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2 years ago

200 is 10 times as much as 20 true

Mathematics

1 answer:

amm18122 years ago

6 0

Answer:

yes

Step-by-step explanation:

20x10= 200 therefor its 10times as much

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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

A triangle has an area of 45 square units. Its height is 10 units.

Degger [83]

Area = (1/2)*base*height

45 = (1/2)*base* 10

45 = base*5

45/5 = base

9 = base

base = 9

The length of the base is 9 units.

7 0

3 years ago

Multiply Which one ??? Please help

vladimir1956 [14]

Answer:

The 3rd one again

Step-by-step explanation:

(a+−2)(8 $a^{2}$ +−5a+3)

=(a)(8 $a^{2}$ )+(a)(−5a)+(a)(3)+(−2)(8 $a^{2}$ )+(−2)(−5a)+(−2)(3)

=8 $a^{3}$ −5 $a^{2}$ +3a−16 $a^{2}$ +10a−6

=8 $a^{3}$ −21 $a^{2}$ +13a−6

hope this helped:)

7 0

2 years ago

What are the factors of the expression x+6x-16

Artist 52 [7]

(X+8) and (x-2) are the favtors

7 0

2 years ago

How do we solve these type of questions

svetoff [14.1K]

In the second equation it is actually going on to be +2x^2 -4x-2 then your going to combine like terms. So it will be 5x^2-10. Because he 4x’s are going to eliminate each other.

4 0

3 years ago