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2 years ago

15

Awnser These Do not just right What or something or i will report!

2 answers:

hram777 [196]2 years ago

4 0

35.) 37

36.) 5

37.) 10

38.) 4

39.) -3

Hope this helps!

Brrunno [24]2 years ago

3 0

1. 37
2. 5
3. 10
4. 4
5. -3

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How do you round 38.25

solniwko [45]

Because its under 6 you must round it down to 38.20 if it was 38.68 for example it would be 38.70

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3 years ago

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I have 7 hundreds 3 ones 12 tens and 8 tenths. What number am i?

Anastaziya [24]

Seventy three hundreds one thousand two hundred and eighty

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2 years ago

Х- а<br>x-b<br>If f(x) = b.x-a÷b-a + a.x-b÷a - b<br>Prove that: f (a) + f(b) = f (a + b)

GenaCL600 [577]

Given:

Consider the given function:

$f(x)=\dfrac{b\cdot(x-a)}{b-a}+\dfrac{a\cdot(x-b)}{a-b}$

To prove:

$f(a)+f(b)=f(a+b)$

Solution:

We have,

$f(x)=\dfrac{b\cdot(x-a)}{b-a}+\dfrac{a\cdot (x-b)}{a-b}$

Substituting $x=a$ , we get

$f(a)=\dfrac{b\cdot(a-a)}{b-a}+\dfrac{a\cdot (a-b)}{a-b}$

$f(a)=\dfrac{b\cdot 0}{b-a}+\dfrac{a}{1}$

$f(a)=0+a$

$f(a)=a$

Substituting $x=b$ , we get

$f(b)=\dfrac{b\cdot(b-a)}{b-a}+\dfrac{a\cdot (b-b)}{a-b}$

$f(b)=\dfrac{b}{1}+\dfrac{a\cdot 0}{a-b}$

$f(b)=b+0$

$f(b)=b$

Substituting $x=a+b$ , we get

$f(a+b)=\dfrac{b\cdot(a+b-a)}{b-a}+\dfrac{a\cdot (a+b-b)}{a-b}$

$f(a+b)=\dfrac{b\cdot (b)}{b-a}+\dfrac{a\cdot (a)}{-(b-a)}$

$f(a+b)=\dfrac{b^2}{b-a}-\dfrac{a^2}{b-a}$

$f(a+b)=\dfrac{b^2-a^2}{b-a}$

Using the algebraic formula, we get

$f(a+b)=\dfrac{(b-a)(b+a)}{b-a}$ $[\because b^2-a^2=(b-a)(b+a)]$

$f(a+b)=b+a$

$f(a+b)=a+b$ [Commutative property of addition]

Now,

$LHS=f(a)+f(b)$

$LHS=a+b$

$LHS=f(a+b)$

$LHS=RHS$

Hence proved.

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2 years ago

A vertical plane passes through a pyramid that has a horizontal base. which of the following can be produced from the intersecti

Inessa [10]

Answer with explanation:

Pyramid and Plane both are three dimensional shapes.

Pyramid is a three dimensional shape having base any polygon and other faces as triangles.

The base of pyramid is horizontal.

1. If lower base is a Square,or rectangle or any other parallelogram

And, then , plane cuts the pyramid vertically

It will be also, a three dimensional shape ,resembling a triangular cross section in three dimension.

Triangle is appropriate choice.

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2 years ago

a well is being dug into the ground. the well needs to reach the depth of 120 feet. a machine can dig down in 12 minutes. what i

vladimir1956 [14]

Answer:

10 feet

Step-by-step explanation:

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2 years ago