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3 years ago

Free ponitsYAS HAPPIRNESS

Mathematics

2 answers:

Leya [2.2K]3 years ago

6 0

Yay thank you!!!!!!!!’nn

Mememem

frez [133]3 years ago

5 0

Answer:

thanks

Step-by-step explanation:

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Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added

Artyom0805 [142]

First we have to combine like terms. 4x² is one term. -8x is another term. -7 is another term. poly = "many" ⇒ polynomial = many terms

(4x² - 8x - 7) + (-5x + 16)

4x² - 8x - 7 - 5x + 16

Combine like terms.
Step 1: 4x² has no other terms with x² so it stays by itself.
Step 2: -8x and -5x are like terms because they both have x.
So -8x -5x = -13x (You put two negatives together)
Step 3: -7 and 16 don't have any x with them. -7 + 16 = 16 - 7 = 9

Now we put all the answers of the steps together.
Step 1: 4x²
Step 2: -13x
Step 3: 9

So the answer is 4x² - 13x +9
And it's a polynomial because there are three terms = "more than one term"

4 0

4 years ago

Find the error american car produce 5,650,000 cars each year.In a report,ben wrote that americans made 6,550,000 cars.What mista

Oksanka [162]

Answer:

The error Ben made was writing down 6,550,000 cars rather than 5,650,000 cars in the report.

He can fix it by correcting the wrong numbers.

Step-by-step explanation:

American car produce 5,650,000 cars each year.

When writing a report Ben wrote down that americans produce 6,550,000 cars every year

Therefore the error Ben made in the report was that he mixed the numbers, he ought to have written 5 and 6 as the initial two numbers but rather he wrote the first number as 6 and the second number as 5.

Ben can fix his mistake by correcting the numbers and writing down the correct initial two numbers which are 6 and 5.

Hence, doing this will give him the correct number of cars which is 5,650,000 cars.

8 0

4 years ago

Amanda wants to carpet the floor of her bedroom, shown in the figure. She needs to calculate the area of the floor to determine

Scilla [17]

Answer:

A.) 32.5 Square Feet

Step-by-step explanation:

10ft + 6.5 = 16.5

16.5 + 13 = 19.5

19.5 + 13 = 32.5

10ft + 6.5 + 3 + 13 = 32.5

4 0

3 years ago

ABCD is a trapezium in which AB ∥ CD, AD ⊥ DC, AB = 4 cm, BP = 7 cm and DC = 25 cm, then area of the trapezium is 45.

Elza [17]

Question:

ABCD is a trapezium in which AB ∥ CD, AD ⊥ DC, AB = 4 cm, BP = 7 cm and DC = 25 cm, then area of the trapezium is ____.

Answer:

101.5cm²

Step-by-step explanation:

The figure for the trapezium ABCD is attached to this response.

To find the area of the trapezium, we use the formula for calculating the area of a trapezium given as follows;

A = $\frac{1}{2}$ x (a + b) x h ------------------(i)

Where;

A = area of the trapezium

a and b are the parallel sides of the trapezium

h = height of the trapezium.

As shown in the figure,

AB and CD are parallel

Therefore, we can say that;

a = AB

b = CD

Also, from the figure,

The height of the trapezium is BP

Therefore, we can say that;

h = BP

We know that;

a = AB = 4cm

b = CD = 25cm

h = BP = 7cm

Substitute these values of a, b and h into equation (i) as follows;

A = $\frac{1}{2}$ x (4 + 25) x 7

A = $\frac{1}{2}$ x (29) x 7

A = 101.5

Therefore, the area of the trapezium is 101.5cm²

8 0

3 years ago

Convert to 0,125km to centimetres..........

34kurt

Answer:

12500 cm

Step-by-step explanation:

0,125 km = 125 m (times 1000 because 1 km = 1000 m)

125 m = 12500 cm (times 100 because 1 m = 100 cm)

5 0

3 years ago