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Likurg_2 [28]
3 years ago
10

Which triangles do not have an obtuse angle. Why.

Mathematics
1 answer:
katovenus [111]3 years ago
4 0

Isosceles triangle and an equilateral because all of its angles are alway going to be 90 or less than 90

Step-by-step explanation:

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Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x
Julli [10]

Answer:

a = 9

Step-by-step explanation:

First we need to add  (x^2+3x)  to (3x^2+ax),

(x^2+3x)+(3x^2+ax)

Expand

= x^2+3x+3x^2+ax

Collect the like terms

= x^2+3x^2+3x+ax

= 4x^2 + 3x + ax

= 4x^2+(3+a)x

Equate the solution to 4x^2+12x

4x^2+(3+a)x = 4x^2+12x

Comparing the like terms on both sides

(3+a)x =12x

3 + a = 12

a = 12 - 3

a = 9

Hence the value of a is 9

6 0
3 years ago
Convert: 4 quarts (dry) to liters.<br> a. 0.4406<br> b. 4.406<br> c. 44.06<br> d. 440.6
kipiarov [429]
1 dry quart=1.10 

1.10 x 4= 4.4 

Final answer: B.  
4 0
2 years ago
Which number is NOT in the solution set of x + 8 &gt; 15?<br> A)6<br> B)8<br> C)10 <br> D•12
katovenus [111]

Good evening

Answer:

A) 6

Step-by-step explanation:

Firstly, the solution set to the inequality is : x > 7

Because, x + 8 > 15 ⇌ x > 15 - 8 ⇌ x > 7

Hence

The only number that is NOT in the solution set is 6

________________________________________

:)

8 0
3 years ago
Read 2 more answers
3
Dafna11 [192]

The approximate length of rail that needs to be replaced is 7.1 ft

<h3>Length of arc</h3>

Since the pool is circular, the approximate length that needs to be replaced is an arc of length, L = Ф/360° × πD where

  • Ф = central angle of rail section = 27° and
  • D = diameter of circular pool = 30 ft

<h3>Approximate length of rail</h3>

So, substituting the values of the variables into the equation, we have

L = Ф/360° × πD

L = 27°/360° × π × 30 ft

L = 3/40 × π × 30 ft

L = 3/4 × π × 3 ft

L = 9/4 × π  ft

L = 2.25 × π  ft

L = 7.07 ft

L ≅ 7.1 ft

So, the approximate length of rail that needs to be replaced is 7.1 ft

Learn more about length of an arc here:

brainly.com/question/8402454

5 0
2 years ago
Tell whether (5, 1) is a solution of y
Arisa [49]

Answer:

1 because Because the right number will be the Y intercept an in the left number will the X interception

7 0
3 years ago
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