9x-2y=19 7x=21 can you please help me answer this question

Answers

Answer 1

Answer: We have such system of eq
$\left \{ {{9x-2y=19} \atop {7x=21}} \right.$
First lets solve second eq
7x=21 /:7 divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19 /-27 subtract 27 both sides
-2y=-8 /:(-2) divide both sides by -2
y=4 - its the answer

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Find the value of p(-1)=4x^4+5x^3-x^2+6

Answers

Answer:

p(- 1) = 4

Step-by-step explanation:

To evaluate p(- 1) substitute x = - 1 into p(x), that is

p(- 1) = 4 $(-1)^(4)$ + 5(- 1)³ - (- 1)² + 6

= 4(1) + 5(- 1) - 1 + 6

= 4 - 5 - 1 + 6

= 4

What is multiplication properties. Example a number line that goes from 0-27. Using numbers 6,7,8 and 9.

Answers

They are the commutative, associative, multiplicative identity and distributive properties.

Commutative property: For example 6 * 7 = 7 * 6;

Associative Property: For example (7 * 8) * 9 = 7 * (8 * 9);

Multiplicative Identity Property: For example 6 * 1 = 6 or, 1 * 6 = 6;

Distributive property: For example 6 * ( 7 + 8) = 6 * 7 + 6 * 8 or, ( 7 + 8) * 6 = 7 * 6 + 8 * 6.

Find the solution set of the inequality: -3x + 8 < 15−3x+8<15minus, 3, x, plus, 8, is less than, 15 x

Answers

Answer:

The solution to the inequality is;

x > -7/3

Step-by-step explanation:

We want to find the solution to the inequality;

-3x + 8 < 15

We can have this as;

-3x < 15-8

-3x < 7

x > -7/3

Answer:

x>-7/3

Step-by-step explanation:

In parallelogram LMNO, LM = 4.12, MN = 4, LN = 5, and OM = 6.4. Diagonals and intersect at point R. What is the length of OR?A.2
B.2.06
C.2.5
D.3.2
E.12.8