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3 years ago

24 POINTS!!!!!!!!!!!!!!!!!!

2 answers:

8 0

138 + 31 = 169
The angles are complementary. sum = 90
The angles are supplementary. sum =180

so
answer:
The angles are neither complementary nor supplementary.

4vir4ik [10]3 years ago

3 0

The answer is the angles are neither complementary nor supplementary, because complementary is to add up to 90° and supplementary is to add up to 180°, and these angles add up to 169°. I hope this helps!

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Round the mixed number to the nearest whole or half. 11 5/6

Luba_88 [7]

11 5/6 as a decimal would be 11.83. Then, rounding that to the nearest whole number would be 12. Giving you an answer of 12.

7 0

3 years ago

What is the value of 2.3+8−12? 1.) 10.8 2.) 10.3 3.) 9.8 4.) 9.5

melisa1 [442]

Answer:

Step-by-step explanation:

to answer this algebraic question use BDMAS rule

first solve bracket then division, multiplication,addition then subtraction.

6+8-12

14-12

8 0

3 years ago

Please answer correctly !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!

Snezhnost [94]

Answer:

$\boxed {\boxed {\sf 1. \ 20 }}$

Step-by-step explanation:

An equilateral triangle has 3 equal sides and angles. Remember that equilateral sounds like equal.

The interior angles of a triangle must equal 180 degrees.

All 3 angles are the same.
180/3= 60
All 3 angles in an equilateral triangle equal 60 degrees.

The question tells us the angle is equal to (4x-20).

∠= 60°
∠= (4x-20)°

So, by substitution, we can set 60 and (4x-20) equal to each other.

$60=4x-20$

Now, solve for x by isolating the variable on one side of the equation.

20 is being subtracted from 4x and the inverse operation of subtraction is addition. Add 20 to both sides of the equation.

$20+60=4x-20+20 \\ 20+60=4x\\80=4x$

x is being multiplied by 4. The inverse operation of multiplication is division. Divide both sides of the equation by 4.

$\frac{80}{4}=\frac{4x}{4}$

$\frac{80}{4}=x \\\ 20=x$

x is equal to 20 and choice 1 is correct.

3 0

3 years ago

Use mathematical induction to prove that the statement is true for every positive integer n. 8 + 16 + 24 + . . . + 8n = 4n(n + 1

mezya [45]

First show the statement holds for $n=1$ . The left hand side is just 8, and the right hand side is $4(1)(1+1)=8$ , so it's true.

Assume the statement holds for $n=k$ , i.e.

$8+16+\cdots+8(k-1)+8k=4k(k+1)$

and use this to show it holds for $n=k+1$ , i.e.

$8+16+\cdots+8(k-1)+8k+8(k+1)=4(k+1)(k+2)$

By the assumption above, you have

$\underbrace{8+16+\cdots+8(k-1)+8k}_{n=k}+8(k+1)=4k(k+1)+8(k+1)=4(k+1)(k+2)$

so the statement is true for all $n\ge1$ .

3 0

4 years ago

The rectangular bed of a truck is 1 9⁄10 meters long, 1 1⁄2 meters wide, and 1⁄2 meter tall. What is the volume of the truck's b

SpyIntel [72]

Answer:

1 17/40 m^3

Step-by-step explanation:

Volume = l*w*h

= 1 9/10 * 1 1/2 * 1/2

Changing the mixed numbers to improper fractions

1 9/10 = (10*1+9) /10 = 19/10

1 1/2 = (2*1+1)/2 = 3/2

1/2 = 1/2

V = 19/10* 3/2*1/2

=57/40

Changing this back to a mixed number

40/40 + 17/40

1 17/40

5 0

3 years ago

Read 2 more answers