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2 years ago

What is the size of angle QRS

Mathematics

1 answer:

Black_prince [1.1K]2 years ago

4 0

Answer:

As reported by Cortez and Schlegel, the Dower‐related reconstruction typically yields a spatial QRS‐T angle from 66° to 81°, whereas those derived from Kors' regression‐related reconstructions have typically ranged from 44° to 65°, with values obtained from the true Frank leads being 35°–51°.

Step-by-step explanation:

Hope It Helps Ya ItzAlex

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Please help! A-level maths.

astra-53 [7]

$x+y=k\implies y=k-x$

Substitute this into the parabolic equation,

$k-x=6-(x-3)^2\implies x^2-7x+(k+3)=0$

We're told the line $x+y=k$ intersects $C$ twice, which means the quadratic above has two distinct real solutions. Its discriminant must then be positive, so we know

$(-7)^2-4(k+3)=49-4(k+3)>0\implies k$

We can tell from the quadratic equation that $C$ has its vertex at the point (3, 6). Also, note that

$-1\le\sin t\le1\implies3\le3+2\sin t\le5\implies3\le x\le5$

and

$-1\le\cos2t\le1\implies2\le4+2\cos2t\le6\implies2\le y\le6$

so the furthest to the right that $C$ extends is the point (5, 2). The line $x+y=k$ passes through this point for $2+5=k\implies k=7$ . For any value of $k$ , the line $x+y=k$ passes through $C$ either only once, or not at all.

So $7\le k$ ; in set notation,

$\{k\mid 7\le k$

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3 years ago

Pleasee answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!

Vera_Pavlovna [14]

Answer:3.6

Step-by-step explanation:

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3 years ago

Read 2 more answers

Find the volume of the parallelepiped with adjacent edges t = 3j – 4j – 6k, u = 3i – 7j – 7k and v = 5i + j + 3k.

Assoli18 [71]

Answer:

94 cubic units

Step-by-step explanation:

The volume of this parallelepiped (the product of area of its base and height) is equal to the absolute value of the scalar triple product $|\vec{t}\cdot (\vec{u}\times \vec{v})|$

Since

$\vec{t}=3\vec{i}-4\vec{j}-6\vec{k}=(3,-4,-6)\\ \\\vec{u}=3\vec{i}-7\vec{j}-7\vec{k}=(3,-7,-7)\\ \\\vec{v}=5\vec{i}+\vec{j}+3\vec{k}=(5,1,3)$

we have

$|\vec{t}\cdot (\vec{u}\times \vec{v})|=\left|\left|\begin{array}{ccc}3&-4&-6\\3&-7&-7\\5&1&3\end{array}\right|\right|=|3\cdot (-7)\cdot 3+(-4)\cdot (-7)\cdot 5+3\cdot 1\cdot (-6)-5\cdot (-7)\cdot (-6)-3\cdot (-7)\cdot 1-3\cdot (-4)\cdot 3|=|-63+140-18-210+21+36|=|-94|=94\ un^3.$

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3 years ago

SOMEONE PLEASE GIVE STEP BY STEP ILL GIVE BRAINLIEST

Natalija [7]

Answer:

18.9 or 23.625

Step-by-step explanation:

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3 years ago

(y2 + y)(3y^3 - 2y^3) = y2 (3y^3 - 2y^3) + y(3y3 - 2y^3) is an example of:

noname [10]

Answer:

D. Vertical Multiplication

Step-by-step explanation:

It would actually look like

3y^3 - 2y^3

× y^2 + y

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2 years ago