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3 years ago

Heeeeelppp please, :) please

Mathematics

1 answer:

lara [203]3 years ago

4 0

Answer:

7/6

Step-by-step explanation:

In order to find slope when you have two ordered pairs, you use this equation: (y2-y1)/(x2-x1)

In this case, when you plug them in, you get (49-7)/(42-6), which is 42/36, which is 7/6.

Hope this helped :)

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Almost done help......

Anton [14]

Answer:

x = 1 + ( √ 10 )/ 2, or x = 1 - ( √ 10 )/ 2; Option A

Step-by-step explanation:

See steps below;

I would prefer answering this question by completing the square, rather than applying a quadratic formula;

3x^2 - 6x - 12 = 0, ⇒ Add 12 to either side,

3x^2 - 6x = 12, ⇒ Divide either side by 3,

x^2 - 2x = 4, ⇒ Write the equation in the form x^2 + 2ax + a^2 = (x + a)^2,

x^2 - 2ax + a^2 = 4 + a^2, ⇒ Solve for a

2ax = -2x,

a = - 1, ⇒ Substitute value of a,

x^2 - 2x + 1 = 4 + 1,

( x - 1 )^2 = 5, ⇒ Solve for x,

x = √5 + 1, and x = - √5 + 1,

In other words; Solution : x = 1 + ( √ 10 )/ 2, or x = 1 - ( √ 10 )/ 2; Option A

4 0

4 years ago

Round to the nearest tenth.

sammy [17]

Answer:

$c=9.3\ units$

Step-by-step explanation:

step 1

Find the measure of angle A

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

$A+B+C=180^o$

substitute the given values

$A+110^o+30^o=180^o\\A=40^o$

step 2

Find the length side c

Applying the law of sines

$\frac{a}{sin(A)}=\frac{c}{sin(C)}$

substitute the given values

$\frac{12}{sin(40^o)}=\frac{c}{sin(30^o)}$

solve for c

$c=\frac{12}{sin(40^o)}sin(30^o)$

$c=9.3\ units$

4 0

4 years ago

A bag of apples that cost $4.75 is on sale for 30%. What is the sale cost?

sukhopar [10]

Answer:

$3.32

Step-by-step explanation:

You take 30% of 4.75. You multiply 0.30 times 4.75. Then you subract that from 4.75. Boom.

3 0

4 years ago

Read 2 more answers

PLEASE HELP!!!!!!!!!!!!!!!! NUMBER 3

Hunter-Best [27]

Answer:

Step-by-step explanation:

200 ÷ 7 = 27

good luck, i hope this helps :)

6 0

3 years ago

89. A scientist is studying the growth of a population of bacteria. At the beginning of her study, she has 800 bacteria. She not

statuscvo [17]

Answer:

$\frac{log(6400)}{log(4)}$

Step-by-step explanation:

The initial population of bacteria is 800 and we know that this number is quadrupling every hour.

We're going to find a function in terms of t (time) that gives us the population of bacteria at that time.

Since the population is quadrupling every hour the function in terms of t (where t is expressed in hours) is:

$f(t)=800(4^{t})$

Now we need to find the time when there will be 5,120,000 bacterias. This means the time t when f(t) = 5,120,000

So we have 5,120,000 = $800(4^{t})$

$5,120,000 = 800(4^{t})\\\frac{5,120,000}{800} =4^{t} \\6400=4^{t} \\log(6400) =t log(4)\\\frac{log(6400)}{log(4)} =t$

Therefore, the time when there will be 5,120,000 bacterias will be:

$\frac{log(6400)}{log(4)}$

8 0

3 years ago