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3 years ago

Need help 8th grade math

Mathematics

2 answers:

SIZIF [17.4K]3 years ago

7 0

Answer:

60°

Step-by-step explanation:

outside angle = two opposite inside angles

10x - 45° = 4x + 3x

3x = 45°

x = 15°

m∠B = 4x

m∠B = 4(15°)

m∠B = 60°

garik1379 [7]3 years ago

5 0

The answer is 60 measures

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Which represents the solution set to the inequality -1.5(4x + 1) > 4.5 -2.5(x + 1)?

laila [671]

<h2>The solution set to inequality is:</h2>

$\boxed{-1.5\left(4x+1\right)>4.5-2.5\left(x+1\right)\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x$

Solution:

Given inequality is:

$-1.5(4x + 1) > 4.5 -2.5(x + 1)$

We have to find the solution set to inequality

From given,

$-1.5(4x + 1) > 4.5 -2.5(x + 1)\\\\\mathrm{Multiply\:both\:sides\:by\:}10\\\\-1.5\left(4x+1\right)\cdot \:10>4.5\cdot \:10-2.5\left(x+1\right)\cdot \:10\\\\-15\left(4x+1\right)>45-25\left(x+1\right)$

Expand

$-60x -15 > 45 -25x - 25\\\\Simplify\\\\-60x-15>-25x +20$

$\mathrm{Add\:}15\mathrm{\:to\:both\:sides}\\\\-60x-15+15>-25x+20+15\\\\Simplify\\\\-60x>-25x+35\\\\\mathrm{Add\:}25x\mathrm{\:to\:both\:sides}\\\\-60x+25x>-25x+35+25x\\\\Simplify\\\\-35x>35\\\\\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}\\\\\left(-35x\right)\left(-1\right)$

Thus the solution set is:

$-1.5\left(4x+1\right)>4.5-2.5\left(x+1\right)\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x$

4 0

3 years ago

Read 2 more answers

Evaluate ab – 0.5b when a = 1 and b = 5

arsen [322]

15 - 0.5 x 5 = 12.5

3 0

3 years ago

M m find the value of x

Lorico [155]

If A and J are complementary angles, that means that when they are added together, they equal 90 degrees. We can set up the equation 5x+30+4x+15=90.

5x+30+4x+15=90
9x+45=90
9x=45
x=5

:)

3 0

4 years ago

Pls somebody help me wth this

valentina_108 [34]

Answer:

8 puzzles, and 840 pieces

Step-by-step explanation:

420 / 4 = 105

630 / 6 = 105

Option 2 is the correct answer,

Reason

840 / 8 = 105