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2 years ago

I NEED HELP I NEED HELP I NEED HELP I NEED HELP I NEED HELP

Mathematics

2 answers:

Gwar [14]2 years ago

7 0

What do you mean? What’s the question?

Stels [109]2 years ago

5 0

Answer:

Unknown

Step-by-step explanation:

Question, not provided.

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What is equivalent to 8a-7-29a-8 A. 65a+80 B. -21a-15 C. 3a D. 37a+15

Reptile [31]

Answer:

B. -21a-15

Step-by-step Explanation:

$8a-7-29a-8 \\ \\ = 8a - 29a - 7 - 8 \\ \\ = - 21a - 15$

7 0

3 years ago

Give a vector parametric equation for the line through the point (−2,−4,0) that is parallel to the line ⟨−2−3t,1−4t,−5t⟩:

eimsori [14]

The tangent vector for the given line is

T(t) = d/dt ⟨-2 - 3t, 1 - 4t, -5t⟩ = ⟨-3, -4, -5⟩

On its own, this vector points to a single point in space, (-3, -4, -5).

Multiply this vector by some scalar t to get a whole set of vectors, essentially stretching or contracting the vector ⟨-3, -4, -5⟩. This set is a line through the origin.

Now translate this set of vectors by adding to it the vector ⟨-2, -4, 0⟩, which correspond to the given point.

Then the equation for this new line is simply

L(t) = ⟨-3, -4, -5⟩t + ⟨-2, -4, 0⟩ = ⟨-2 - 3t, -4 - 4t, -5t⟩

3 0

3 years ago

Johanna can jog 3,000 feet in 5 minutes. If she jogs at the same rate, how many feet can she jog in 8 minutes? *

olya-2409 [2.1K]

The answer is B (4,800)

Why?

Because we divide 3,500 feet by 5 and that will give us 600. Why we had to divide is because we need to find how many feet in minutes. So we do 600 times 8 and that gives us 4,800. Please mark me as branlist! Hope this helped! :)

6 0

4 years ago

Round 642,144 to the nearest thousand.

Roman55 [17]

642,000 is rounded it the nearest thousand

3 0

3 years ago

Read 2 more answers

Help with number 5 thx

Temka [501]

First, we find the area of the circle.

A = pi * r^2

A = pi * (1 cm)^2

A = pi cm^2

The area of the circle is pi cm^2.

The area of the triangle is also pi cm^2.

Now we use the area of a triangle.

A = (1/2)bh

(1/2)bh = A

(1/2)(3 cm)h = pi cm^2

(3 cm)h = 2pi cm^2

h = (2/3)pi cm

The exact height is $\dfrac{2\pi}{3} ~cm$

If you want an approximate height, then it is 2.09 cm.

3 0

4 years ago