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Leni [432]
3 years ago
11

Solve for a. 7a-2b = 5a+b

Mathematics
2 answers:
Stels [109]3 years ago
6 0
<span>So we have a problem with two unknows and one equation. We have to express one over the other like this: 7a - 2b = 5a + b. First we separate one kind on the left side and the other kind on the right side: 7a - 5a = b + 2b. Then: 2a = 3b. Now we divide both sides by 2 and get: a= 3b/2.</span>
Bad White [126]3 years ago
6 0

Answer:

a=3b/2

Step-by-step explanation:

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Each vertical cross-section of the triangular prism shown below is an isosceles triangle.
Fantom [35]

Answer:

<h3>x = 3 units</h3><h3></h3>

Step-by-step explanation:

use Pythagorean theorem:

a² + b² = c²

where a = h

           b = 8/2  = 4

           c = 5

<u>plugin values into the formula:</u>

h² + 4² = 5²

h² = 5² - 4²

x = √9

x = 3

7 0
2 years ago
Help me plss llol.....
zvonat [6]
10x+18 is your answer
7 0
2 years ago
Given the center and radius of a circle, write the equation of the circle.
Mashutka [201]

Answer:

(x + 2)² + (y - 1)² = 25

General Formulas and Concepts:

<u>Algebra I</u>

  • Coordinates (x, y)

<u>Pre-Calc</u>

Circle Center Formula: (x - h)² + (y - k)² = r²

  • <em>(h, k)</em> is center
  • <em>r</em> is radius

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

<em>(h, k)</em> = (-2, 1)

<em>r</em> = 5

<u>Step 2: Find Equation</u>

  1. Substitute in variables [Circle Center Formula]:                                             (x - -2)² + (y - 1)² = 5²
  2. Simplify:                                                                                                             (x + 2)² + (y - 1)² = 25

Topic: Pre-Calculus

Unit: Conics

Book: Pre-Calculus (McGraw Hill)

5 0
3 years ago
The first gardener can finish the job in 6 hours, and the second gardener can do the same job in 7 hours. How long it will take
marissa [1.9K]

If the first gardener can finish the job in 6 hours, it means that every hour he completes 1/6 of the job.

By the same logic, the second gardener completes 1/7 of the job per hour.

So, if they work together, they complete

\dfrac{1}{6}+\dfrac{1}{7}=\dfrac{7+6}{42}=\dfrac{13}{42}

of the job per hour.

So, after 42/13 of a hour, they'll complete the job. Since one hour is made of 60 minutes, 42/13 of a hour is

\dfrac{42}{13}\cdot 60 \approx 194

So, it will take them about 194 minutes to finish the job, i.e. about 3 hours and 14 minutes.

8 0
3 years ago
Complete the statement.<br><br><br><br><br>Since angle B is the largest angle, is the side.
postnew [5]

Answer:

<em>∠B is the largest interior angle of the triangle, and AC is the</em><em> largest</em><em> side.</em>

Step-by-step explanation:

Relationship of sides to interior angles in a triangle-

  1. The shortest side of a triangle is always opposite to the smallest interior angle.
  2. The longest side of a triangle is always opposite to the largest interior angle.

So converse of the second property is the side opposite to the largest interior angle is always the largest side.

As ∠B is the largest interior angle of the triangle, so its opposite side which is AC will be the largest side.

7 0
3 years ago
Read 2 more answers
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