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Airida [17]
3 years ago
13

Math please help ( ASAP vv easy )

Mathematics
2 answers:
maks197457 [2]3 years ago
8 0
A. the answer is the first one
r-ruslan [8.4K]3 years ago
7 0

a. the answer is the first one

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The size of a TV is measured by its diagonal. You want to buy a TV that has a 32-inch screen and a height of 15.7 inches. What i
MrRissso [65]
Think of the space created with the diagonal line like a triangle. There are three sides. the longest side, the diagonal line is 32 inches. one of the other sides is 15.7 inches. Using Pythagoras theorem, we know that a^2 + b^2 = c^2, where c is the longest side of the triangle (32inches) and either a or b is 15.7inches. let's say that a is 15.7 inches. if we substitute these values we just assigned to a and c into Pythagoras' theorem above, we get 15.7^2 +b^2 = 32^2. we can simplify this to 246.49 + b^2 = 1024. We then subtract 246.49 from both sides of the equation to get b^2 = 777.51. we then square root both sides of the equation to get b = 27.88 (rounded to 2 decimal places). because b is the width of the TV, the width of the TV is 27.88 inches.
{a}^{2}  +  {b}^{2}  =  {c}^{2}  \\  {15.7}^{2}  +  {b}^{2}  =  {32}^{2}  \\ 246.49 +  {b}^{2}  = 1024 \\  {b}^{2}  = 777.51 \\ b =  \sqrt{777.51}  \\ b = 27.88
5 0
3 years ago
Read 2 more answers
Pls help asap I will give brainerlist plus 25 points
kirza4 [7]

PEMDAS - Parenthesis, Exponents, Multiplication, Division, Addition, and Subtraction

First, we do the exponents.

5² - 4 · 6 + 11

= 25 - 4 · 6 + 11

Next, multiplication (according to PEMDAS).

= 25 - 24 + 11

Although PEMDAS says addition then do subtraction, please note that this is totally interchangeable. For the sake of this problem, subtraction will be done first.

= 25 - 24 + 11

= 1 + 11

Finally, addition.

= 12

This is your answer. Happy studying~

6 0
3 years ago
Read 2 more answers
Thank you, please show me the steps.
Lady bird [3.3K]
V=(1/3)hpir^2
d/2=r
2.75/2=1.375
to make volume 4 times more
multiply height by 4 or multiply radius by 2
example
find current cup volume
V=(1/3)2.75pi1.375^2=2.2057291666666pi

if we times height by 4
3.5*4=14
V=(1/3)14pi1.375^2=8.822916666666666666pi

if we times radius by 2
1.375*2=5.5
V=(1/3)3.5pi5.5^2=8.822916666666666666pi


we can show it is 4 times by
8.822916666666666666pi/2.2057291666666pi= 3.99999 close enough
dimentions are

diameter of 2.75in and height of 11in or
 diameter of 5.5in and height of 3.5 in


7 0
3 years ago
Janette has 386 pennies. 58 nickels and 19 dimes If Janette exchanges her coins for​ dollars, how many dollars will she have? Ho
svet-max [94.6K]

Answer:

$8 ; 66 cents

Step-by-step explanation:

Given that:

Worth of penny, dimes and Nickel in cents and dollars

Nickel, n = 5 cents = $0.05

Dimes, d = 10 cent = $0.1

Penny, p = 1 cent = $0.01

Multiplying the number of each coin with its respective value ;

386(0.01) + 58(0.05) + 19(0.1)

$3.86 + $2.9 + $1.9

= $8.66

Changing it to dollar ,

$8.66 dollars = 8 dollars ;

$0.66 = 66 cents

6 0
3 years ago
The point (x, 5/2) lies on the graph of y = x - 1/2. The value of x is 3 2 -3
Iteru [2.4K]
X=3
5/2=x-1/2
5/2+1/2=x
3=x

5 0
3 years ago
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