-14=-20y-7x
10y+4=2x

Solve by Elimination please!

Answer:

1.2

Step-by-step explanation:

1. First, we have to write an equation with a variable! Given 0.8%, we know that it's equal to (0.8/100), and "of" means to multiply. Therefore, the equation will looks like this: [tex]\frac{0.8}{100} * 150 = x[/tex]

2. Now, let's solve for x!

Therefore, 0.8% of 150 is 1.2!

Answer:

42 ounces of flour

Step-by-step explanation:

8 - 48

7 - x

When you cross multiply, you get:

8x = 7*48

8x = 336

x = 336/8

x = 42

Feel free to mark this as brainliest! :D

Answer:

Step-by-step explanation:

27^x = 9÷(3^x)

So (3^3)^x = (3^2)÷(3^x)

So 3^3x = 3^(2-x)

Comparing powers on both sides,

3x = 2 - x

So, 4x = 2

So, x = 1/2

Given ( 27 ) ^ x = 9 / 3 ^x

⇒ ( 3 × 3 × 3 )^x = ( 3 × 3 ) / 3^x

⇒ ( 3 ³ )^x = 3² / 3^x

⇒  3 ^ 3x × 3^x = 3²            [ since  ( a ^m)^n = a ^mn ]

⇒ 3^ (3x +x) = 3²                [ since a^m × a^n = a ^m+n ]

⇒ 3^4x = 3²

⇒4x = 2                      [ since  If a ^m = a ^n then m = n ]

⇒ x = 2 / 4

 ∴ x = 1 / 2

I hope this helps you.

Answer:

12453.3333333

Step-by-step explanation:

4/3 is the same things as 4 ÷ 3 which is 1.33333333333

1.33333333333*9340 = 12453.3333333

Hope this helps!

Answer:

[tex]r = 13[/tex]

Step-by-step explanation:

[tex](8r + 5) + (5r + 6) = 180 \\ 13r + 11 = 180 \\ 13r = 180 - 11 \\ 13r = 169 \\ \\ r = \frac{169}{13} \\ \\ r = 13[/tex]

Answer:

the answer is C.

Step-by-step explanation:

your welcome..

Answer:

youre answer would be 4 so that would be C

Step 1: Find the Slope

Slope Formula: (y2 - y1) / (x2 - x1)

Point 1 = (4, -3)

Point 2 = (2, 1)

Slope = (1 - - 3) / (2 - 4) = (4) / (-2) = -2

Step 2: Find the Y-Intercept

Plug in the slope and one of the points into slope-intercept form and solve for b.

Slope-Intercept Form: y = mx + b

1 = -2(2) + b

1 = -4 + b

b = 5

Step 3: Put it all together

Plug in the slope and y-intercept into slope-intercept form.

Slope-Intercept Form: y = mx + b

y = -2x + 5

Hope this helps!! :)

Answer:

0.5+0.75=0.80

now

1+1=2

2+0.80=2.89

Answer:

.25

Step-by-step explanation:

its very easy btw you shouldn't have needed to post it just use a calculator.

Answer:

-11 or -5

Step-by-step explanation:

If the difference here means subtraction then it's -11, if it means the opposite, then it's -5

Answer:

42

Step-by-step explanation:

times 70 by two to get how many notebooks needed total.

70*2=140

subtract how many notebooks you already had.

140-98=42

The no. of notebooks we need more will be equal to 42 notebooks.

It is given that no. of notebooks available is 98 and there are 70 children in class.

We have to find no. of notebooks needed more if each child gets two notebooks.

What is algebra ?

Algebra is the branch of mathematics that deals with various symbols and the arithmetic operations and the symbols are called variables.

As per the question ;

No. of notebooks we had in class = 98 notebooks

And

Total no. of children = 70 children

The no. of notebook each child gets = 2 per child

So ;

70 children will get no. of notebooks ;

= 70 × 2

= 140 notebooks

The no. of notebooks we need will be ;

= 140 - 98

= 42 notebooks

Thus , the no. of notebooks we need will be equal to 42 notebooks.

To learn more about algebra click here ;

https://brainly.com/question/22516053

#SPJ2

Answer:

(-5,-4.5)

Step-by-step explanation:

Answer:

a = 27

Step-by-step explanation:

3x + 6y = a

From the given information, 3 and 6 are the numbers of passengers that cars and vans can take. That means x and y must be the numbers of cars and vans, and a is the total number of passengers.

a = 27

Answer:

The value of x is 60°, and the value of y is 50°.

Step-by-step explanation:

50°+70°+x°=180°

x=180°-120°

x=60°

similarly the angle on the left side of x will be

70°

All these angles form 180°(linear pair)

hence, 70°+60°+y°=180°

130°+y°=180°

y°=180° - 130°

y°=50°

Hope this helps you. Have a nice day. Please amrk as braiiest. It helps a lot.^_^

Answer:

x=9

Step-by-step explanation:

x+1=10

*subtract 1 from both sides

x=9

Rational equations can be used to solve a variety of problems that involve rates, times and work. Using rational expressions and equations can help you answer questions about how to combine workers or machines to complete a job on schedule.

Answer:

13

Step-by-step explanation:

So the concept is that co-interior angles add up to 180 in parallel line. This means:

3x + 9 + 9x + 15 = 180

So we solve for x.

12x + 24 = 180 ( What I did was simplifying the equation).

12x + 24 - 24 = 180 - 24

12x / 12= 156 / 12

x = 13

HOPE THIS HELPED

Answer:

19,500

Step-by-step explanation:

This is probably a good one.

Answer:

m= 4(25) + 2(7)

m= 100 + 14

m= 114

Answer:

40

Step-by-step explanation:

Answer:

2.58

Step-by-step explanation:

Answer:

4 23/42 ≅ 4.547619

Step-by-step explanation:

Step-by-step explanation:

2x + y = 5 (times 3)

6x + 3y = 25

↓↓↓↓↓↓↓↓↓↓↓↓

6x + 3y = 15

6x + 3y = 25

→ No solution ←

2x+y=5

6x+3y=25

As slopes are equal lines are parallel

So no solutions

Option D

Answer:

351

Step-by-step explanation:

3%=0.03

3900*0.03*3=351

Answer:

no it will not show the awning and powerful than you HA the same time as an event on Friday and powerful than you HA

Answer: 31/25/50

Explanation: 31 is the second one. 6 less than second is 25 which is the first one, and third is 2x the first so 50

50 + 25 + 31 = 106