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4 years ago

Find the missing number 42+55=55+?

Mathematics

2 answers:

valentinak56 [21]4 years ago

8 0

Answer:

Step-by-step explanation:

nalin [4]4 years ago

6 0

Answer:

Its 42

Step-by-step explanation:

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2. Peter, Jeff, and John, each perform subtraction incorrectly as follows:

grandymaker [24]

Answer:

peter: subtraction mistake at unit place . wrote 6 in place of 9

Jeff: subtraction mistake at tens place: wrote 4 while the correct digit is 3

peter: He has written 3 at unit place while correct digit is 2

John: he has carried 1 twice from 5 at hundred place and then subtracted 2 from it which gives value 1 at hundred place.

Step-by-step explanation:

we have to subtract 503 from 269

4 10 13

503

-269

____

234

Solution

since 3 is less than 9 , we take a carry from 0 but 0 cannot be carries so we take 1 carry from 5\

thus

5 becomes 4, 0 becomes 10,

now 10 can be give 1 carry to 3 at unit place, so 3 becomes 13

now 9 is subtracted from 13

13-4 = 9

this is the mistake of Peter

he has written 6 at unit place which should be

peter: subtraction mistake at unit place . wrote 6 in place of 9

____________________________________________________

since , 1 is carried from 10 at tens place, 9 is left at tens place

so we know subtract 6 from 9 at tens place

9-6 = 3

Here mistake is done by Jeff

Jeff: subtraction mistake at tens place: wrote 4 while the correct digit is 3

________________________________________________

at hundred place,

one is taken from 5 , hence 4 is left at hundred place

we have to subtract 2 from 4

4-2 = 2

hence,

Here, mistake done by both both Peter and jeff

peter: He has written 3 at unit place while correct digit is 2

John: he has carried 1 twice from 5 at hundred place and then subtracted 2 from it which gives value 1 at hundred place.

4 0

4 years ago

What is the equation of a circle that has a center at (-4, 10) and a radius of 8?

mars1129 [50]

Answer:

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

Step-by-step explanation:

Equation of a circle:

The equation of a circle with center $(x_0,y_0)$ and radius r is given by:

$(x - x_0)^2 + (y - y_0)^2 = r^2$

Center at (-4, 10)

This means that $x_0 = -4, y_0 = 10$ .

Radius of 8:

This means that $r = 8$ . So

$(x - x_0)^2 + (y - y_0)^2 = r^2$

$(x - (-4))^2 + (y - 10)^2 = 8^2$

$(x + 4)^2 + (y - 10)^2 = 64$

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

3 0

3 years ago

To get to school each morning, Vanessa takes a horse 19.33 miles and a train 2.27 miles. In total the journey takes 26.48 minute

yarga [219]

The journey is 21.6 miles in total

5 0

3 years ago

Read 2 more answers

The ratio of the radii of two circles is 2:3. The diameter of the smaller circle is 15 mm. What is the length of the diameter of

mixer [17]

The answer is 11.25 mm.

A diameter of a circle is twice of its radius: d = 2r ⇒ r = d/2

small circle large circle
radius: r1 radius: r2 = ?
diameter: d1 = 15 mm
⇒ r1 = d1/2 = 15/2 mm

Since t<span>he ratio of the radii of two circles is 2:3, we have:
r1 : r2 = 2 : 3
which can also be expressed as:
</span> $\frac{r1}{r2}= \frac{2}{3}$
<span>
We know that r1 is 7.5, so let's implement it:
</span> $\frac{7.5}{r2} = \frac{2}{3}$

Let's multiply both sides of the by 3r2:
$3r2* \frac{7.5}{r2} =3r2* \frac{2}{3}$
⇒ $3 * 7.5 = 2*r2$
$22.5 = 2*r2$
⇒ $r2= \frac{22.5}{2} =11.25 mm$

5 0

4 years ago

Read 2 more answers

A leak in a water tank causes the water level to decrease by 3.6×10−2 millimeters each second. About how many millimeters does t

frutty [35]

The correct answer is 6.5 x 10^2.

We have the amount for 1 second. To convert to 5 hours, we need to multiply it by 60 and 60 and 5.

0.036 x 60 x 60 x 5 = 648

Or about 6.5 x 10^2

3 0

3 years ago