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Levart [38]
3 years ago
12

BRAINLIEST

Mathematics
2 answers:
Slav-nsk [51]3 years ago
6 0

Answer:

309

Step-by-step explanation:

Leona [35]3 years ago
3 0

Answer:

309

Step-by-step explanation:

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Uhh hiii... i won't be back uhh coz I'm really sad, I'm really tired.... and i....i need a hug... I'm not taking ur attention i
jarptica [38.1K]

Answer:

*hugs* i got you

Step-by-step explanation:

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3 0
2 years ago
The sum of the measures of the angles of a triangle is 180. The sum of the measures of the second and third angles is five times
erastova [34]

Answer:

first angle be 30°

second angle be 70°

third angle be 80°

Step-by-step explanation:

first angle be x

second angle be y

third angle be z

x+y+z=180

given, y+z = 5x; z=5x-y

also, z=y+10

5x-y = y+10

5x= 10+y+y = 10+2y

x= (10+2y)/5

x+y+z=180

(10+2y)/5 + y + y+10 = 180

(10+2y)/5 = 180 -2y -10

(10+2y)/5 = 170-2y

multiply both sides by 5

10+2y = 5(170-2y)

10+2y= 850-10y

2y+10y = 850-10

12y= 840

y= 840/12 = 70°

z=y+10 =70+10= 80°

5x= (10+2y) = 10+2(70) = 10+140= 150

x = 150/5 = 30°

6 0
3 years ago
Square root! Please explain!
Anon25 [30]

Answer:

a number which produces a specified quantity when multiplied by itself.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
D(5, 7), E(4, 3), and F(8, 2) form the vertices of a triangle. What is<br> m∠DEF?
lakkis [162]
DE^2 = 1 + 16 = 17. 
<span>EF^2 = 16 + 1 = 17. </span>
<span>DF^2 = 9 + 25 = 34. </span>
<span>Since (DE)^2 + (EF)^2 = (DF)^2, 
</span><span> angle E is 90 degrees.
</span><span> DF must be the hypotenuse 
</span>see attachment below

3 0
2 years ago
Read 2 more answers
the sum of the first three terms of a sequence Is 42 The fourth term is 24. find u1 and the common difference
e-lub [12.9K]

10=2d

Given:

The sum of the first three terms of a sequence Is 42.

The fourth term is 24.

To find:

The  u₁ and the common difference

Step-by-step explanation:

nth term of a sequence is

u_n=u_1+(n-1)d

where, u₁ is first term and d is common difference.

4th term is 24.

u_4=u_1+(4-1)d

24=u_1+3d           ...(i)

Sum of nth term of an AP is

S_n=\dfrac{n}{2}[2u_1+(n-1)d]

Sum of first three terms is 42.

S_3=\dfrac{3}{2}[2u_1+(3-1)d]

42=\dfrac{3}{2}[2u_1+2d]

Divide both sides by 3.

14=u_1+d          ...(ii)

On subtract (ii) from (i), we get

10=2d

5=d

Put d=5 in equation (ii).

14=u_1+5

14-5=u_1

9=u_1

Therefore, the first term is u_1=9 and common difference is d=5 .

6 0
3 years ago
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