11 divided by 23.11=

NO LINKS!! Determine whether the solid is a polyhedron. If it is, name the polyhedron. If not, write no.

max2010maxim [7]

Definition :-

When many plain surfaces combine eachother yielding staright edges ,sharp vertices is called polyhedron .

Example-cube

#1

Yes

It's cuboid or rectangular prism

#2

No

It has circular shapes ,no sharp edges

#3

No

It has a sharp vertice but no staright edges .

#4

Yes

It has flat base and sharp edges also staright edges

Hexgonal pyramid

4 0

2 years ago

Read 2 more answers

Answer this question

Lerok [7]

Answer:

x = 10

Step-by-step explanation:

3x - 5 = 2x + 5

Both triangles equal 25

Subtract 2x → You get left with x

x -5 = 5

Add five... which leaves you with↓

x = 10

Then substitute x for 10

(3 · 10) - 5

25

(2 · 10) + 5

25

You know this is true because they equal each other.

I hope this could help!!

3 0

2 years ago

Maria is installing gutters on her rectangular shed that measures 10 ft by 9 ft she has 23 ft of gutter already and need to purc

Paha777 [63]

Answer:

Maria needs 3 lengths of gutter of finish the shed.

Step-by-step explanation:

We need to calculate the perimeter of the rectangular shed to know how much 5 feet gutter is needed.

The perimeter of the shed is p = 2(l + b) where l = 10ft and b = 9 ft

p = 2(10 + 9) = 2(19) = 38 ft

Now, the perimeter of the shed also equal 23 ft of gutter already installed plus 5x ft gutter where x = number of gutters.

So 23 + 5x = 38

collecting like terms, we have

5x = 38 - 23

5x = 15

dividing through by 5 we have

5x/5 = 15/5

x = 15/5

x = 3

So, Maria needs 3 lengths of gutter of finish the shed.

8 0

3 years ago

Phyllis invested 50000 dollars, a portion earning a simple interest rate of 5 percent per year and the rest earning a rate of 7

Elodia [21]

Answer:

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

Step-by-step explanation:

we know that

The simple interest formula is equal to

$I=P(rt)$

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

Let

x-----> the amount invested at 5%

50,000-x -----> the amount invested at 7%

so

$t=1\ year\\ I=\$2,720\\r_1=0.05\\r_2=0.07\\P_1=\$x\\P_2=\$(50,000-x)$

substitute in the formula above

$2,720=x(0.05*1)+(50,000-x)(0.07*1)$

solve for x

$2,720=0.05x+3,500-0.07x$

$0.07x-0.05x=3,500-2,720\\0.02x=780\\x=\$39,000$

$(50,000-x)=\$11,000$

therefore

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

5 0

3 years ago

Which of the following is a solution to the equation x - 5/7 = -3/7

podryga [215]

Solve the equation:

      5       3
x – —— = – ——
      7       7

   5
Add —— to both sides, so you get x isolated at the left-hand side:
   7

      5       5       3 5
x – —— + —— = – —— + ——
      7        7           7       7

          3 5
x = – —— + ——
      7    7

Now, add those fractions at the right-hand side of the equation:

          – 3 + 5
x = —————
         7

        2
x = ——    <——— this is the answer (first option: 2/7).
        7

I hope this helps. =)

8 0

3 years ago