All categories

2 years ago

Write a number sentence to add 6 tens 21

Mathematics

2 answers:

Dahasolnce [82]2 years ago

8 0

6*10+21 IS the number sentence

vfiekz [6]2 years ago

3 0

Answer:

6 tens to 21 = 81

Step-by-step explanation:

Given

6 tens

To write a number sentence to represent the description in the question, follow these steps;

Convert 6 tens to number: From number representation, we know that tens can be replaced by 10;

So,

6 tens = 6 * 10

6 tens = 60

Then we add the result to 21

60 + 21

This gives a result of 81.

So, Addition of 6 tens to 21 is equal to 81

You might be interested in

An account earns simple interest.

olasank [31]

Data:
P (Principal) = $1500
I (Simple Interest) = ?
t (time) = 5 years
r (percentage rate) = 4% = 0.04

Formula:
$I = P*r*t$

Solving (1) <span>Find the interest earned.</span>
$I = P*r*t$
$I = 1500*0.04*5$
$\boxed{\boxed{I = 300}}\end{array}}\qquad\quad\checkmark$

Solution (2) <span>Find the balance of the account.
</span>The future value, (Account), of a loan is given by the equation: A = P + I
$A = P + I$
$A = 1500 + 300$
$\boxed{\boxed{A = 1800}}\end{array}}\qquad\quad\checkmark$

3 0

2 years ago

A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 2 hour 40 min after firs

Nat2105 [25]

Answer:

The speed of the river's current is 4.5 km/hr.

Step-by-step explanation:

Given : A fisherman traveled in a boat from point N upstream.

After having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving N, he was brought back to N by the current.

Knowing that the speed of the boat in still water is 9 km/hour

To find : The speed of the river’s current.

Solution :

Let the speed of current = x km/h

Speed of boat = 9 km/h

Thus, the speed in upstream = (9 - x) km/h

Also, the speed in downstream = x km/h (because the boat is stationary in downstream)

Total distance = 6 km ( from N to the point he reached )

Total time = 2 hours 40 minutes

$\text{2 hours 40 minutes}=2\frac{40}{60}=2 \frac{2}{3} \\\\\text{2 hours 40 minutes}=\frac{8}{3} \text{ hours}$

We know, $\text{Time} = \frac{\text{Distance}}{\text{Speed}}$

According to the question,

$\frac{6}{9-x}+\frac{6}{x}=\frac{8}{3}$

Taking LCM and 6 common

$6[\frac{x+9-x}{(9-x)x}]=\frac{8}{3}$

Take 6 to another side,

$\frac{9}{9x-x^2}=\frac{8}{3\times 6}$

Cross multiply,

$9\times 18=8\times(9x-x^2)$

$162=72x-8x^2$

Taking 4 common and cancel out

$4x^2-36x+81=0$

Solve quadratic equation by middle term split,

$4x^2-18x-18x+81=0$

$2x(2x-9)-9(2x-9)=0$

$(2x-9)(2x-9)=0$

$\Rightarrow 2x-9=0$

$\Rightarrow x=\frac{9}{2}=4.5$

Therefore, The speed of the river's current is 4.5 km/hr.

6 0

2 years ago

Select the scenario that could be modeled by each of the given equations. For each equation, the variable c represents the cost

elena-14-01-66 [18.8K]

Answer:

c = 1.41n i think lol

Step-by-step explanation:

7 0

2 years ago

A 6-pound bag of chocolate candies costs $14.04. What is the unit price?

Ber [7]

Answer:

2.34 per pound is unit price

Step-by-step explanation:

14.04 divided by 6 is 2.34

3 0

2 years ago

Select steps that could be used to solve the equation 1 + 3x = -x + 4.

Tema [17]

For this case we have the following equation:

$1 + 3x = -x + 4$

We must solve the equation by following the steps below:

We subtract 1 from both sides of the equation:

$3x = -x + 4-1$

On the right side of the equation we have that different signs are subtracted and the sign of the major is placed:

$3x = -x + 3$

We add x to both sides of the equation:

$3x + x = 3\\4x = 3$

We divide between 4 on both sides of the equation:

$x = \frac {3} {4}$

Thus, the correct option is option B

Answer:

$x = \frac {3} {4}$

Option B

6 0

2 years ago

Read 2 more answers