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Rus_ich [418]
2 years ago
5

Roger is 16 years old. His sister Betty is 3 years more than half of his age. Write a numerical expression to represent Betty's

age.
Mathematics
2 answers:
BlackZzzverrR [31]2 years ago
6 0

Answer:

11

Step-by-step explanation:

16/2 + 3 = 11

Hope this helps

Anton [14]2 years ago
3 0

Answer:

11

Step-by-step explanation:

(16-8) + 3 = 11

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[URGENT]
Blizzard [7]

When you write URGENT the Brainly cops think you may be taking a test.

y = ax² + c thru (-1,4) and (0,8)

Substituting in the coordinates of each point for x and y gives two equations:

4 = a  (-1)² + c

8 = a (0²) + c = c

From the second one we see c=8.  Substituting into the first one,

4= a + 8

a = 4-8 = -4

Answer: a=-4, c=8

Check:

f(x) = -4x² + 8

f(0) = 8, good

f(-1) = -4(1) + 8 = 4, good

5 0
3 years ago
An online test of English spelling looked at how well people spelled difficult words. The bar graph to the right shows how many
sweet-ann [11.9K]

Answer:

60 ; 5220

Step-by-step explanation:

A) From the horizontal bar chart provided, it could be inferred that 85 people spell the word 'weird' correctly. The graph is scaled on a fixed interval of 10. Hence, the midpoint of 10 = 5

(80 + 5) = 85

B) In a group consisting of 8719 randomly selected people estimate how many more people can correctly spell weird than inoculate

From the graph :

85 per 100 could spell weird correctly while,

About 25 per 100 could spell inoculate correctly.

Difference In number per 100 people

(85 - 25) = 60 people per 100

We could round 8719 to the nearest 100 = 8700

Number of 100's in 8700 = 8700/100 = 87

(87 × 60) = 5,220 people

4 0
3 years ago
The question about the metrologist
nadezda [96]
12% aka 12 days it didn't rain 

3 0
3 years ago
It says that it’s wrong
pochemuha

Answer:

cool

Step-by-step explanation:

what says what is wrong?

3 0
2 years ago
Read 2 more answers
Suppose that the probability a seed will germinate is 85%. What is the probability that 7 of these seeds will germinate when 10
Viktor [21]
Total number of outcomes of 7 from 10 = 10*9*8 / 3*2*1  = 120
probability of each outcoe is 0.85^7* (0.15)^(3)  = 0.0010819

Required probability = 120 * 0.0010819 =  0.1298
6 0
3 years ago
Read 2 more answers
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