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3 years ago

Can someone help please solving it algebraically? I’ll give you brainliest!

Mathematics

1 answer:

fomenos3 years ago

6 0

(y = x + 6)
(y = 9x - 2)
(**since both of the equations equal y, set the equations equal to each other**)
(9x - 2 = x + 6)
(**now solve**)
(8x - 2 = 6)
(8x = 8)
(x = 1)
(**now plug x back into one of the equations to find y**)
(y = 1 + 6)
(y = 7)
(**Now we found the intersection, which is (1,7))

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Alex787 [66]

Answer:

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Step-by-step explanation:

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2 years ago

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180° < x < 270°, what is the value of tan-1(0.577)?

Allisa [31]

Think: "Find tan-1(0.577)" means "Find the ANGLE in Quadrant III whose tangent is 0.577. Because the angle is in QIII, both the opp side and the adj side are negative. Here you have four answer choices. The correct answer MUST be within the interval 180 and 270 degrees. Only one of the given answer choices satisfies that criterion. Which one is it?

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3 years ago

our buses carrying 140 high school students arrive to Montreal. The buses carry, respectively, 31, 43, 27, and 39 students. One

Vinvika [58]

Answer:

V(X)= 39.10

V(Y)= 40

Step-by-step explanation:

Given that

Total number of student = 140

Bus A - 31

Bus B- 43

Bus C- 27

Bus D- 39

The probability that a student was on the bus is proportional to the number of student. Eg 31/140 in bus A, 43/140 on bus B, ...

E(X) = (31*31/140) + (43*43/140) + (27*27/140) + (39*39/140)

= 35.5

$Var(X) =(31-35.5)^2 \times \dfrac{31}{140}+(43-35.5)^2 \times \dfrac{43}{140}+(39-35.5)^2 \times \dfrac{39}{140}+(27-35.5)^2 \times \dfrac{27}{140}$

V(X)= 39.10

The bus driver have 1/4 probability on being on any of the buses.

E(Y) = 140/4 = 35

$Var(Y)=\dfrac{(35-31)^2+(35-43)^2+(35-27)^2+(35-39)^2}{4}$

V(Y)= 40

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3 years ago

Point AA is located at (9,−2). What is the location of the image after a translation along ⟨5,−3⟩ and reflected in the y-axis.

Veronika [31]

(9, -2) translated (x + 5, y - 3) => (14, -5)
(14, -5) reflected across the y-axis =>
(- 14, - 5)

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3 years ago

Equivalent fractions

lyudmila [28]

Answer:

number 1. 5/4 number 2. 7/4 number 3. 1/5

Step-by-step explanation It's the shaped parts. Hope this helps : )

3 0

2 years ago