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4 years ago

Explain how to use the break apart strategy to find 247+38

1 answer:

5 0

So you would break 247 in to 200,40and 7
u would break 38 into 30 and 8 . so when you as then together you get and sum of 285 .so do you know the strategy now ??

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A participant in a 21-mile walkathon walks at a steady rate of 3 per hours. He thinks, "the relationship between the number of m

Gnom [1K]

Answer:

Yes. I agree with his claim because the equation relating the miles left to walk and the number of miles left to walk is : $y=-3t+21$

Step-by-step explanation:

Given :

It's a 21 - mile walkathon
The rate at which he is moving is 3 miles per hour.

Let the number of miles walked be $x$ ;

∴,

The number of miles ' $y$ ' left to walk will be : $y=21-x$

Thus the time ' $t$ ' for which he walked :

$t=\frac{distance}{speed} \\t=\frac{x}{3}$ :

∴

From these equations , we get :

$x=21-y\\x=3t\\21-y=3t\\y=21-3t$

Thus , when we compare this with $y=mx+c$ ,

$y=mx+c\\y=-3t+21\\m=-3,c=21$

Thus this is an equation of a Line with slope -3.

3 0

3 years ago

Anyone know the answer to 13x-4=11x+10-8

damaskus [11]

Answer:

Step-by-step explanation:

13x - 4 = 11x + 2

2x - 4 = 2

2x = 6

x = 3

6 0

3 years ago

Find the area of the triangle. Round your answer to the nearest tenth. Triangle ABC Line AB =15 yd, Line AC = 15 yd, ∠A= 48° a.

neonofarm [45]

Answer:

A = 83.6 yd² ⇒ answer (d)

Step-by-step explanation:

∵ AB = 15 , AC = 15 and m∠A = 48°

∵ Area of the Δ by using sin Rule

∴ A = 1/2 × S1 × S2 × sin including angle between two sides

∴ A = 1/2 × 15 × 15 × sin48 = 83.6 yd² ⇒ answer (d)

3 0

3 years ago

These tables represent an exponential function. Find the average rate of

Varvara68 [4.7K]

Answer:

Since, we are given table for x and y values

and table for average rate of changes

we can see the pattern of average rate of change

average rate of change for 5 to 6 is three times average rate of change for 4 to 5

but we have to find

average rate of change for 7 to 8

so, using same pattern

average rate of change for 6 to 7 is three times average rate of change for 5 to 6

average rate of change for 7 to 8 is 3*3( average rate of change for 5 to 6)

so, we can plug value

average rate of change for 7 to 8 is 3*3*486

average rate of change for 7 to 8 is 4374

so, option-D...........Answer

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Which is the angle of depression from the lighthouse on the boat ?

Anastaziya [24]

Answer:

∠4

Step-by-step explanation:

An angle of depression is measured from the horizontal downwards.

This is ∠4 in the diagram

8 0

3 years ago

Read 2 more answers