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mylen [45]
3 years ago
11

When t = -3 Work out the value of 4t squared – 6

Mathematics
2 answers:
vesna_86 [32]3 years ago
6 0

Answer:

-42

Step-by-step explanation:

t^2^=-9

4x-9=-36

-36-6=-42

Vaselesa [24]3 years ago
3 0

Answer:

30

Step-by-step explanation:

4(-3)^2-6

4(9)-6

36-6

30

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2 years ago
A partial sum of an arithmetic sequence is given. Find the sum.
Nezavi [6.7K]

Answer:

72.3

Step-by-step explanation:

Given that:

The arithmetic sequence:

\sum \limits ^{14}_{k=0} (3 + 0.26k)

The first term of the sequence a_0 = 3 since k = 0

i.e (3 + 0.26(0)) = 3

The last term of the sequence a_{14} = 6.64

i.e (3+ 0.26(14)

= (3 + 3.64)

= 6.64

Total no of terms = 15 i.e from 0 to 14

∴

The partial sum of the arithmetic sequence = \dfrac{Total \ no \ of \ terms }{2}  \times (a_o+a_{15})}

=\dfrac{15 }{2}  \times (3+6.64)}

= 72.3

3 0
2 years ago
Alan rode his bike for 5 1/5 hours during one week. That same week, Brook rode her bike for 6 1/8 hours. How many more hours did
melomori [17]

Answer:

1-8 =7 duh

Step-by-step explanation:

6 0
2 years ago
Using the information that 6.7 x 52 = 348.4
Paha777 [63]

Answer:

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Step-by-step explanation:

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Read 2 more answers
Diego was trying to write (5^2)^4 with a single exponent and wrote (5^2)^4=5^2+^4=5^6. What should the answer be? Explain Diego'
o-na [289]

Answer:

5^8

Step-by-step explanation:

Diego added the exponents. This was an error. If he was simplifying

5^2 × 5^4, then he could add the exponents and get a correct answer. But his problem had a power raised to a power. In this case, you multiply the exponents to simplify.

(5^2)^4 means

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which is

5×5×5×5×5×5×5×5

which is 5^8.

4 0
2 years ago
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