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2 years ago

Y = -3 x - 5y = 7 I have the answer I don’t know how to show my work

Mathematics

2 answers:

Leno4ka [110]2 years ago

8 0

Answer:

Step-by-step explanation:

To use substitution in this problem, you find the Y which ='s -3. That we have clear. Now, the second equation becomes x - 5(-3) =7. A negative times a negative is a positive, so 15. Now, we have x + 15 = 7. Subtract 15 from 7 to get x = -8. Your coordinates, or your answer, will be (-8, -3)

Free_Kalibri [48]2 years ago

4 0

Answer:

(x, y) = (-8, -3)

Step-by-step explanation:

"Show your work" means write down the work you did.

Very likely, you put -3 where y is in the second equation. That is what "substitution" means.

x -5(-3) = 7

x +15 = 7 . . . simplify

x = -8 . . . . . subtract 15 from both sides

The solution to this system is ...

(x, y) = (-8, -3)

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Mitchell works at the local movie theater. He currently has $395 in his

kogti [31]

Answer: 395+30x

Step-by-step explanation:

Given : Mitchell has $395 now.

He saved $30 each week.

Let x be a variable that represents the number of weeks.

Since, Total amount = Current money + (Money save each week ) (Number of weeks)

Then, Total amount = (395 ) + (30)(x)

= 395+30x

Hence, the required algebraic expression= 395+30x

An algebraic expression is a mathematical expression consisting a variable (a,b,c,..) which can be manipulated .

3 0

3 years ago

3. 36 percent of 18 is 18 percent of what number?

Fiesta28 [93]

Answer:

The required number is 3.36.

Step-by-step explanation:

To find : 3.36 percent of 18 is 18 percent of what number?

Solution :

Let the required number be 'x',

According to question,

3.36 percent of 18 is 18 percent of x,

i.e. $3.36\%\times 18=18\%\times x$

$\frac{3.36}{100}\times 18=\frac{18}{100}\times x$

$x=\frac{3.36\times 100}{100\times 18}\times 18$

$x=3.36$

So, 3.36 percent of 18 is 18 percent of 3.36,

Therefore, The required number is 3.36.

7 0

3 years ago

5.) In a basketball game 96 points were scored. The winners scored twice as many as the

labwork [276]

Answer:

losers= 32 points winners=64

Step-by-step explanation:

winners:2x

losers:x

2x+x=3x

96/3=32

losers=32*1

Winners=32*2

7 0

4 years ago

In the figure, mZRPZ = 95 and TU ||RQ|| VW. Find the measure of angle YSV.

madreJ [45]

Answer:

$m\angle YSV=85^o$

Step-by-step explanation:

The complete question in the attached figure

step 1

Find the measure of angle QPZ

we kno that

$m\angle RPZ+m\angle QPZ=180^o$ ---> by supplementary angles (form a linear pair)

we have

$m\angle RPZ=95^o$ ---> given value

substitute

$95^o+m\angle QPZ=180^o$

$m\angle QPZ=180^o-95^o$

$m\angle QPZ=85^o$

step 2

Find the measure of angle YSV

we know that

When two lines are crossed by another line, <em><u>Alternate Exterior Angles</u></em> are a pair of angles on the outer side of each of those two lines but on opposite sides of the transversal. If the two lines are parallel then the alternate exterior angles are congruent.

In this problem

The transversal is the line XY

The two parallel lines are RQ and VW

therefore

$m\angle YSV=m\angle QPZ$ ---> by alternate exterior angle

we have

$m\angle QPZ=85^o$

therefore

$m\angle YSV=85^o$

5 0

4 years ago

Corresponding sides of what triangles are proportional

charle [14.2K]

Answer:

In a pair of similar triangles, the corresponding sides are proportional.

Step-by-step explanation:

Corresponding sides touch the same two angle pairs. When the sides are corresponding it means to go from one triangle to another you can multiply each side by the same number.

7 0

3 years ago