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3 years ago

1. Find the value of each expression. Show your work.

Mathematics

2 answers:

Mashcka [7]3 years ago

7 0

Are the decimal points supposed to be multiplication symbols?

kolezko [41]3 years ago

4 0

Answer: A) 1.44 B) 13 C) 3

Step-by-step explanation:

A) 1.2 * 1.2 =1.44

B) (8) +17 - (12)= (8+17) -12= (25)- (12)= 13

C) (9*9) / (3*3*3)= (81) / (27)= 3

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Definition of order or operations

Nataliya [291]

Order of operations: the rules of which calculation comes first in an expression.

They are: PEMDAS

Do everything inside parentheses first: ()
then do exponents: x2
then do multiplies and divides from left to right
lastly do the adds and subtracts from left to right

8 0

2 years ago

Read 2 more answers

Michele correctly solved a quadratic equation using the quadratic formula as shown below.

Fofino [41]

Answer:

The original equation must have been:

$7x^{2} -5x-2=0$

Step-by-step explanation:

A quadratic equation is in the form of :

$ax^{2} +bx+c=0$

And it is solved in the form of :

$x=\frac{-b+\sqrt{b^{-4ac} } }{2a}$ and $x=\frac{-b-\sqrt{b^{-4ac} } }{2a}$

Now the given equation is :

$x=\frac{-(-5)+-\sqrt{(-5)^{2} -4(7)(-2)} }{2(7)}$

We can see that here;

a = 7

b = -5

c = -2

So, the original equation must have been:

$7x^{2} -5x-2=0$

5 0

3 years ago

Solve the inequality r-(-5)>-2

Jet001 [13]

Answer:

$r>-7$

Step-by-step explanation:

Solving an inequality is similar to solving an equation. To solve for r, isolate it. Whatever you do to one side, do to the other. Remember that a negative and a negative equal a positive, thus one side of the inequality becomes r + 5. Then, subtract both sides by -5 to find the answer.

$r-(-5) >-2\\r+5>-2\\r>-7$

7 0

2 years ago

Whose y-intercept is (0,6) and slope is 3?

GrogVix [38]

your answer is y=3x +6

6 0

3 years ago

How many times bigger is 2.7 than 0.03

OlgaM077 [116]

90 times bigger :) hope this helps !

4 0

2 years ago