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3 years ago

Which ratio is NOT proportionate to 15/45 ?

Mathematics

2 answers:

Delvig [45]3 years ago

4 0

15/45 simplify is 1/3.
3/9 _ is 1/3
3/15 _ is 1/5
1/3 is 1/3
30/60 is 1/2
So 3/15 and 30/60 are the correct answers

serious [3.7K]3 years ago

3 0

Hey there, Lets solve this step by step.

Question = Which ratio is NOT proportionate to 15/45 ?

A proportion is an equation written in the form stating that two ratios are equivalent.

15/45 ⊄ 3/15

Cross multiply:
15 * 15 = 45 * 3

Simplifying
15 * 15 = 45 * 3

Multiply 15 * 15
225 = 45 * 3

Multiply 45 * 3
225 = 135

Solving 225 = 135

The left and right sides are not equal, therefore there is no solution.

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Find the surface area of the square pyramid shown below. (Measurements in picture)

Sloan [31]

Given:

Side length of base = 8

Slant height = 6

To find:

The surface area of the square pyramid.

Solution:

Surface area:

$$SA=A+\frac{1}{2} p s$

where A is the area of base

p is the perimeter of base

s is the slant height

Area of base (A) = 8 × 8

= 64

Perimeter of base(P) = 4 × 8

= 32

Substitute these in the formula:

$$SA=64+\frac{1}{2} \times 32 \times 6$

$$SA=64+96$

$$SA=160$

The surface area of the square pyramid is 160 unit².

8 0

2 years ago

Read 2 more answers

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stealth61 [152]

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5 0

3 years ago

Please help me with the below question.

tresset_1 [31]

We have the following three conclusions about the piecewise function evaluated at x = 14.75:

$\lim_{t \to 14.75^{-}} f(t) = 66$ .
$\lim_{t \to 14.75^{+}} f(t) = 10$ .
$\lim_{t \to 14.75} f(t)$ does not exist as $\lim_{t \to 14.75^{-}} f(t) \ne \lim_{t \to 14.75^{+}} f(t)$ .

<h3>How to determinate the limit in a piecewise function</h3>

In a piecewise function, the limit for a given value exists when the two lateral limits are the same and, thus, continuity is guaranteed. Otherwise, the limit does not exist.

According to the definition of lateral limit and by observing carefully the figure, we have the following conclusions:

$\lim_{t \to 14.75^{-}} f(t) = 66$ .
$\lim_{t \to 14.75^{+}} f(t) = 10$ .
$\lim_{t \to 14.75} f(t)$ does not exist as $\lim_{t \to 14.75^{-}} f(t) \ne \lim_{t \to 14.75^{+}} f(t)$ .

To learn more on piecewise function: brainly.com/question/12561612

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2 years ago

Someone help if your good at maths

Y_Kistochka [10]

Answer:

a) w ⇒ × 5 ⇒ -3 ⇒ z

b) x ⇒ +2 ⇒ ×7 ⇒ y

y= x+2×7= x + 14

4 0

3 years ago

Find the length of arc AD. Use 3.14for r. Round to the nearest tenth.7.9 cmB66.4DС[? ]cmEntar

ch4aika [34]

The first thing we must do is calculate the circumeference:

$\begin{gathered} c=2\cdot\pi\cdot r \\ c=2\cdot3.14\cdot7.9 \\ c=49.612 \end{gathered}$

now, calculate the angle of arc

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360° - 66.4° - 180° = x

x = 113.6°

now, to calculate the arc length it would be:

$undefined$

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1 year ago