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igomit [66]
4 years ago
11

What is the approximate length of the diagonal of a square with side length of 20 centimeters

Mathematics
2 answers:
zhuklara [117]4 years ago
5 0
Answer:28.28 cm

Explanation:

a² + b² = c²

20² + 20² = c²

c² = 400 + 400

c² = 800

c = √800

c = 28.28 cm
Jet001 [13]4 years ago
4 0
You can either use the Pythagorean theorem or the formula d = a√2.

Pythagorean theorem:

The diagonal is the hypotenuse of the right triangle in the square and the two sides are the legs.

20² + 20² = d²
400 + 400 = d²
800 = d²
√800 = d
28.28 = d

Using the formula:

d = a√2
d = 20√2
d = 28.28

The answer with both the methods is the same.

Hope this helps :)

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In one season, Moses made 4 times as many goals as Kyle. Together, they made 15 goals. How many goals did Moses make and how man
Likurg_2 [28]
4x+x= 15 5x=15 x=3 Moses made 12 goals and Kyle made 3
4 0
4 years ago
WILL MAKE BRAINLIEST !!!!! The equation y = 35.25x + 40 gives the labor cost y of repairing a car if takes x hours to repair the
seraphim [82]
Y = $35.25(6) + 40

y = $211.5 + $40= $251.50

the answer is a
5 0
4 years ago
Solve the system of equations by subsitution.<br> b = 4a +2<br> 12a - 3b = -6
Vladimir [108]

Answer:

infinite solution

Step-by-step explanation:

hello

we substitute b = 4a + 2 in the second expression

12a -3*(4a+2) = -6

<=> 12a -12a -6 = -6

<=> -6 = -6

which is always true

so there is infinite solution

hope this helps

5 0
3 years ago
suppose A and B are complementary angles, m a =(3x+5) and m b= (2x-15). Solve for x and then find m a and m b
vlada-n [284]
2 angles are complementary if the sum of their measures is 90°.

For example  if m(P) = 41°  and m(Q)=49°, then P and Q are complementary.


Thus A and B are complementary means that m(A)=m(B)=90°:

(3x+5°) + (2x-15°) =90°

5x-10°=90°

5x=100°

x=20°



Thus 

m(A)=3x+5°=3* 20°+5°=60°+5°=65°

m(B)=2x-15°=2*20°-15°=40°-15°=25°
8 0
3 years ago
1. A limited-edition soccer ball costs $30, and the<br> sales tax is 6%. What is the total cost?
ra1l [238]

Answer:

$31.80

Step-by-step explanation:

The ball will cost 100% of its price plus 6% of its price for a total of 106%.

To use percentages as a factor and multiply, they must be divide by 100, making the multiplication factor version of 106% 1.06.

Multiply the cost of the ball by your multiplication factor:

30 x 1.06 = 31.8

Money is written to two decimal places, making your answer $31.80

6 0
3 years ago
Read 2 more answers
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