Select the equation in point-slope form for the line that passes through the point (1, -1) and has a slope of 4.

Help me please I can’t figure it out!

Advocard [28]

Answer:

vv

Step-by-step explanation:

10.1(3) + 9.5(4) = 30.3 + 38.0

= 68.3

4 0

3 years ago

Find sinx given cos2x=5/9

Diano4ka-milaya [45]

Answer:

sinx = √2/3

Step-by-step explanation:

cos2x = 1-2sin²x

5/9 = 1-2sin²x

2sin²x =1-5/9

2sin²x = 4/9

sin²x = (4/9)/2

sin²x = (4/9)*(1/2)

sin²x = 2/9

sinx = √2/3

8 0

3 years ago

Pls help .................................

Sophie [7]

Answer:

60

Step-by-step explanation:

yeah I looked it up but like that's what u have to do to not fail lol

4 0

3 years ago

Add 1/4 + 5/14 +6/7 Simplify the answer and write it as a mixed number.

zhannawk [14.2K]

Answer:

$\frac{41}{28}$ = $1\frac{13}{28}$

Step-by-step explanation:

In order to add fractions, the denominators must all be the same value (the lowest common denominator). The lowest common denominator is the smallest value that all of the given denominators (in this case, the denominators are 4, 14, and 7) can divide into.

Here, the smallest number that all three of the given denominators can perfectly divide into is 28:

28 ÷ 4 = 7

28 ÷ 14 = 2

28 ÷ 7 = 4

Therefore, our lowest common denominator is 28.

The next step is to change our numerators to match our lowest common denominator. To do this, we have to multiply the numerator by the same value that we would need to multiple the denominator by in order to get our lowest common denominator.

For our first term of 1/4, we need to multiply our denominator (4) by 7 in order to get our lowest common denominator of 28. So, we need to also multiply our numerator by 7:

$\frac{1}{4}$ × $\frac{7}{7}$ = $\frac{7}{28}$

Therefore, our first term becomes $\frac{7}{28}$ .

For our second term of 5/14, we need to multiply our denominator (14) by 2. So, we need to also multiply our numerator by 2:

$\frac{5}{14}$ × $\frac{2}{2}$ = $\frac{10}{28}$

Therefore, our second term becomes $\frac{10}{28}$ .

For our third term of 6/7, we need to multiply our denominator (7) by 4. So, we need to also multiply our numerator by 4:

$\frac{6}{7}$ × $\frac{4}{4}$ = $\frac{24}{28}$

Therefore, our third term becomes $\frac{24}{28}$ .

Now that they all have the same denominator, we simply have to add all three together:

$\frac{7}{28}$ + $\frac{10}{28}$ + $\frac{24}{28}$ = $\frac{41}{28}$

When we simplify this into a mixed number, we get:

$\frac{41}{28}$ = $1\frac{13}{28}$

4 0

3 years ago

Read 2 more answers

Can you please help me out

Taya2010 [7]

The bag contains,

Red (R) marbles is 9, Green (G) marbles is 7 and Blue (B) marbles is 4,

Total marbles (possible outcome) is,

$\text{Total marbles = (R) + (G) +(B) = 9 + 7 + 4 = 20 marbles}$

Let P(R) represent the probablity of picking a red marble,

P(G) represent the probability of picking a green marble and,

P(B) represent the probability of picking a blue marble.

Probability , P, is,

$\text{Prob, P =}\frac{required\text{ outcome}}{possible\text{ outcome}}$ $\begin{gathered} P(R)=\frac{9}{20} \\ P(G)=\frac{7}{20} \\ P(B)=\frac{4}{20} \end{gathered}$

Probablity of drawing a Red marble (R) and then a blue marble (B) without being replaced,

That means once a marble is drawn, the total marbles (possible outcome) reduces as well,

$\begin{gathered} \text{Prob of a red marble P(R) =}\frac{9}{20} \\ \text{Prob of }a\text{ blue marble =}\frac{4}{19} \\ \text{After a marble is selected without replacement, marbles left is 19} \\ \text{Prob of red marble + prob of blue marble = P(R) + P(B) = }\frac{9}{20}+\frac{4}{19}=\frac{251}{380} \\ \text{Hence, the probability is }\frac{251}{380} \end{gathered}$

Hence, the best option is G.

5 0

1 year ago