-step explanation:

To find : Ratio

(1) 4p²q : 10pq²

$=\dfrac{4p^2q}{10pq^2}\\\\=\dfrac{2p^{2-1}}{5q^{2-1}}\\\\=\dfrac{2p}{5q}$

i.e. Simplified ratio of 4p²q : 10pq² is 2p: 5q.

(2) 9 months : 2½ years

1 year = 12 months

$2\dfrac{1}{2}\text{years}=\dfrac{5}{2}\text{years}\\\\=\dfrac{5}{2}\times12=30\text{ months}$

Now, 9 months : 2½ years = $\dfrac{9\text{ months}}{30\text{ months}}=\dfrac{3}{10}$

Hence, Simplified ratio of 9 months : 2½ years is 3:10.

(3) 5 m : 600 cm

1 m = 100 cm

So, 5m = 500 cm

Now, 5 m : 600 cm = $\dfrac{500\ cm}{600\ cm}=\dfrac{5}{6}$

Hence, Simplified ratio of 5 m : 600 cm is 5:6.

7 0

3 years ago