I'm so confused, cans omeone help it's a TEST!!

Answer:

This is a proportion

Step-by-step explanation:

Cross multiply:

12 * 20 = 16 * 15

Simplifying:

12 * 20 = 16 * 15

Multiply 12 * 20

240 = 16 * 15

Multiply 16 * 15

240 = 240

Add '-240' to each side of the equation.

240 + -240 = 240 + -240

Combine like terms: 240 + -240 = 0

0 = 240 + -240

Combine like terms: 240 + -240 = 0

0 = 0

Solving

0 = 0

Answer:

b > -9

Step-by-step explanation:

(-3b > 27) / -3

= b > -9

Answer:

x=1, y=1.

Step-by-step explanation:

From the second equation:

x = 8 - 7y, so substituting for x in the first equation:

3/8(8 - 7y) + 1/3y = 17/24

3 - 21/8 y + 1/3y = 17/24

1/3y - 21/8y = 17/24 - 3

Multiply through by 24:

8y - 21*3 y = 17 - 72

8y - 63y = -55

-55y = -55

y = 1.

And  substituting for y in the second equation:

x + 7(1) = 8

x = 8 - 7

x =  1.

Answer:

10000

Step-by-step explanation:

to know if this answer is correct you have to know the rounding rules:

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40.

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30.

Answer:

4x+6y<=10

Step-by-step explanation:

The linear inequality that describes the graph is 4x+ 6y ≤ 10.

Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.

As, The bold straight line passes through the points (1,1) and (-2, 3).

so, equation of line will be

(y- 1) = (3-1)/ (-2-1) (x-1)

y-1 = 2 / (-3) (x-1)

-3y + 3 = 2x - 2

-3y -2x = -5

If we multiply by 2 both side we get

-6y - 4x = -10

4x+ 6y= 10

So, the required inequality for gray area is 4x+ 6y ≤ 10.

Learn more about Inequality here:

https://brainly.com/question/14379175

#SPJ7

Answer:

c

Step-by-step explanation:

7.5 + 7.5 + 4.5 +4.5 = 24

Answer:

42

Step-by-step explanation:

Answer:

45

Step-by-step explanation:

4 - 2 × 8 + (6 × 2) × 4 + 3²

= 4 - (2 × 8) + (6 × 2) × 4 + 3²

= 4 - 16 + 12 × 4 + 9

= (4 - 16) + (12 × 4) + 9

= -12 + 48 + 9

= 45

Answer:

=3

Step-by-step explanation:

5b/c

=5*6/10

=30/10

=3

Answer:

If b = 6 and c = 10, the value of an expression is 3.

Step-by-step explanation:

Given the expression

[tex]\frac{5b}{c}[/tex]

We have to evaluate the expression if b = 6 and c = 10.

Important Tip:

In order to evaluate the expression  [tex]\frac{5b}{c}[/tex], all we need to do is to substitute the value of b and c in the expression.

As the expression is

[tex]\frac{5b}{c}[/tex]

substitute b = 6 and c = 10 in the expression

[tex]\frac{5b}{c}=\frac{5\left(6\right)}{10}[/tex]

     [tex]=\frac{30}{10}[/tex]

      [tex]=3[/tex]       ∵ [tex]\frac{30}{10}=3[/tex]

Therefore, if b = 6 and c = 10, the value of an expression is 3.

Answer:this was  house ago but 68

Step-by-step explanation:

Answer:

the answer is 68

Step-by-step explanation:

Answer:

Equation 1: 50 + 5x = 80, Or 5(10 + x) = 80

Equation 1 answer: 6

Equation 2: 5x + 10 = 80

Equation 2 answer: 14

Answer:

[tex]x=18[/tex]

Step-by-step explanation:

By rearranging and multiplying by 6 at the end:

[tex]\frac{1}{2}x - 7 = \frac{1}{3}(x-12)\\\frac{1}{2}-7 = \frac{1}{3}x - 4\\\frac{1}{2}x - \frac{1}{3}x = -4 + 7\\(\frac{3}{6} - \frac{2}{6})x = 3\\\frac{1}{6}x = 3\\x = 3 \cdot 6 = 18[/tex]

6.) ∆DAY

7.) SAS

Step-by-step explanation:

step 1. this is a polynomial division problem

x^2 + 11x + 52

---------------------------------

step 2. (x -3) [ x^3 + 8x^2 + 19x + 13

step 3. x^3 - 3x^2

step 4. 11x^2 + 19x + 13

step 5. 11x^2 - 33x

step 6. 52x + 13

step 7. 52x - 156

step 8. R -> 169

step 9. Ans: x^2 + 11x + 52 R 169

Step-by-step explanation:

calculate the each one then compare

hint :

mean : add all the numbers and divide by how many numbers there are .

median : the middle number . for example : 12345 . 3 is the middle number .

mode : the number that appears more often than the other numbers.

Answer:

Step-by-step explanation:

Simplify, rationalize the denominator

Answer:

Step-by-step explanation:

1/2(4x - 16) = 14

2x - 8 = 14             {add 8 to both sides}

 2x = 22               {divide both sides by 2}

   x = 11

Answer:

for what?

Step-by-step explanation:

Answer:

4u+3

Step-by-step explanation:  8/1*1/2= 8/2=4u

                                              8/1*3/4= 24/8=3    

Answer:

731

Step-by-step explanation:

Answer:

5^4

Step-by-step explanation:

When dividing exponents with the same base, you subtract their exponents.

8-4=4

This means that 5^8 / 5^4 is equal to:

5^4

Answer: 60%

Step-by-step explanation:

10 percent is 1 bolt so therefore 6 bolts would make 60%

Answer:

I think its C if I'm wrong, sorrryyy

Answer:

C) 23

Step-by-step explanation:

If the computer monitor is 20 inches wide, and 12 inches high, we can solve for the diagonal by using the Pythagorean theorem.

Let a = the width, let b= the height, let c = the diagonal.

a^2 + b^2 = c^2

20^2 +12^2 =c^2

400 + 144 = c^2

544 = c^2

C is approximately equal to 23 inches.

Let me know if this helps!

Answer:

60 seconds

Step-by-step explanation:

step 1.) find how many meters it falls per second

          40m / 4sec = 10m/s

step 2.) use the equation above to find in terms of the question

          10m/s for 6sec = 10 x 6 ====> 60 seconds

Answer:

2= 4

3= -9

4= 1 and 2/3

Answer:

a

Step-by-step explanation:

15x+45

5*3=15

5*9=45

5(3x+45)

Answer:

18.75

Step-by-step explanation:

Answer:

[tex]\sqrt{3}[/tex]

Step-by-step explanation:

See attachment 1. This is the formula to use.

There are two numbers, so n=2. Plugging them into the formula, you get

[tex]\sqrt[2]{6*\frac{1}{2}} \\[/tex]

Now, putting a 2 in front just means we're finding the square root, so I'll get rid of it. Then, just do the calculation.

[tex]\sqrt{6*\frac{1}{2}}=\sqrt{\frac{6}{2}}=\sqrt{3}[/tex]

Answer:

√3

Step-by-step explanation:

To find the Geometric mean, multiply the values given, then take the square root.

x² = ab

x= √ab

It's a "central tendency" we are calculating.

This is different from the arithmetical mean which uses addition and division to find that average.

Answer:

number 2

Step-by-step explanation:

4/10 and 10/25 are equal : proportionate