All categories

2 years ago

Pleaseeeeeeeeeee helpppppppppppp and show your work plzzz

Mathematics

2 answers:

uysha [10]2 years ago

7 0

First,
We realise the temperature is -4 degrees Celsius. We see that the temperature is negative meaning it’s cold.
The lower the temperature, the colder and the higher the temperature, the hotter.

In the second part, the temperature drops so -7-4=-11

In the third part, the temperature is risen so, -11+3=-8

I hope this helped : )

Digiron [165]2 years ago

3 0

Im probably wrong but i think you would do -4 - 7 + 3 = -8

You might be interested in

Math Lab Review Work

umka2103 [35]

Answer:

I think it C because I know that Nalia isn't correct so it's not D or B.

8 0

3 years ago

What is a rational number between 1/8 and 1/4

Oliga [24]

1/8 , .., 1/4

1/8 = 2/16
1/4 = 4/16

2/16 , 3/16 , 4/16

3 0

3 years ago

If f(x) = 3x2 − 8x, 0 ≤ x ≤ 3, evaluate the Riemann sum with n = 6, taking the sample points to be right endpoints.

denis23 [38]

Split up the interval [0, 3] into 6 subintervals,

[0, 1/2], [1/2, 1], [1, 3/2], [3/2, 2], [2, 5/2], [5/2, 3]

The right endpoints are given by the arithmetic sequence,

$r_i=0+\dfrac i2=\dfrac i2$

with $1\le i\le6$ .

We approximate the integral of $f(x)$ on the interval [0, 3] by the Riemann sum,

$\displaystyle\int_0^3f(x)\,\mathrm dx=\sum_{i=1}^6f(r_i)\Delta x_i$

$\displaystyle=\frac{3-0}6\sum_{i=1}^6\left(3{r_i}^2-8r_i\right)$

$\displaystyle=\frac12\sum_{i=1}^6\left(\frac{3i^2}4-4i\right)$

$\displaystyle=\frac38\sum_{i=1}^6i^2-2\sum_{i=1}^6i$

Recall the formulas,

$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$

$\displaystyle\sum_{i=1}^ni^2=\frac{n(n+1)(2n+1)}6$

Then the value of the integral is approximately

$\displaystyle=\frac38\cdot\frac{6\cdot7\cdot13}6-2\cdot\frac{6\cdot7}2=\boxed{-\frac{63}8}=-7.875$

Compare to the exact value of the integral, -9.

7 0

3 years ago

125 children at summer camp, 45 signed up for swimming, 38 signed up for art. 12 who signed up for swimming also signed up for a

Tasya [4]

45 signed up for swimming and DIDNT sign up for art, the probability of randomly selecting one of these students is 45 out of 125 which reduces down to 9/25

7 0

3 years ago

50 points!!!!!!!

MrMuchimi

They have to travel 135.714286 feet per hour
So probably yes

7 0

2 years ago

Read 2 more answers