3 years ago

Plz plz help its shapes!!!! ill give u brainy !!!!!!

Mathematics

1 answer:

Bond [772]3 years ago

4 0

Answer:

Names that describe the shape- Trapezoid, Quadrilateral

Names that don't describe the shape- Square, Rectangle, Parallelogram and rhombus

Step-by-step explanation:

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T × 3/5 for t =8/9 pleas help

Korolek [52]

$\frac{8}{9} * \frac{3}{5}= \frac{24}{45}
$ which reduces to $\frac{8}{15}$

4 0

3 years ago

A fish swims upstream a distance of 16 miles in a river with a current of 3 miles per hour. The fish returns swimming

arlik [135]

Answer:

9 mph = the speed in still water

Step-by-step explanation:

Let r = the speed in still water

Then the speed going down stream is r + 3

and the speed going upstream is r - 3

d = rt or t = d/r

time going downstream is 16/(r + 3) and time going upstream is 16/(r - 3)

The total time was 4 hours, so

$\frac{16}{r + 3} + \frac{16}{r - 3} = 4$ Multiply thru the equation by (r + 3)(r - 3)

Then 16(r - 3) + 16(r + 3) = 4(r + 3)(r - 3)

16r - 48 + 16r + 48 = $4r^{2}$ - 36

$4r^{2}$ - 36 = 32r

$4r^{2}$ - 32r - 36 = 0

$4(r^{2} - 8r - 9) = 0$

4(r - 9)(r + 1) = 0

r = 9 or -1

But a rate of speed cannot be negative, so x ≠ -1

So, r = 9 mph = the speed in still water

7 0

3 years ago

A bag contains 8 red marbles, 3 blue marbles and 5 green marbles. If three marbles

dangina [55]

Answer:

4/9

Step-by-step explanation:

8 0

3 years ago

Solve only if you know the answer : 2/f * 5/8

mixer [17]

Answer:

5/4f i think

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Laws of exponents:<br>Squares and Square roots:<br><br>√9a¹⁶b³⁶

Nadusha1986 [10]

Step-by-step explanation:

Square root is equivalent to 1/2 power:

${(9 {a}^{16} {b}^{36} )}^{ \frac{1}{2} }$

Square root of 9 is 3. Multiply the exponents by 1/2 to get:

$3{a}^{8} {b}^{18}$

8 0

3 years ago