3 years ago

This graph gives the temperature of Substance B over time.

Mathematics

1 answer:

Serjik [45]3 years ago

4 0

Answer:

The slope is (4) which means that the temperature (increases) by (4) degrees every minute

Step-by-step explanation:

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During one snowy month a kentucky school held classes 9/11 of possible the school days if there are 22 possible school days how

SOVA2 [1]

This question isn't phrased correctly, but I will assume it's asking about common denominators with fractions.

9/11 1/22

18/22 1/22

18 school days.

5 0

3 years ago

I really need help with this. You can answer this at any time if you want.

Tcecarenko [31]

Answer:

1. a 3d rectangle

2. 40 in cubed

3. repeat

4. another repeat

Step-by-step explanation:

8 0

3 years ago

A first number plus twice a second number is 24. twice the first number plus the second totals 21. find the numbers.

Ulleksa [173]

We do like the following:
Set the first number is a and the second is b.
We have two equations: a+2xb=24, 2xa+b=21
And we have 2xa+4xb=48 or 2xa=48-4xb
So: 48-4xb+b=21 or -3xb=21-48=-27 and we got b=-27:(-3)=9 and a= 6
a=6 and b=9

4 0

3 years ago

If DX/DT= 2cm/s x=-1 y=x^2+1 DY/DT=??

kobusy [5.1K]

Answer:

$\frac{dy}{dt}$ = - 4 cm/s

Step-by-step explanation:

Let us revise the chain rule

If $\frac{dy}{dt}$ = a and $\frac{dx}{dt}$ = b, then

$\frac{dy}{dx}$ = $\frac{dy}{dt}$ ÷ $\frac{dx}{dt}$ = $\frac{a}{b}$

∵ y = x² + 1

- Use the differentiation to find $\frac{dy}{dx}$

∴ $\frac{dy}{dx}$ = 2x

∵ x = -1

- Substitute x by -1 in $\frac{dy}{dx}$

∴ $\frac{dy}{dx}$ = 2(-1)

∴ $\frac{dy}{dx}$ = -2

∵ $\frac{dy}{dt}$ = $\frac{dy}{dx}$ × $\frac{dx}{dt}$

∵ $\frac{dx}{dt}$ = 2 cm/s

∴ $\frac{dy}{dt}$ = (-2) × (2)

∴ $\frac{dy}{dt}$ = - 4 cm/s

8 0

3 years ago

Reuben walks 2.5 km every day. How far does he walk in 7 days? Write your answer in meters.

Fed [463]

Answer:

1day=2.5km

7days=?

7×2.5

=17.5km

1km=1000m

27.5km=?

=27500m

5 0

3 years ago