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liq [111]
2 years ago
9

Evaluate the following expression. [4 + (12 - 2) ÷ 5] ÷ 7

Mathematics
2 answers:
Anika [276]2 years ago
7 0

Answer:

[4 + (12 - 2) ÷ 5] ÷ 7

[4 + 6 / 5] / 7

[10 / 5] / 7

2 / 7

= 2/7 or 0.28571428571

Murljashka [212]2 years ago
5 0
0.85714285714 or 2/7
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The following proof shows an equivalent system of equations created from another system of equations. Fill in the missing reason
Nookie1986 [14]

Answer:

<h2>A.Multiplication Property of Equality</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}2x+2y=14\\-x+y=5&\text{\underline{multiply both sides by 2}}\end{array}\right\\\\\boxed{\underline{+\left\{\begin{array}{ccc}2x+2y=14\\-2x+2y=10\end{array}\right}}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=24\qquad\text{divide both sides by 4}\\.\qquad\qquad y=6\\\\\text{put the value of y to the second equation:}\\\\-x+6=5\qquad\text{subtract 6 from both sides}\\-x=-1\qquad\text{change the signs}\\x=1

8 0
3 years ago
Read 2 more answers
If tan0=3/4 find sin0
krok68 [10]

Answer:

H2=02+A2

H2=9+16

=25

Step-by-step explanation:

sino =0/H

3/5

5 0
3 years ago
I need help! This is Geometry lesson 8-3 ! Please help me asap!!!!
gulaghasi [49]
If you learned about the 45-45-90 triangle (which is isosceles), then the faster way is to know that the hypotenuse (side opposite of right angle) is √2 times either one of the sides.
3√2 = (√2)x
x = 3

But if you didn't learn the 45-45-90 triangle yet, that's ok.
Recall the trigonometric ratios for right triangles: sine (sin), cosine (cos), tangent (tan).

If your angle is x, then
sin(x) = opposite side / hypotenuse
cos(x) = adjacent side / hypotenuse
tan(x) = opposite side / adjacent side

Remember the hypotenuse is the side opposite and across from the right angle (3√2 in this case).
An acronym to remember this is SohCahToa.

In this problem, the angle given is 45°, and you need to find the length of the adjacent side x. The hypotenuse is also given as 3√2.

Because we have the adjacent side and the hypotenuse, we use cosine to relate those two sides
cos(45°) = x / (3√2)
x = (3√2)cos45°
If you plug this into your calculator (in degree mode), then
x = 3

8 0
3 years ago
Simplify these 12 radicals:
Alexandra [31]
1)
4 \sqrt{5}
2)
8
3)
3 \sqrt{5}
4)
3 \sqrt{6}
5)
4 \sqrt{2}
6)
6
7)
5 \sqrt{6}

8)
2 \sqrt{5}
9)
6 \sqrt{5}
10)
6 \sqrt{2}
11)
2 \sqrt{2}
12)
5 \sqrt{2}
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3 years ago
How to find the perimeter and area
Ad libitum [116K]
For Perimeter you add all the sides of the figure and the total is your perimeter. For Area you multiply the length times the width.
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