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tangare [24]
3 years ago
5

Simplify. –2 • [–10.5 ÷ (2 + 3)]

Mathematics
2 answers:
attashe74 [19]3 years ago
7 0
4.2
hope this helps

good luck
Genrish500 [490]3 years ago
4 0
Ok, so for this question you need to remember PEMDAS (Parenthesis, Exponents, Multiply, Divide, Add, Subtract) So then 
-2 * (-10.5 / (2 + 3))
= -2 * (-10.5 / (5))
= -2 * ( -2.1)
= 4.2 
There you go.
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List the angles in order from largest to smallest. A) ∠R, ∠P, ∠Q B) ∠R, ∠Q, ∠P C) ∠Q, ∠P, ∠R D) ∠Q, ∠R, ∠P
mars1129 [50]

Answer: A

Step-by-step explanation:

Angles opposite shorter sides of a triangle are smaller, and angles opposite longer sides in a triangle are larger.

8 0
2 years ago
Whats is the solution for 4х + 8 = 3х + 14​
cestrela7 [59]

Answer:

4x+8=3x+14

4x-3x=14-8

x=6

7 0
3 years ago
Read 2 more answers
Solve using the substitution method.
Brilliant_brown [7]

Answer:

x = 1, y = 4

Step-by-step explanation:

This is very simple

Since you have 2 equations with the same coefficient of x, just minus one equation from another:

          x + 3y = 13

       -      

          x + 2y = 9

                1y = 4

Sub y = 4 into any of the 2 equation,

x + 3(4) = 13

x + 12 = 13

x = 13 - 12

  = 1

5 0
3 years ago
You are given the parametric equations x=2cos(θ),y=sin(2θ). (a) List all of the points (x,y) where the tangent line is horizonta
vladimir1956 [14]

Answer:

The solutions listed from the smallest to the greatest are:

x:  -\sqrt{2}   -\sqrt{2}  \sqrt{2}  \sqrt{2}

y:      -1         1     -1     1

Step-by-step explanation:

The slope of the tangent line at a point of the curve is:

m = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }

m = -\frac{\cos 2\theta}{\sin \theta}

The tangent line is horizontal when m = 0. Then:

\cos 2\theta = 0

2\theta = \cos^{-1}0

\theta = \frac{1}{2}\cdot \cos^{-1} 0

\theta = \frac{1}{2}\cdot \left(\frac{\pi}{2}+i\cdot \pi \right), for all i \in \mathbb{N}_{O}

\theta = \frac{\pi}{4} + i\cdot \frac{\pi}{2}, for all i \in \mathbb{N}_{O}

The first four solutions are:

x:   \sqrt{2}   -\sqrt{2}  -\sqrt{2}  \sqrt{2}

y:     1        -1        1     -1

The solutions listed from the smallest to the greatest are:

x:  -\sqrt{2}   -\sqrt{2}  \sqrt{2}  \sqrt{2}

y:      -1         1     -1     1

6 0
3 years ago
Which of the following pairs is not correctly written in scientific notation?
Mnenie [13.5K]
The answer is:
__________________________________________________
 [B]:  "6,500 = 6.5 ² ".
__________________________________________________________
Note:  This is the correct answer choice because this chioce is INCORRECT;

Note: "6,500 = 6.5 * 1000 = 6.6 * 10³ " ;  note that:  "6.5 * 10² = 6.5 * 100 = 650.

Take note of this very answer chioce:   "650 = 65 * 100 = 6.5² * 10²  . " ;
__________________________________________________________
8 0
4 years ago
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