All categories

3 years ago

Which shows the best estimate to use to find 43 × 78?

Mathematics

1 answer:

bulgar [2K]3 years ago

7 0

Answer:

The best estimate for 43x78 is 40x80

Step-by-step explanation:

43 rounded to the nearest ten is 40.

78 rounded to the nearest ten is 80.

The answer to 40x80 is 3200

You might be interested in

Sara ran 10km in 2.5 hours. Katerina ran 7.5 km in 2 hours. Candice ran 9.5 km in 2.25 hours. Who had the fastest average speed?

Arisa [49]

10 km ÷ 2.5 hours = 4 km/h — This is Sara's record

7.5 km ÷ 2 hours = 3.75 km/h — This is Katerina's record

9.5 km ÷ 2.25 hours = 4.2 km/h — This is Candice's record

Therefore, the answer is Candice had the fastest average speed.

6 0

4 years ago

20 POINTS An electrician charges a set fee for every house call and then charges an hourly rate depending on how long the job ta

tatuchka [14]

Answer:

$the \: slope \: is \to \boxed{60}$

Step-by-step explanation:

$if \to C=65+60t \\ C=60t + 65 \\ but \: the \: \boxed{ c - intercept} \: is \: in \: the \: form \to \\ c = mt + b \\ hence \to \\ 60t = mt \\ m = \frac{60t}{t} \\ m = 60 \\ the \: slope \: is \to \boxed{60}$

5 0

3 years ago

Read 2 more answers

Please Help me ASAP VERY URGENT

jenyasd209 [6]

Answer:

A= 115 degrees

C= 50 degrees

Step-by-step explanation:

All angles are equal to 180 so the equation is:

180=4x-13+x+18+15

180=5x+20

160=5x

x=32

6 0

3 years ago

Read 2 more answers

Y is directly proportional to the square of x.

RUDIKE [14]

Answer:

The value of y is 847 for x=11

Step-by-step explanation:

It is given that y is directly proportional to the square of x

This can be written mathematically as:

$y \propto x^2$

Removing the proportionality symbol introduces a proportionality constant in the equation which is denoted by k

$y = kx^2$

Given that "When x is 5, y is 175"

$175 = k (5)^2\\175 = k*25\\k = \frac{175}{25}\\k = 7$

Putting the value of k

$y = 7x^2$

Now putting x = 11

$y = 7(11)^2\\y = 7 * 121\\y = 847$

Hence,

The value of y is 847 for x=11

5 0

3 years ago

What is .466666 as a fraction?

katovenus [111]

As a fraction it is 466666/1000000

6 0

3 years ago

Read 2 more answers