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Vladimir79 [104]
3 years ago
12

Any ideas please anybody?

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
3 0

Answer:

Upper bound:  7.85

Lower bound:  7.75

Step-by-step explanation:

7.8 is the value that is rounded to one decimal place.  

To find the upper and lower bounds, add and subtract one from the decimal place.  You should get 7.7 and 7.9.

Then pick the number directly in between 7.7 and 7.8  and  7.8 and 7.9.  You should get 7.75 and 7.85.

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Factor completely, then place the answer in the proper location on the grid. <br> 6х^2 - 3х - 30
Tems11 [23]

Answer:

3(x + 2)(2x - 5)

Step-by-step explanation:

Given

6x² - 3x - 30 ← factor out 3 from each term

= 3(2x² - x - 10) ← factor the quadratic

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term

product = 2 × - 10 = - 20 and sum = - 1

The factors are + 4 and - 5

Use these factors to split the x- term

2x² + 4x - 5x - 10 ( factor the first/second and third/fourth terms )

= 2x(x + 2) - 5(x + 2) ← factor out (x + 2) from each term

= (x + 2)(2x - 5), thus

2x² - x - 10 = (x + 2)(2x - 5) and

6x² - 3x - 30

= 3(x + 2)(2x - 5) ← in factored form

7 0
3 years ago
A.) 10<br> B.) 25<br> C.) 20<br> D.) 15
Sergio [31]
2x+4=10
2x=6
x=3
2(3)+4= 10
(plus, on parallelograms like that, parallel sides are equal to each other)
7 0
3 years ago
HELP PLEASE
gladu [14]

Answer:

Carmen bought 5 pounds of coffee

Step-by-step explanation:

The cost of buying coffee is $8.44 per pound. Let us assume she bought x pound of coffee, this means that she spent $8.44x on coffee.

She went to the coffee store with $80 gift card and left with $37.80, this means that after spending $8.44x from the initial $80, she had $37.80. To find the number of pounds she bought, we are to use the following equation:

80 - 8.44x = 37.80

8.44x = 80 - 37.80

8.44x = 42.2

x = 42.2/ 8.44 = 5

x = 5 pounds.

Carmen bought 5 pounds of coffee

3 0
3 years ago
Which of the following are solutions to the equation below?
anastassius [24]

Answer:

C and F

Step-by-step explanation:

Given

(3x - 5)² = 19 ( take the square root of both sides )

3x - 5 = ± \sqrt{19} ← note plus or minus

Add 5 to both sides

3x = ± \sqrt{19} + 5 ( divide both sides by 3 )

x = ±\frac{\sqrt{\sqrt{19}+5 } }{3}

Separating the solutions

x = \frac{\sqrt{19}+5 }{3} → C

x = \frac{-\sqrt{19}+5 }{3} → F

4 0
3 years ago
In the rectangle below ac=48 units what is de
r-ruslan [8.4K]

Answer:

24

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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