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4 years ago

Multiply. Express your answer in standard form. -3i (6 + 2i)

Mathematics

2 answers:

Zigmanuir [339]4 years ago

7 0

Answer:

Step-by-step explanation:

distribute it -3i*6

-3i*2i

then you get

6-18i but it has to be in standard form so

-18i+6

ValentinkaMS [17]4 years ago

4 0

The answer is: 6 - 18i

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Find the value of c that makes each trinomial a perfect square<br> x^2-19x+c<br> Please Help! :)

tensa zangetsu [6.8K]

The value of c is $\frac{361}{4}$

Explanation:

Given that the trinomial is $x^2-19x+c$

We need to determine the value of c such that the trinomial is a perfect square.

The value of c can be determined using the formula,

$c=(\frac{b}{2})^2$

From the trinomial, the value of b is given by

$b=-19$

Substituting the value of b in the above formula, we have,

$c=(\frac{-19}{2} )^2$

Squaring both the numerator and denominator, we have,

$c=\frac{361}{4}$

Thus, the value of c is $\frac{361}{4}$ which makes the trinomial a perfect square.

4 0

3 years ago

Solve the system of equations. x + 3y = −1 2x + 2y = 6

mihalych1998 [28]

1x+ 3y = -12x + 2y = 6
+12x +12x
13x + 3y = 2y = 6
+3y +3y
13x = 5y = 6
13x = 5y and 5y = 6

5 0

4 years ago

To get the 10% discount, a shopper must spend at least $200.

Liula [17]

Answer:

$d\geq \$200$

Step-by-step explanation:

we know that

To get the 10% discount, a shopper must spend at least $200

Let

d ------> represent the spending (in dollars) of a shopper who gets the discount

therefore

The value of d must be greater than or equal to $200

$d\geq \$200$

5 0

3 years ago

The sum of two numbers is 30 and their

Artyom0805 [142]

Answer:

False

Step-by-step explanation:

first step is

x+y = 30

x-y = 12

3 0

3 years ago

What is the answer of this question I need to know now

Rashid [163]

The answer is B, 240 is divisible by 3,4,5 and 8.

3 0

3 years ago