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4 years ago

Draw 280 with base 10 blocks. can anybody help

Mathematics

1 answer:

swat324 years ago

3 0

Draw 10 28 times that will probably work

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A square tile measures 12 inches by 12 inches. Each unit on a coordinate grid represents 1 inch. (1,1) and (1,13) are two of the

klio [65]

The two other points would be (13,1) and (13,13) because the square tile is 12 inches on each side.

4 0

3 years ago

Read 2 more answers

ritu can row downstream 20km in 2 hrs and upstream 4km in 2 hrs. find the speed of rowing in still water and the speed of the cu

Marina CMI [18]

Answer:

Speed of boat in still water is 6km/h

Speed of current is 4km/h

Step-by-step explanation:

We know speed = distance / time

Let the speed of boat in still water be x

Let the speed of current be y

Hence the speed of boat, down stream = $x+y$

Distance downstream = 20km

Time taken = 2 hours

We have

$x+y=\frac{20}{2}$

$x+y=10$ ......(1)

Speed of boat upstream = $x-y$

Distance upstream = 4

Time taken = 2

We have

$x-y=\frac{4}{2}$

$x-y=2$ ...(2)

Adding (1) & (2)

$2x=12$

$x=6$

Substituting in (1) we get

$y=4$

7 0

3 years ago

Solve for x Question: 2x/3 -x/5 =7

iris [78.8K]

Answer:

$(2x \times 5 - x \times 3 ) \\ \div 15 = 7 \\ \\ 10x - 3x = 7 \times 15 \\ 7x = 105 \\ x = 105 \div 7 \\ x = 15$

8 0

4 years ago

2x-ay=3 8x-12y=b I'm supposed to find what a-b equals.

PolarNik [594]

Answer:

Step-by-step explanation:

3 0

3 years ago

What is the integral of ln(sqrt t)/t?

Alina [70]

∫ [ln(√t) / t] dx
let √t = u
t= u² → dx = 2u du
substitute in the integral
∫ [ln(√t) / t] dx = ∫ (ln u / u²) 2u du = ∫ (ln u / u²) 2u du = 2 ∫ (ln u / u) du
let ln u = x → d (ln u) = dx→ (1/u)du = dx
substituting again
2 ∫ (ln u / u) du = 2 ∫ x dx= 2 x²/ 2 = x² + c which,
substituting ln² u + c
as of the first substitution ln²(√t) + c
it concludes that
∫ [ln(√t) / t] dx = ln²(√t) + c
hope it helps

8 0

4 years ago