Marlene is trying to estimate v 42. She uses this table of values:

Mathematics

1 answer:

ikadub [295]2 years ago

3 0

Answer:

Step-by-step explanation:

6.52^2 = 42.3 according to the table so 6.5 should be a good estimate.

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Alex Ar [27]

Answer:

ADB and ABC are similar

x = 8

Step-by-step explanation:

hypotenuse in ADB = $\sqrt{4^2 + 2^2 } = \sqrt{20}$

since two triangles are similar,

$\frac{2+x}{\sqrt{20} } = \frac{\sqrt{20}}{2}$

solving for x, x=8

4 0

3 years ago

Will mark brainliest!!

wlad13 [49]

Solve the system

9x = 27-9y
20x=71-9y

Let's use the "elimination through addition/subtraction method.
Multiply the first equation by -1 so as to obtain +9y:

-9x = -27 + 9y
20x= 71- 9y
--------------------

Add these 2 equations together:

-9x = -27 + 9y
20x= 71- 9y
--------------------
 11x = 44

Solve this for x: x = 44/11 = 4.

Now find y by subst. 4 for x in either of the original equations.

Using the second equation: 

20x=71-9y
20(4) = 71 - 9y
80-71 = -9y
9 = -9y. Then y = -1.

The solution set is (4,-1).

7 0

3 years ago

The length of one leg of a right triangle is 8 centimeters shorter than the

ra1l [238]

${34}^{2} + {b}^{2} = {42}^{2} \\ 1156 + {b}^{2} = 1764 \\ 1156 - 1156 + {b}^{2} = 1764 - 1156 \\ {b}^{2} = 608 \\ \sqrt{ {b}^{2} } = \sqrt{608} \\ b = 24.7$
I used the Pythagorean formula, which is a² + b² = c².
a² and b² are the two side legs while c² is the hypotenuse.
One of the side is 42 - 8 = 34 cm.

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3 years ago

Your neighbor burns 100 Calories in 10 minutes cross-country skiing. There is a proportional relationship between Calories burn

Zinaida [17]

Answer:

Step-by-step explanation:

For every one minute 10 calories are being burned

4 0

3 years ago

set the equation up for "Eight less than the square of a number is the same as adding the number and four"

TEA [102]

X^2-8 = x+4 is your answer!

5 0

3 years ago