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3 years ago

Ples show work- kskskskskskksksksk

Mathematics

2 answers:

allsm [11]3 years ago

6 0

Answer:

Step-by-step explanation:

For this, we need to follow PEMDAS (Parenthesis, exponent, multiply/divide, add/subtract). First, we do the parenthesis, this gets us 8 - 4 + 49 - 42. Since this is all addition/subtraction, we do it from left to right. 8-4 is 4. Now our equation is 4 + 49 - 42. 4 + 49 is 53. Now our equation is 53 - 42. That is 11. That means our answer is 11.

gogolik [260]3 years ago

4 0

Answer:

Step-by-step explanation:

8-(36/9)+99-(6x7)

8-4+99-42

4+57

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For what values of b are the vectors \langle -46, b, 10 \rangle and \langle b, b^2, b \rangle orthogonal

Jet001 [13]

Answer:

b = 6 or b = -6 (non-zero vectors)

b = 0 (zero vector)

Step-by-step explanation:

Two vectors $\vec{a}=\langle a_1,a_2,a_3\rangle$ and $\vec{b}=\langle b_1,b_2,b_3\rangle$ are orthogonal if their dot product is equal to 0, or in other words

$a_1\cdot b_1+a_2\cdot b_2+a_3\cdot b_3=0$

In your case,

$\vec{a}=\langle -46, b, 10\rangle\\ \\\vec{b}=\langle b,b^2,b\rangle$

Hence, if vectors a and b are orthogonal, then

$-46\cdot b+b\cdot b^2+10\cdot b=0\\ \\-46b+b^3+10b=0\\ \\b^3-36b=0\\ \\b(b^2-36)=0\\ \\b(b-6)(b+6)=0\\ \\b=0\text{ or }b=6\text{ or }b=-6$

Note, then if b = 0, then $\vec{b}=\langle 0,0,0\rangle$ and zero-vector is orthogonal to any other vectors.

Thus, b = 6 or b = -6.

7 0

3 years ago

Helpppppppppppppppppppp

olchik [2.2K]

-4x + 10y = -4
10y = 4x - 4
y = 2/5 x - 2/5 so slope = 2/5

-2 - 2x = 5y
5y = -2x - 2
y = -2/5 x - 2/5 so slope = -2/5

the slope is opposite so the lines are intersecting

answer is A.

7 0

3 years ago

Plsssssss help due today

crimeas [40]

I assume it is the diameter of the outer wheel they are asking for.

connect OD, which is the radius of the wagon to the outer edge of the wheel.
OYD is a right triangle. use the hypotenuse theorem:
OY²+YD²=OD²
7²+24²=OD²
OD=√625
OD=25
the radius is 25, the diameter is then 50.

Note: if it is the diameter of the inner circle they are asking for, I don't know.

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3 years ago

Can you shade the venn diagram by <br>(A intersection B)intersection C

sashaice [31]

Answer:a

Step-by-step explanation:

4 0

3 years ago

6x2/5 will be greater or less than 2/5

lawyer [7]

6•2/5 =2,4

2/5 =0,4

It'll be greater

7 0

3 years ago