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Rama09 [41]
3 years ago
8

Please help, I’m trying to learn but I’m having so much trouble not understanding.

Mathematics
1 answer:
Alona [7]3 years ago
3 0

Answer:

-6x^2 +5xy - 6x

Step-by-step explanation:

Remember PEMDAS.

First distribute -5x into (x-y+1), as well as x into (x+1)

distributing first part: -5x^2 + 5xy - 5x ( remember, subtracting a negative is like adding.)

distributing second part: -x^2 - x (These are both negative due to the - in front of the X in the original problem.).

Then just simplify it by adding <em>like terms</em> (terms with the same variables and powers.). -5x^2 + 5xy - 5x - x^2 - x

-6x^2 +5xy - 6x

Answer: -6x^2 +5xy - 6x

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Five hundred sixth-grade students
AveGali [126]

Answer:

The ratio in three ways are 500 : 125 or 100 : 25 or 4 : 1

Solution:

Given that,

Five hundred sixth-grade students  were surveyed

Which means,

sixth-grade students = 500

125 had traveled on an airplane

What is the ratio of total sixth-grade students to the number of students who had  traveled on an airplane?

Therefore,

total sixth-grade students : students  traveled on airplane = 500 : 125

Ratio = 500 : 125

Reduce to lowest terms,

Divide both sides by 5

Ratio = 100 : 25

Further reduce to simplest terms,

Divide both sides by 25

Ratio = 4 : 1

Thus the ratio in three ways are 500 : 125 or 100 : 25 or 4 : 1

Step-by-step explanation:

3 0
2 years ago
Find the product. 7. $458.29 × 6.3% 8. $280.12 × 7.75%
miskamm [114]

Answer:

7. 28.8722

8. 21.7093

Step-by-step explanation:

458.29 x .063=28.8722

21.7093 x .0775= 21.7093

6 0
3 years ago
Find the area of a triangle formed by placing the vectors [3, 6] and [7, 1] tail-to-tail.
Usimov [2.4K]

Answer:

a. A=10u^{2}

b. View graph

c. 6.40u

Step-by-step explanation:

knowing that the triangle area is equal to base by heigh between two, then:

A=\frac{bh}{2}=\frac{5*4}{2}=10u^{2}

The length of the longest altitude of your triangle is:

c^{2}=a^{2}+b^{2}=5^{2}+4^{2}=25+16=41\\    c=\sqrt{41}=6.40u

finally it can be seen that the position of the triangle does not matter, as long as the base and heigh are maintained, the area of ​​the triangle will be the same

6 0
3 years ago
What is the answer I need help I tried 49 time and I said it was wrong help
Phantasy [73]

Answer:

1530

Step-by-step explanation:

I believe that is the answer

u just divide the 3rd column by 3 thats how I did it

hope this helped :)

6 0
3 years ago
Maya is taking her friends to a concert. Each ticket costs
nlexa [21]

Answer:

C=4

Step-by-step explanation:

So you multiply 3 tickets by 25 and you get $75. You then subtract $130 from $75 and you get $55 you then multiply 12 by 4 to get $48. And that's how 4 is the correct answer.

5 0
3 years ago
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