3y - 5 if y = 8 answer the expression, please

Mathematics

2 answers:

Elena-2011 [213]3 years ago

7 0

3(8)-5

3x8=24

24-5=19

the answer is 19

jolli1 [7]3 years ago

5 0

Answer:

y=19

Step-by-step explanation:

if y=8 and the expression is 3y-5 then you substitute the 8 in for the y. 3(8)-5

3x8=24 so 24-5 is 19

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ou are at the county fair and play a game that involves throwing a baseball at target. You get 3 baseballs, and you win a prize

yaroslaw [1]

Answer:

0.98

Step-by-step explanation:

Prob (Ball target & prize ) = 0.74

Prob (Ball no target & no prize) = 1 - 0.74 = 0.26

Three Balls : Prob (atleast 1 prize) = 1 - Prob (No ball target & no price)

= 1 - (0.26)^3

= 1 - 0.017576

= 0.982424

3 0

3 years ago

The plane is tiled by congruent squares of side length $a$ and congruent pentagons of side lengths $a$ and $\frac{a\sqrt{2}}{2}$

umka2103 [35]

The percentage of this plane that's enclosed by the pentagons is closest to: D. 56.

<h3>How to determine the percentage?</h3>

Since the side of the small square is a, then the area of the tile is

given by:

Area of tiles = 9a²

<u>Note:</u> With an area of 9a², 4a² is covered by squares while 5a² by pentagons.

This ultimately implies that, 5/9 of the tiles are covered by pentagons and this can be expressed as a percentage as follows:

Percent = 5/9 × 100

Percent = 0.555 × 100

Percent = 55.5 ≈ 56%.

Read more on area of square here: brainly.com/question/8902873

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Complete Question:

The plane is tiled by congruent squares of side length a and congruent pentagons of side lengths a and a²/a, as arranged in the diagram below. The percent of the plane that is enclosed by the pentagons is closest to (A) 50 (B) 52 (C) 54 (D) 56 (E) 58