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3 years ago

7 divided by 2-4.5 multiplied by 3+8

Mathematics

2 answers:

Gwar [14]3 years ago

5 0

Answer: -2

Step-by-step explanation:

nordsb [41]3 years ago

4 0

Answer:

-2

Step-by-step explanation:

(7/2)-(4.5* 3) +8= -2

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PLEASE HELP ASAP

maria [59]

Answer:

First option: $3x^2-5x=-8$

Second option: $2x^2=6x-5$

Fourth option: $-x^2-10x=34$

Step-by-step explanation:

Rewrite each equation in the form $ax^2+bx+c=0$ and then use the Discriminant formula for each equation. This is:

$D=b^2-4ac$

1) For $3x^2-5x=-8$ :

$3x^2-5x+8=0$

Then:

$D=(-5)^2-4(3)(8)=-71$

Since $D$ this equation has no real solutions, but has two complex solutions.

2) For $2x^2=6x-5$ :

$2x^2-6x+5=0$

Then:

$D=(-6)^2-4(2)(5)=-4$

Since $D$ this equation has no real solutions, but has two complex solutions.

3) For $12x=9x^2+4$ :

$9x^2-12x+4=0$

Then:

$D=(-12)^2-4(9)(4)=0$

Since $D=0$ this equation has one real solution.

4) For $-x^2-10x=34$ :

$-x^2-10x-34=0$

Then:

$D=(-10)^2-4(-1)(-34)=-36$

Since $D$ , this equation has no real solutions, but has two complex solutions.

3 0

3 years ago

FAST PLEASE

meriva

Answer:

A. 5

Step-by-step explanation:

y2 - y1 / x2 - x1

5 - -5 / 3 -1 = 10/2 = 5

7 0

3 years ago

Allison is planning a bridal shower for her daughter. She has decided on a budget of $3,000 to pay

denpristay [2]

Answer:2350

Step-by-step explanation:3000-1750=2350

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3 years ago

Here is the question

Fittoniya [83]

The answer is (4,8). I hope this helps.

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3 years ago

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Suppose the bank installs nine alarms. What is the expected number of alarms that will detect a burglar?

Harrizon [31]

The answer is 6 because

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3 years ago