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DiKsa [7]
3 years ago
5

Ok so uh this is extra credit and I need some help please-

Mathematics
2 answers:
horsena [70]3 years ago
6 0

Answer:

21) E

22) -3, -4

23) -3, 4

24) A

I hope this helps!

dolphi86 [110]3 years ago
4 0
21. E
22.(-3,-4)
23.(-3,4)
24. A
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Help me please I need it
tensa zangetsu [6.8K]

Answer:

width = 8 feet and length = 12 feet

Step-by-step explanation:

Let the width be w then the length = 3w - 12 ( 12 less than 3 times the width )

The area (A) of a rectangle is

A = length × width, that is

w(3w - 12) = 96 ← area of floor

3w² - 12w = 96 ( subtract 96 from both sides )

3w² - 12w - 96 = 0 ← in standard form for a quadratic equation

Divide all terms by 3

w² - 4w - 32 = 0

Consider the product of the factors of the constant term ( - 32) which sum to give the coefficient of the w- term (- 4)

The factors are - 8 and + 4, since

- 8 × 4 = - 32 and - 8 + 4 = - 4, hence

(w - 8)(w + 4) = 0

Equate each factor to zero and solve for w

w - 8 = 0 ⇒ w = 8

w + 4 = 0 ⇒ w = - 4

However, w > 0 ⇒ w = 8

Hence width = 8 feet

length = 3w - 12 = (3 × 8) - 12 = 24 - 12 = 12 feet

6 0
3 years ago
5 Ethan scored x points in a game. His younger sister scored 8 points when she
Nuetrik [128]

The remaining values will be<u> 19, 20, 21, 22 and 23</u>

<h3 /><h3>System of equations</h3>

Given the following parameters

Ethan's score = x points

His younger sister's score = 8 points

If their total score is y points, hence the  equation relating x and y is expressed as:

x + 8 = y

x = 8 - y

If x = 10

y = x + 8

y = 18

The ramining values will be<u> 19, 20, 21, 22 and 23</u>

Learn more on tables and values here: brainly.com/question/9265203

7 0
2 years ago
In a maths class,the girl to boy ratio is 7:5 if there are 20 boys,how many girls are there?​
Goshia [24]

Answer:

28:20

Step-by-step explanation:

you just multiply 5 by 4 because 20 divided by 4 is 5 and then multiply 7 by 4

6 0
3 years ago
Read 2 more answers
What are the x-intercepts of x^2– 3x = 4?
Sindrei [870]

Answer:

x^2-3x=4

x^2-3x-4=0

x^2-4x+x-4=0

x(x-4)+1(x-4)=0

(x+1)(x-4)=0

x=-1,4

x- intercepts in the point (-1,0) and (4,0)

Step-by-step explanation:

3 0
4 years ago
Please help will give brainliest
Ostrovityanka [42]

Answer:

1、\frac{-26}{1}=-26

2、-4

3、\frac{11}{2}

4、-\frac{8}{11}

5、At direct x equals 17, there's no slope

6、0

7、\frac{15}{14}

8、-\frac{12}{30} =-\frac{2}{5}

Step-by-step explanation:

In point-slope form, it takes about 3 seconds per problem

7 0
2 years ago
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