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3 years ago

Three more than the product of two and a number x

2 answers:

6 0

Writing an equation based on a sentence depends on the mathematical phrases in the sentence. 3 + 2x. 3 more is 3 + and than the product of two and a number x is 2x. So 3 + 2x.

Nonamiya [84]3 years ago

3 0

$2x+3$

You are taking two times a number, which is defined as x. That is equivalent to 2x. Then, you are adding three more to that product.

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Find a 2 × 2 matrix b ≠ o and b ≠ i2 such that ab = ba, where a = 1 7 0 1 . b =

riadik2000 [5.3K]

If $\mathbf A$ is invertible, then we can simply choose $\mathbf B=\mathbf A^{-1}$ because for any invertible matrix $\mathbf X$ by definition we must have $\mathbf{XX}^{-1}=\mathbf X^{-1}\mathbf X=\mathbf I$ .

We have $\det\mathbf A\neq0$ , as

$\det\mathbf A=\begin{vmatrix}1&7\\0&1\end{vmatrix}=1\times1-0\times7=1$

which means $\mathbf A$ is non-singular and has an inverse. The inverse itself would be

$\mathbf A^{-1}=\dfrac1{\det\mathbf A}\begin{bmatrix}1&0\\-7&1\end{bmatrix}^\top=\begin{bmatrix}1&-7\\0&1\end{bmatrix}$

6 0

3 years ago

Domain and range of (4,-4),(2,-3),(-5,1),(4,-1)

aniked [119]

(x; y)

The domain is x.

The range is y.

Therefore

(4; -4) → x = 4; y = -4

(2;-3) → x = 2; y = -3

(-5; 1) → x = -5; y = 1

if is (-4; -1) not (4; -1) then

(-4; -1) → x = -4; y = -1

The DOMAIN = {-5; -4; 2; 4}

The RANGE = {-4; -3; -1; 1}

If is (4; -4) and (4; -1) then it is not a function.

4 0

2 years ago

Can someone help me with this?

baherus [9]

Answer:

Step-by-step explanation:

AB = AW + WB

But AW also equals WB because of the bisecting point

x + 6 = 3x

6 = 2x

x = 3

AW = 3 + 6 = 9

WB = 3(3) = 9

9 + 9 = 18°

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

8 0

2 years ago

Can someone help me?

AfilCa [17]

Answer: 14450

Step-by-step explanation:

15% of 17000 is 2550. 17000-2550 is 14450

4 0

2 years ago

Find the value of x. 7 Х 3 Z X =√[?] Pls help explain !!

Alisiya [41]

Answer:

Answer:

x = √70

Step-by-step explanation:

The triangles shown are all similar, so the corresponding sides are proportional.

hypotenuse/long side = x/7 = (7+3)/x

Cross-multiplying gives ...

x^2 = 7(10)

x = √70

_____

You will note that the value of x (the long side) is the geometric mean of the long segment and the whole hypotenuse.

A similar "geometric mean" relation holds for the short side:

BC = √(CD·CA)

There is yet another "geometric mean" relation that holds for the altitude:

BD = √(CD·AD)

Step-by-step explanation:

HOPE THIS HELPS

8 0

2 years ago