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dangina [55]
3 years ago
7

Solve the quadratic equation. (x + 6)2 = 49

Mathematics
1 answer:
kykrilka [37]3 years ago
3 0

Answer:

C

Step-by-step explanation:

To solve, use inverse operations:

(x+6)^2=49\\\sqrt{(x+6)^2} =\sqrt{49} \\x+6=+/-7

Now we solve for both +/- 7.

x+6=7

x=1

x+6=-7

x=-13

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According to a published study, 13% of men has been involved in a minor traffic accident. Suppose we have randomly and independe
Lemur [1.5K]

Answer: There are 52 men we can expect to have been involved in a minor traffic accident.

Step-by-step explanation:

Since we have given that

Percentage of men has been involved in a minor traffic accident = 13%

Number of men surveyed = 400

So, Number of sample men we can expect to have been involved in a minor traffic accident is given by

\dfrac{13}{100}\times 400\\\\=0.13\times 400\\\\=52

Hence, there are 52 men we can expect to have been involved in a minor traffic accident.

4 0
4 years ago
Tell whether the angles are complementary or supplementary. Then find the value of $x$ . A ray intersects two other rays forming
Mariulka [41]

Answer:

The angles are complementary

x is 55 degrees

Step-by-step explanation:

Complementary angles are angles that sums up to 90 degrees

Since a ray intersects two other rays forming a right angle, hence the sum of the two angles is 90degrees and this shows that the angles are complementary.

Given the two angles to be x and (x-20). Taking their sum and equating it to 90 degrees, we will have;

x + x - 20  = 90

2x - 20 = 90

2x = 90+20

2x = 110

x = 110/2

x = 55 degrees

Hence the value of x is 55degrees

8 0
3 years ago
The answer for this 7+7+(1)=<br> 13
Ludmilka [50]

Answer:

you answered it yourself, it's 13

Step-by-step explanation:

7 = 7

7 + 7 = 14

14 - 1 = 13

6 0
3 years ago
Read 2 more answers
A spherical balloon has a circumference of 25 cm.
worty [1.4K]

The approximate surface area of the balloon is 199 cm².

The approximate volume of the balloon is 262 cm³

<h3>What is the surface area and the volume of the balloon? </h3>

Radius of the balloon = circumference / 6.2832

25 / 6.2832 = 3.98cm

Surface area = 4πr²

4 x 22/7 x 3.97² = 199 cm²

Volume =  4/3πr³

4/3 x 22/7 x 3.97³ = 262.20 cm³

To learn more about the volume of a sphere, please check: brainly.com/question/13705125

5 0
3 years ago
The value of y varies directly with x. If x = 5 when y = 12, what is the value of x when y = 30?
sergiy2304 [10]

Answer:

12

Step-by-step explanation:

12/5 = 2.4

2.4(x)

if x = 5 then,

2.4(5) = 12

5 0
3 years ago
Read 2 more answers
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