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Morgarella [4.7K]
3 years ago
6

Can someone please read that and give me an answer, i’ve been stuck on it for awhile.

Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
4 0

Answer:

after 21 seconds

Step-by-step explanation:

Given

h = - 16t² + 272t + 1344

When the ball strikes the ground then h = 0, that is

- 16t² + 272t + 1344 = 0 ( divide through by - 16 )

t² - 17t - 84 = 0 ← in standard form

(t - 21)(t + 4) = 0 ← in factored form

Equate each factor to zero and solve for t

t - 21 = 0 ⇒ t = 21

t + 4 = 0 ⇒ t = - 4

However t > 0 thus t = 21

The ball strikes the ground after 21 seconds.

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Find the indicated angle or side. Give an exact answer.
nexus9112 [7]

Answer:

√13

Step-by-step explanation:

To get the side a, we will use the cosine rule as shown;

a² = b²+c²-2bcCosθ

Substitute the given values

a² = 5²+(3√2)²-2(5)(3√2)Cos45

a² = 25+18-30√2*1/√2

a² = 25+18-30

a² = 13

a = √13

Hence the value of a is √13

8 0
3 years ago
5 squared is between which two decimals to the tenths place?
Eduardwww [97]

Answer:

Between 2.1 and 2.3

Step-by-step explanation:

<u>Step 1:  Find between which two numbers</u>

<u />\sqrt{5} = 2.23606797749979

2.2360 is between 2.1 and 2.3

Answer:  Between 2.1 and 2.3

6 0
3 years ago
If 2cm rep 24 what length will be rep by 3cm​
sergejj [24]

Answer:

Step-by-step explanation:

So 1cm rep = 24 ÷ 2 = 12

So 3cm rep = 12 x 3 = 36

3 0
3 years ago
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attashe74 [19]

Answer:

1/12

Step-by-step explanation:

5 0
3 years ago
List the factor pairs of ac for the trinomial 12x^2-5x-2.
yKpoI14uk [10]

Answer:

(3x - 2) (4x + 1)

Step-by-step explanation:

12x² - 5x - 2

Since the first term has a coefficient, you need to multiply -2 with 12 to get -24.

Two factors that add up to -5 and have a product of -24 are -8 and 3.

12x² - 8x + 3x - 2

Rearrange the expression to find the GCF.

12x² + 3x - 8x - 2

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3x (4x + 1) - 2 (4x + 1)

(3x - 2) (4x + 1)

3 0
3 years ago
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