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Oksanka [162]
3 years ago
14

4x-7y=2 -8+7y=-18 please help me hah im confused

Mathematics
1 answer:
ddd [48]3 years ago
6 0
-8 + 7y = - 18
7y =10
y =10/7

Substitute y = 10/7 into first equation
4x - 7 (10/7)=2
4x - 10 =2
4x = 12
x = 3

Thus, the solution is x = 3 and y = 10/7
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Please help, photo is attached. Thanks!
Karolina [17]
I believe the answer is B! good luck.
4 0
3 years ago
g A law firm has six senior and seven junior partners. A committee of three partners is selected at random to represent the firm
expeople1 [14]

Answer:

133/143

Step-by-step explanation:

Let S be the sample space

Let E be the event of selecting three committee partners with at least one junior partner.

Partners in the law firm include:

Senior partners = 6

Junior partners = 7

Total partners = 13

n(S) = number of ways of selecting 3 partners from 13 = 13C3

n(S) = 13C3 = 13!/(10!3!) = (13x12x11)/(3x2x1) = 286

To get n(E) i.e least 1 junior partner in the selected committee, we may have:

(2 senior and 1 junior) or ( 1 senior and 2 junior) or (3 junior).

Therefore, the required number of way is given below:

= (6C2 x 7C1) + (6C1 x 7C2) + 7C3

= [(6x5)/2 x 7] + [6 x (7x6)/2] + [(7x6x5)/(3x2)]

= 105 + 126 + 35

n(E) = 266

Therefore, the probability P(E) that at least one of the junior partners is on the​ committee is given below:

P(E) = n(E) /n(S)

P(E) = 266/286

P(E) = 133/143

5 0
3 years ago
What is the answer here B or D and why please only answer if you’r sure
kakasveta [241]

Answer:

D - ambiguous

Step-by-step explanation:

A common protagonists within the genre of psychological suspense could be a character that is very smart. A character like this allows the viewer to consider the possibility that their own rational fears going to be the challenge - as the character who is watching you go through frightening events is also rational. Because of this, such protagonists, proves to be very effective device within the genre of psychological suspense. Therefore, an ambiguous person is going to be more intelligent.

4 0
3 years ago
HELP format is y=mx+b!!!!
Gekata [30.6K]

Answer:

y = - 3x - 3

Step-by-step explanation:

the equation of a linear function in slope- intercept form is

y = mx + b ( m is the slope and b the y- intercept )

To calculate m use the slope formula

m = (y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (- 2, 3) and (x₂, y₂ ) = (6, -21) ← 2 points from the table

m = \frac{-21-3}{6+2} = \frac{-24}{8} = - 3

y = - 3x + b ← is the partial equation

To find b substitute any other point from the table into the partial equation

using (2, - 9), then

- 9 = - 6 + b ⇒ b = - 9 + 6 = - 3

y = - 3x - 3 ← linear relationship


6 0
4 years ago
Read 2 more answers
A storage unit is in the shape of a cube with 8-foot edge lengths.
Margaret [11]
The answer is 3,072.
Heres how I got it:

SA of a CUBE: s^3 * 6

Lets plug in our numbers-
8 * 8 * 8= 512 * 6

512 * 6= 3072
7 0
3 years ago
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