Evaluate the expression if b = 5 and c = -4.
3c - 2b

Answers

Answer 1

Answer:

Answer:

3(-4) - 2(5) = -12 - 10 = -22

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Answers

Answer:

it is 68

Step-by-step explanation:

Select the correct answer.
Which of these sentences is always true for a parallelogram?

Answers

Answer:

Letter D

Remember to drink water

Answer:

parallelograms are shapes that have 2 sets of parallel sides. for example, squares, rectangles, and rhombuses are all types of parallelograms

A sixth-grade class is painting a mural. To make a darker shade of orange, they use a ratio of 5 ounces of red paint to3 ounces of yellow paint. Use this ratio to consider the amount of yellow paint needed for each amount of red paint
listed in the table.
Point
Red Paint, x (ounces)
Yellow Paint, y ounces)
A
5
ts
B
15
C
20

Answers

Answer:

Down Bellow

Step-by-step explanation:

A 5:3

B 15:9

C 20:?

*Not sure 4 20:

Is this one correct?

Answers

Answer:

do you expect me to flip sideways just to help you cheat on ur homework

Step-by-step explanation:

It’s f .................

17
Σ (15 – 9n)
η = 4

Answers

Answer:

-1113

Step-by-step explanation:

You apparently want the sum of the 14-term arithmetic sequence ...

-21, -30, -39, ..., -138

The average term is ...

(-21 -138)/2 = -79.5

so the sum of the 14 terms is ...

(14)(-79.5) = -1113

Σ (15 – 9n) = -1113

η = 4

nth term

aₙ = 15 - 9n

a₄ = 15-9*4 = 15-36= -21

a₁₇ = 15 - 9(17) = -138

Sum;

S = (a₁ + aₙ)*n/2

n = 14

a₁ = a₄= -21

aₙ = a₁₇ = -138

S = (-21 - 138)*14/2

S = -1113

A three-digit number has two properties. The tens-digit and the ones-digit add up to 5. If the number is written with the digits in the reverse order, and then subtracted from the original number, the result is 792. Use a system of equations to nd all of the three-digit numbers with these properties

Answers

Answer:

The three-digit numbers with these properties are 850 or 941.

Step-by-step explanation:

Let x be the hundreds digit, y the tens digit, and z the ones digit. The first condition says that $y+z=5$ . The second condition is:

the original number is $(100x+10y+z)$ while the reversed number is $(100z+10y+x)$ so

$(100x+10y+z)-(100z+10y+x)=792\n99x-99z=792$

Now we have the system

$y+z=5\n 99x-99z=792$

You can divide by 99 to simplify the second equation.

$y+z=5\n x-z=8$

Note that x, y, z must be digits between 0 and 9 and $x\neq 0$ . If $z>1$ , then the second equation forces $x>9$ , for example z=2 so x-2=8, x=10 which is impossible. If z=0, you get x=8, y=5 and the number is 850. If z=1, you get x=9,y=4 and the number is 941.