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3 years ago

How to solve and what is the correct multiple choice answer?

Mathematics

1 answer:

julia-pushkina [17]3 years ago

5 0

Answer:

0=0

The input is an identity: it is true for all values

Step-by-step explanation:

3 ( 4 − 7 ) = − 2 1 + 1 2

Solve

Distribute

3(4z−7)=−21+12z

1 2 − 2 1 = − 2 1 + 1 2

Rearrange terms

1 2 − 2 1 = − 2 1 + 1 2

1 2 − 2 1 = 1 2 − 2 1

add 2 1 to both sides of the equation

12 − 2 1 = 1 2 − 2 1

1 2 − 2 1 + 2 1 = 1 2 − 2 1 + 2 1

simplify

Add the numbers

12z = 12z

Subtract 12 from both side of the equation

1 2 = 1 2

12z- 12z= 1 2 − 12

Simplify, combine like Terms

0=0

Hope this helps.

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Math help @LIEMONDER

klio [65]

First picture)
I: 5x+2y=-4
II: -3x+2y=12

add I+(-1*II):
5x+2y-(-3x+2y)=-4-12
8x=-16
x=-2

insert x=-2 into I:
5*(-2)+2y=-4
-10+2y=-4
2y=6
y=3

(-2,3)

question 6)
I: totalcost=115=3*childs+5*adults
II: 33=adults+childs
33-adults=childs

insert childs into I:
115=3*(33-adults)+5*adults
115=99-3*adults+5*adults
16=2*adults
8=adults

insert adults into II:
33-8=childs
25=childs

so it's the last option

question 7)
a) y<6 and y>2 can also be written as 2<y<6, so solution 3 exist for example
b) y>6 and y>2 can also be written as 2<6<y, so solution 7 exist for example
c) y<6 and y<2 inverse of b: y<2<6, so for example 1
d) y>6 and y<2: y<2<6<y, this is impossible as y can be only either bigger or smaller than 2 or 6

so it's the last option

question 8)
I: x+y=12
II: x-y=6

subtract: I-II:
x+y-(x-y)=12-6
2y=6
y=3

insert y into I:
x+3=12
x=9

(9,3)

question 9)
I: x+y=6
II: x=y+5

if you take the x=y+5 definition of II and substitute it into I:
(y+5)+y=6

which is the second option :)

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3 years ago

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melomori [17]

Answer:

Step-by-step explanation:

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3 years ago

Use the distributive property to expand the expression 11(3x+5y)

professor190 [17]

YES THIS IS A GOOD QUESTION LET ME TRY THE ANSWER AND THEN I WILL EDIT THE ANSWER

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3 years ago

Read 2 more answers

The general form of the equation of a circle is ax2 by2 cx dy e = 0, where a = b 0. if the circle has a radius of 3 units and th

aev [14]

The set of values which might correspond to the circle are A = 1, B = 1, C = 0, D = -8 and E = 7.

<h3>The equation of a circle.</h3>

Mathematically, the general form of the equation of a circle is given by;

(x - h)² + (y - k)² = r²

<u>Where:</u>

h and k represents the coordinates at the center.

r is the radius of a circle.

Based on the information provided that the center of the circle lies on the y-axis, we have:

(h, k) = (0, 4)

Radius, r = 3 units.

Substituting the given parameters into the formula, we have;

(x - 0)² + (y - 4)² = 3²

x ² + y² - 8y + 16 = 9

x ² + y² - 8y + 7 = 0.

Therefore, the set of values which might correspond to the circle are A = 1, B = 1, C = 0, D = -8 and E = 7.

Read more on circle here: brainly.com/question/1615837

#SPJ1

<u>Complete Question:</u>

The general form of the equation of a circle is Ax² + By² + Cx + Dy + E = 0, where A = B. If the circle has a radius of 3 units and the center at (0, 4), which set of values of A, B, C, D, and E correspond to the circle?

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2 years ago

a recipe for ice-cream includes 3/4 cup of milk, 1/3 cup cream, and 1/8 cup sugar. which shows the amounts from least to greates

Nina [5.8K]

1/8 = .125
3/4 = .75
1/3 = .333""

1/8, 1/3, 3/4.

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3 years ago

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