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agasfer [191]
3 years ago
9

Insert the parenthesis to make the equality right:630÷7÷2⋅9⋅25=125

Mathematics
1 answer:
andrew-mc [135]3 years ago
8 0

Answer:

(630 ÷ 7) ÷ (2 ⋅ 9) ⋅ 25 = 125

Step-by-step explanation:

630 ÷ 7 ÷ 2 ⋅ 9 ⋅ 25 = 125

(630 ÷ 7) ÷ (2 ⋅ 9) ⋅ 25 = 125

         90 ÷ 18 ⋅ 25 = 125

           5 ⋅ 25 = 125

               125 = 125

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1) write the equation of the
Helen [10]

Answer:

y=3/2x-2

Step-by-step explanation:

Find the slope first:

m=\frac{y_{2-y_{1} } }{x_{2}-x_{1}  } =\frac{1-(-2)}{2-0}=\frac{3}{2}

Then solve for y-intercept:

y=\frac{3}{2}x+b\\-2=\frac{3}{2}(0)+b\\-2=b

Now, write out your complete equation:

y=3/2x-2

6 0
3 years ago
PLEASE SOLVE FOR B. PLEASE HELP VERY URGENT!
aleksklad [387]

Answer:

b1 = (2A/ h) - b2

Step-by-step explanation:

A  = 1/2 h(b1 + b2)

b1 + b2 = A / 1/2h = 2A/h

b1 = (2A/ h) - b2

4 0
3 years ago
Find the value of x so the figures have the same area
polet [3.4K]

Answer:

B) 4.5

Step-by-step explanation:

The area of the first figure is 10x

The area of the second figure is 6(x+3)=6x+18

To solve, find the x that makes 10x=6x+18

   1) 10x=6x+18

   2) 4x=18

   3) x=4.5

To check work)

   1) 10(4.5)=6(4.5)+18

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   3) 45=45

4 0
3 years ago
Bill wants to post three parcels.
ad-work [718]
The answer should be £6.70
3 0
3 years ago
On the first part of her trip Natalie rode her bike 16 miles and on the second part of the trip she rode her bike 42 miles. Her
-BARSIC- [3]

Answer:

14 mph   ( average speed during the second part of the trip )

Step-by-step explanation:

Let´s call  "x"  the average speed during the first part then

t = 5 hours

t  =  t₁  +  t₂        t₁   and  t₂   times during part 1 and 2 respectively

l = t*v           (  distance is speed by time )      t =  l/v

First part

t₁  = 16/x        and      t₂  = 42 / ( x + 6)

Then

t =   5   =  16/x   +   42 /(x + 6)

5 = [ 16 * ( x  +  6 ) +  42 * x ] / x* ( x + 6 )

5 *x * ( x + 6 )  =  16*x  + 96 +  42 x

5*x² + 30*x  - 58*x - 96  =  0

5*x²  -  28*x  -  96  =  0

We obtained a second degree equation, we will solve for x and dismiss any negative root since negative time has not sense

x₁,₂  =   [28 ± √ (28)² + 1920  ] / 10

x₁,₂  = ( 28  ± √2704 )/ 10

x₁  = 28  -  52 /10        we dismiss that root

x₂  = 80/10

x₂  =  8 mph       average speed during the first part, and the average speed in the second part was 6 more miles than in the firsst part. then the average spedd dring the scond part was 8 + 6 = 14 mph

6 0
3 years ago
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