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vazorg [7]
2 years ago
9

HELLLPPPPPPPP!!!!!!!!!!!!!!!!!!!!! I WILL GIVE BRAINLIEST!!!!!!!!!! I WILL GET GROUNDED IF I DON'T GET THIS TURNED IN!!!!!!!!!!!

!!
A newspaper reports the following changes in the temperature of a city over 4 days:

3.24 degrees Celsius, negative 3 over 8 degrees Celsius, −0.15 degrees Celsius, 7 over 9 degrees Celsius

Write an expression to show the average daily change in the temperature of the city.

Write the steps to solve the expression. Round your answer to the nearest hundredth. (10 points)
Mathematics
2 answers:
kupik [55]2 years ago
4 0

Answer:

It is 0.873 but rounded to hundredth is 0.87

Step-by-step explanation:

expression: (3.24-3/8+7/9-0.15) divided by 4

Solve:  (3.24+7/9-3/8-0.15) divided by 4

= (3.24+0.78-0.375-0.15) divided by 4

=3.49/4

-0.873 = 0.87 to the nearest hundred

degress celcius

r-ruslan [8.4K]2 years ago
3 0

Answer:

To find the average of anything you find the mean so 3.24+-3/8+-0.15+7/9 all divided by 4 as that's the number of days you want to find the average of =0.87° degrees

So 0.87 degrees is the average temperature for the 4 days

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A construction company showed that the strength, y, of concrete, measured
Vilka [71]

Answer:

  a) y-intercept = 17; initial design strength percentage

  b) slope = 2.8; increase in that percentage each day

  c) 29.6 days to 100% design strength

Step-by-step explanation:

a, b) The equation is in the form called "slope-intercept form."

  y = mx + b

where the slope is m, and the y-intercept is b.

Your equation has a slope of 2.8 and a y-intercept of 17.

The y-intercept is the percentage of design strength reached 0 days after the concrete is poured. The strength of the concrete when poured is 17% of its design strength.

The slope is the percentage of design strength added each day after the concrete is poured. The concrete increases its strength by 2.8% of its design strength each day after it is poured.

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c) To find when 100% of design strength is reached, we need to solve for x:

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The concrete will reach 100 percent of its design strength in about 30 days.

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