All categories

3 years ago

Solve the following system: y = x + 3

Mathematics

2 answers:

KiRa [710]3 years ago

8 0

<h2>the answer is:</h2>

c. (4,7)

rodikova [14]3 years ago

4 0

Answer:

(4,7)

Step-by-step explanation:

3x+x+3=19

4x=16

x=4

so y=7

You might be interested in

Solve the systems below:

Sergio [31]

Answer:

Check my explanation

Step-by-step explanation:

1. x=-7y

2(-7y)-8y=22

-14y-8y=22

-22y=22

y=-1;x=7, I used subtitution because that process was easier.

2. x=3+y

7(3+y)-y=-3

21+7y-y=-3

21+6y=-3

6y=-24

y=-4; x=-1, I used subtitution because that process was easier.

3. x=1 and y=1, I used elimination because that process was easier.

4. x-3=4x-9

-3x=-6

x=3; y=0, I used subsitution because that process was easier.

8 0

3 years ago

I need the answers to all 4 asap please!! they shouldn’t be too hard

TiliK225 [7]

parallelogram

1. perimeter 10(2)+10(2)=32+20

perimeter = 52cm

area=b times h

area = 16(9)=144cm2

2 TRAPEZOID

perimeter =( 21+24+25+44.67)m

=114.67m

area= 1/2( b1+b2)h

1/2(44.67+25)20

696.7m2

3. perimeter = 2+3+12+2+3+5+3+2+9+7+3

=51cm

area = 54+6+6+6=72cm2

4. perimeter is 10+4+2+3+ 2+4+10+23 = 58cm

area is 

(11+23).8=37.8

=272

trap-rect=136-6

=130ft2

3 0

3 years ago

Can someone help me with these 5 question I have attached?

Contact [7]

Example 2: x=10

Example 3: x=-1

Example 4: x=35

Example 5: a-b+c=9

Example 6: x=1, x=1/2

Further explanation:

Example 2:

$\sqrt{4x-4} =6$

Taking Square on both sides

$(\sqrt{4x-4})^2 =(6)^2\\4x-4=36\\4x=36+4\\4x=40\\\frac{4x}{4}=\frac{40}{4}\\x=10$

Example 3:

$9+\sqrt{4x+8}=11$

Subtracting 9 from both sides

$9-9+\sqrt{4x+8}=11-9\\\sqrt{4x+8}=2\\$

Taking Square on both sides

$(\sqrt{4x+8})^2=(2)^2\\4x+8=4\\4x=4-8\\4x=-4\\\frac{4x}{4}=-\frac{4}{4}\\x=-1$

Example 4:

$8+\sqrt{x+1}=2$

subtracting 8 from both sides

$8-8+\sqrt{x+1}=2-8\\\sqrt{x+1}=-6$

Taking Square on both sides

$(\sqrt{x+1})^2=(-6)^2\\x+1=36\\$

Subtracting 1 from both sides

$x+1-1=36-1\\x=35$

Example 5:

$\sqrt{a-b+c}=3$

Taking Square on both sides

$(\sqrt{a-b+c})^2=(3)^2\\a-b+c=9\\$

Example 6:

$2\sqrt{2x-1}=4x-2$

Taking square on both sides

$(2\sqrt{2x-1})^2=(4x-2)^2\\4(2x-1)=16x^2+4-16x\\8x-4=16x^2-16x+4\\8x=16x^2-16x+4+4\\8x=16x^2-16x+8\\16x^2-16x-8x+8=0\\16x^2-24x+8=0$

dividng whole equation by 8

$2x^2-3x+1=0\\2x^2-2x-x+1=\\2x(x-1)-1(x-1)=0\\(2x-1)(x-1)=0\\2x-1=0 => x=\frac{1}{2}\\x-1=0 => x=1$

Keywords: Radical Expressions, Examples

Learn more about radical expressions at:

#LearnwithBrainly

3 0

3 years ago

your marksmanship score are 6 and 10 on two test . if you want average 9 on the tests , waht must your third score be?

Mamont248 [21]

Answer:

Step-by-step explanation:

To do this you would just multiply 9 by 3 so you get 27 and subtract 6+10 which is 16 from it and then you will get 11 and that is what you will need for your third score

3 0

3 years ago

Read 2 more answers

Explain how you would order from least to greatest three numbers that include a positive number, a negative number , and a zero

Setler79 [48]

Number line of put them in order from least to greatest .

5 0

3 years ago

Read 2 more answers