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photoshop1234 [79]
3 years ago
13

Marie ran 842 meters in 12 minutes. How many meters per minute did she run?

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
8 0
Marie ran about 70 meters a minute
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3(2x+1)=21 <br> Solve this multi-step equation using the distributive property
Tasya [4]
3 (2x + 1) = 21
6x + 3= 21
-3 -3
6x = 18

Divide each side by 6, and x equals 3.

3 (2(3) + 1) = 21
3 (6 + 1) = 21
18 + 3 = 21


Hope this helps! Can I please have brainliest so I can level up? Thank you!
7 0
3 years ago
Please help me
Hitman42 [59]

By using <em>algebra</em> properties and <em>trigonometric</em> formulas we find that the <em>trigonometric</em> expression \frac{1}{1 - \sin x} - \frac{1}{1 + \sin x} is equivalent to the <em>trigonometric</em> expression \frac{2\cdot \tan x}{\cos x}.

<h3>How to prove a trigonometric equivalence by algebraic and trigonometric procedures</h3>

In this question we have <em>trigonometric</em> expression whose equivalence to another expression has to be proved by using <em>algebra</em> properties and <em>trigonometric</em> formulas, including the <em>fundamental trigonometric</em> formula, that is, cos² x + sin² x = 1. Now we present in detail all steps to prove the equivalence:

\frac{1}{1 - \sin x} - \frac{1}{1 + \sin x}       Given.

\frac{1 + \sin x - 1 + \sin x}{1 - \sin^{2}x}      Subtraction between fractions with different denominator / (- 1) · a = - a.

\frac{2\cdot \sin x}{\cos^{2}x}      Definitions of addition and subtraction / Fundamental trigonometric formula (cos² x + sin² x = 1)

\frac{2\cdot \tan x}{\cos x}      Definition of tangent / Result

By using <em>algebra</em> properties and <em>trigonometric</em> formulas we conclude that the <em>trigonometric</em> expression \frac{1}{1 - \sin x} - \frac{1}{1 + \sin x} is equal to the <em>trigonometric</em> expression \frac{2\cdot \tan x}{\cos x}. Hence, the former expression is equivalent to the latter one.

To learn more on trigonometric equations: brainly.com/question/10083069

#SPJ1

4 0
2 years ago
Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?
BARSIC [14]

Answer:

14π

Step-by-step explanation:

C = 2πr

D=2r

D=14

14=2r

r=7

C=2π(7)

C=14π or 43.98

4 0
3 years ago
Please help me
iVinArrow [24]
What type of mathematics is this
8 0
3 years ago
(a) An object has a mass of 720 g and a density of 18 g/cm^3<br> volume of the object?
Setler [38]

Answer:

volume = mass / density

volume = 720 g / 18 g/cm³

volume = 40 cm³

Step-by-step explanation:

5 0
3 years ago
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