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3 years ago

15

What is -7+(-2)? I got nine but I'm not sure if that's correct.

2 answers:

horrorfan [7]3 years ago

8 0

It's actually (-9)... think of it as a hot air balloon, the positivies being balloons and the negatives being sandbags or weights.
You have 7 sandbags/weights and add 9 more sandbags/weights, causing u to go lower, therefore, *negative* 9
Hope that helped! :))

Pavel [41]3 years ago

6 0

-9
If you look at a number line, then if you put your finger on negative 2 and subtract 7, then you will land on -9. Also the equation is the same as -7-2 which equals -9

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The temperature started at 82° and continued to rise at a rate of 0.6° each hour the temperature is now 85° determine the number

Gnesinka [82]

Answer:

5 hours

Step-by-step explanation:

Our goal here is 3 F because 82+3=85

Ok so you start at 82. For example, you can do 0.6×1=0.6 (no)

0.6×2=1.2 (no)

0.6×3=1.8 (no)

0.6×4=2.4 (no)

0.6×5=3 (yes)

82°+3°=85°

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2 years ago

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

Minchanka [31]

Answer:

Step-by-step explanation:

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4 0

3 years ago

2 to the power of 14

mrs_skeptik [129]

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6 0

2 years ago

Read 2 more answers

What is the common ratio of the geometric sequence below? –2, 4, –8, 16, –32, ...

SOVA2 [1]

Answer:

The common ratio of the geometric sequence is:

$r=-2$

Step-by-step explanation:

A geometric sequence has a constant ratio 'r' and is defined by

$a_n=a_1\cdot r^{n-1}$

where

aₙ is the nth term

a₁ is the first term

r is the common ratio

Given the sequence

$-2,\:4,-8,\:16,\:-32,\:...$

Compute the ratios of all the adjacent terms: $r=\frac{a_n+1}{a_n}$

$\frac{4}{-2}=-2,\:\quad \frac{-8}{4}=-2,\:\quad \frac{16}{-8}=-2,\:\quad \frac{-32}{16}=-2$

The ratio of all the adjacent terms is the same and equal to

$r=-2$

Therefore, the common ratio of the geometric sequence is:

$r=-2$

5 0

2 years ago

Lin scored 18 marks in a test and Jon scored 12 marks.

saw5 [17]

Answer:

=60

Step-by-step explanation:

18 + 12

=30

18/30 × 100%

=60

8 0

2 years ago