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anyanavicka [17]
3 years ago
8

Solve -9+2.5y-0.7y+1+6.4y2

Mathematics
1 answer:
-Dominant- [34]3 years ago
3 0

Collect like terms

(-9 + 1) + (2.5y - 0.7y) + 6.4y^2

Simplify

-8 + 1.8y + 6.4y^2

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Step-by-step explanation:

Multiply 0.60 with 43

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1.628 &gt; 1.63<br><br><br>I don’t understand math I’m sorry-
Lina20 [59]

Answer:

So that's actually not true. When comparing decimals you should compare each digit. Remember adding a 0 at the end does not change the value of the decimal. So lets look at it up and down:

remember line up the decimal to decimal

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now let's look at the third digit.

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In an area of Russia records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per
skelet666 [1.2K]

Answer:

Option d.

Step-by-step explanation:

The equation of the line of least squares is given as

\hat{y} = -9.12+ 4.38x

where \hat{y} is the yield of wheat (bushels per acre) and x is the rainfall (in inches).

We need to find the expected number of inches of rain if the yield is 60 bushels of wheat per acre.

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60= -9.12+ 4.38x

Add 9.12 on both sides.

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69.12=4.38x

Divide both sides by 4.38.

\frac{69.12}{4.38}=x

x\approx 15.78

The expected number of inches of rain is 15.78.

Therefore, the correct option is d.

3 0
3 years ago
Celia hiked at a constant rate of 15 miles per day for 6 days. How many miles did Celia hike during that time?
igomit [66]
The answer is D. 90 miles. You can figure this out by multiplying 15 by 6, as Celia hiked 15 miles every day for 6 days, so 15, 6 times, and 15 x 6 = 90.
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