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Deffense [45]
3 years ago
12

explain how you can use multiplication to find the quotient 3/5 divided by 3/15 then evaluate the expression

Mathematics
1 answer:
lawyer [7]3 years ago
5 0
To divide by a fraction, simply multiply by its reciprocal.
So 3/5 divided by 3/15 is the same as 3/5 multiplied by 15/3.
To multiply the fractions, just multiple the numerators together and multiply the denominators together.
3/5 * 15/3 = 45/15
Simply the fraction by dividing top and bottom by 15 giving
3/1
and 3/1 is equal to 3

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Find the surface area of the building - (not including what is on the ground, as if we were going to paint it)
Rufina [12.5K]

Answer:

204.4m

Step-by-step explanation:

formula for SA of a rectangle is 2lw+2lh+2hw

so it would be 2(6x5) +2(6x3)+2(5x3)=126m

formula for SA of a triangle is bh+2ls+lb

so it would be 5x2+2(6x3.2)+6x5=78.4m

then add 78.4+126=204.4m

5 0
3 years ago
Hi can i calculate difficult maths question
Juli2301 [7.4K]

Answer:

I think you could if you tried.


4 0
3 years ago
Please help me I am horrible at calculations<br> Solve for x when y=-0.27<br><br> 5y+8(x−3y)=7x−12
expeople1 [14]

Answer:

X = -12.54 (I am a Math Class Topper in both 6th Grade an 7th Grade)

Step-by-step explanation:

5 x .27 = 1.35

8x - (3 x .27) = .81

1.35 + 8x - .81 = 7x - 12

        - 7x           - 7x

----------------------------------

1.35 + X - .81 = -12

              + .81 +.81

---------------------------

1.35 + X = -11.19

-1.35         -1.35

-----------------------

X = -12.54

6 0
4 years ago
How would the domain and range of the function y = one-fourth x minus 6 be determined? Explain.
Liono4ka [1.6K]

Answer:

Domain = ( -∞ , ∞ )

Range = ( ∞ , ∞ )

Step-by-step explanation:

A function is given to us and we need to find the domain and range of the given function .

<u>The </u><u>function</u><u> </u><u>:</u><u>-</u><u> </u>

\rm \implies y = \dfrac{1}{4}x - 6

Definitions :-

  1. <u>Range </u>:- The range is the set of all valid y values .
  2. <u>Domain</u> :- All real numbers except where the expression is undefined.

In this case, there is no real number that makes the expression undefined. Therefore the domain will be :-

<u>Domain</u><u> </u><u>:</u><u>-</u><u> </u>

\rm Domain = ( -\infty , \infty )

or

\rm Domain = \{ x | x \in \mathbb{R} \}

<u>Range </u><u>:</u><u>-</u><u> </u>

\rm Range = ( -\infty , \infty )

or

\rm Range = \{ y | y \in \mathbb{R}\}

4 0
3 years ago
A train traveling nonstop to its destination is able to make the trip at an average speed of 70 miles per hour. On the return tr
larisa86 [58]

Answer:

Return trip travel time: 7h

Step-by-step explanation:

Let d be the distance.

Index 1 refers to initial trip, index 2 refers to the return trip.

v1=70mi/h

v2=40mi/h

t2=t1+3h, or t1=t2-3h (travel times)

d=v1×t1=v2×t2

v1×(t2-3)=v2×t2

v1 t2 -3 v1=v2 t2

v1 t2 - v2 t2=3 v1

t2(v1-v2)=3v1

t2=3v1/(v1-v2)

Or

t2=3×70/(70-40)=3×70/30=7h

3 0
4 years ago
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