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3 years ago

Since i didn’t get an answer last time i’m asking again. answer parts A and B.

Mathematics

2 answers:

tester [92]3 years ago

7 0

Answer: X=0 Y=2 (equation has one solution)

Step-by-step explanation: starting with the second equation (y+2x=2) use transposition (or using the inverse operation) to move “2x” do the other side of the equation, this gives you y=-2+2

Now that you have an equation for Y plug it into the first equation (2y-6x=4) it’ll look like this: 2(-2x+2)-6x=4

Use distributive property: -4x+4-6x=4

Combine like terms: -10x+4=4

Use transposition again to move the “4” to the other side: -10x=0

Divide to get “x” by itself: x=0

NOW plug in the value of X into the equation you got for Y (y=-2x+2) it’ll look like this: y=-2(0)+2

Multiply 2 and 0: y=2

Zolol [24]3 years ago

3 0

A is x=1/3y + -2/3 for top one and x=-1/2y+1 for the bottom one

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What is 1/4y-1=1/2x+7

Setler79 [48]

Answer:

a linear equation in x and y

Step-by-step explanation:

The given equation is a linear equation (all variables to the first power) relating the variables x and y. There are an infinite number of values of x and y that will satisfy this equation.

When graphed on an x-y plane, those solution values will fall on a straight line with a slope of 2. It will cross the y-axis at y=32, and the x-axis at x=-16.

8 0

3 years ago

Please help! i'm not really good at these, thank u sm if u help!

Archy [21]

Answer:

Correct: a, b, c, d, f, g, h, i, l

Incorrect: e, j, k

Step-by-step explanation:

a. -120=60(-2) {insert x and y into the equation and see if it works} Correct

b. 60 is being multiplied by hours, so it is the mph Correct

c. 60 is always the one being multiplied, so it's the constant Correct

d. 210=60(3.5) {insert 3.5 as x [cause hours] and see if it equals 210 [it does]} Correct

e. y is the dependent variable, and it represent miles driven Incorrect

f. Direct variation equation is y=kx {in the equation, k=60} Correct

g. x is the independent variable, and it represents the hours driven Correct

h. The x and the y are proportional Correct

i. y is the dependent variable, and it represent miles driven Correct

j. y is the dependent variable, and it represent miles driven Incorrect

k. Rise=y Run=x The first point would be (1,60) {rise=60 run=1} Incorrect

l. (0,0) is a solution, and it is also the y-intercept Correct

(hope this helps :P)

8 0

3 years ago

A toy train is built with the ratio of the model to the real of 1:30. If the real train is supposed to be 55 feet long, how many

Zigmanuir [339]

Answer:

The answer to your question is 20 in

Step-by-step explanation:

Data

ratio 1 : 30

real length = 55 ft

toy train length = ?

Process

1.- Use ratio and proportions to solve this problem.

1 : 30 :: x : 55

solve

x = (55 x 1) / 33

Simplification

x = 55/33

result

x = 1.67 ft

2.- Convert the length to in

1 ft ------------------ 12 in

1.67 ft -------------- x

x = (1.67 x 12) / 1

-Simplification

x = 20/1

-Result

x = 20 in

4 0

3 years ago

in 2015 pbi airport saw a decrease in travels from 63,386 in 2014 to 60,129 to the nearest percent what is the percent of decrea

viva [34]

Answer:

5.14% decrease in air travelers.

Step-by-step explanation:

The percent decrease in air travelers is a

$\frac{decrement}{original \:number } \times 100\%$

From the question, the number decreased from, 63,386 to 60,129.

The decrease is :

$\frac{60129 - 63386}{63386} \times 100\%$

We subtract the numerator to get:

$\frac{ - 3257}{63386} \times 100\%$

$= - 0.05138 \times 100\%$

This finally gives:

$- 5.14\%$

Therefore , there was 5.14 percent decrease in air travelers in Palm Beach for 2015

4 0

3 years ago

What expressions are equivalent to z + (z + 6)z+(z+6)

Mariana [72]

$z^{2} + 8z + 6$

Simplifying:

z + (z + 6)z + z + 6=

$z + z^{2} + 6z + z + 6$ =

$z^{2} + 8z + 6$

4 0

3 years ago