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Basile [38]
3 years ago
11

If 21 is added to a number the result is 40 less than twice the number what is the number?

Mathematics
1 answer:
Karolina [17]3 years ago
7 0
If 21 is added to (+ 21) a number (x) the result (=) is 40 less than (- 40) twice the number (2x)

x + 21 = 2x - 40   Add 40 to both sides
x + 61 = 2x           Subtract x from both sides
      61 = x             Switch the sides to make it easier to read
       x = 61


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3a <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3a%20%2B%20a%20%7B%7D%5E%7B2%7D%20%7D%7Ba%7D%20" id="TexFormula1" title="
egoroff_w [7]

Answer:

(3+a)

Step-by-step explanation:

3a + a^2

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a

Factor out an a in the numerator

a(3+a)

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Cancel like terms

(3+a)

6 0
2 years ago
Read 2 more answers
Which of the binomials below is a factor of this trinomial?
Elina [12.6K]
STEP-BY-STEP SOLUTION:

= x^2 - 13x + 30

= x^2 - 10x - 3x + 30

= x ( x - 10 ) - 3 ( x - 10 )

= ( x - 10 ) ( x - 3 )

FINAL ANSWER:

Therefore, the answer is:

C. x - 10

Please mark as brainliest if you found this helpful! :)
Thank you and have a lovely day! <3
6 0
3 years ago
Read 2 more answers
Find the quotient if the sum of 3/5 and 7/10 is divided by the difference between 7/12 and 3/10
Serggg [28]

3/5 + 7/10 / 7/12 - 3/10

13/10 / (35/60 - 18/60=)17/60

10/13 x 60/17 = 78/17 = 4 10/17

8 0
3 years ago
The diameter of the wheels on your car is 25 inches. You are going to drive 458 miles today. Each of your wheels is going to tur
Kipish [7]

d = Diameter of wheels = 25 inches

s = Distance to be traveled by the wheels = 458 miles

Converting the miles to inches

s=458\times 5280\times 12=29018880\ \text{inches}

The distance traveled by the wheels in rotation is the circumference

D=\pi d\\\Rightarrow D=\pi\times 25

The number of rotations required to cover the distance would be

\dfrac{s}{D}\\ =\dfrac{29018880}{\pi\times 25}\\ =369479.855599

1 rotation is 360^{\circ} so

369479.855599\times 360=133012748.016^{\circ}

The number of rotations to cover the required distance is 133012748.016^{\circ}

Learn more:

brainly.com/question/23298088

brainly.com/question/1066067

4 0
3 years ago
Regular price. discount
Alekssandra [29.7K]

Answer:

$3.60

Step-by-step explanation:

This is because 10% of 4 results in this answer.

Feel free to give brainliest.

6 0
3 years ago
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