3 years ago

What is the sum of the polynomials? (6x + 7 + x2) + (2x2 - 3)

Mathematics

2 answers:

astraxan [27]3 years ago

8 0

Answer:

3x^2+6x+4 is the answer :D

zepelin [54]3 years ago

4 0

Answer:

3 x^2 + 6x+4

Step-by-step explanation:

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Can someone help me with this question

Nonamiya [84]

Answer:

A 50

B 10

C 12/5

D 5

E 21

F 100

4 0

3 years ago

Which binomial is a factor of the quadratic trinomial x2 − 7x + 12? A. (x − 6) B. (x + 2) C. (x − 4) D. (x + 3)

svet-max [94.6K]

Step-by-step explanation:

x2 - 7x + 12

Finding factors of 12

x2 - 4x - 3x + 12

x(x - 4) - 3(x - 4)

(x-4) (x-3) are the factors

Option C is the correct answer

3 0

3 years ago

What is the product please

Triss [41]

Answer:

180

Step-by-step explanation:

Using the order of operations, we start with the equation in parentheses. This equals 15. Now we multiply 12*15 to get the answer. Doing the math, we get 180.

Good luck!

5 0

1 year ago

Read 2 more answers

Joshua finds the perimeter of the following composite figure composed of a square and right triangle so that a braid may be cut

Bumek [7]

The perimeter of a shape is the sum of its side lengths.

<em>Joshua miscalculated the third length of the triangle</em>

First, we calculate the third length (x) of the triangle.

Because the triangle is right-angled, we can make use of Pythagoras.

So we have:

$x^2 = 7^2 + 7^2$

$x^2 = 2(7^2)$

Take square roots of both sides

$x = \sqrt{2(7^2)$

$x = 7\sqrt{2$

The other shape in the figure is a square.

So, the perimeter (P) is

$P = 7 + x + x + x + 7$ ---- i.e. the sum of the visible lengths

So, we have:

$P = 7 + 7\sqrt2 + 7\sqrt2 + 7\sqrt2+ 7$

Evaluate like terms:

$P = 14 + 21\sqrt2$

Hence, Joshua's error is that:

<em>He miscalculated the third length of the triangle</em>