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alexandr402 [8]
2 years ago
13

Help pls im being timed i cant do mathhh

Mathematics
1 answer:
postnew [5]2 years ago
8 0
I think the answer is 4.21
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Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
DaniilM [7]
A ) h = -16 t² + 135 t + 76
Let : h = 0
0 = - 16 t² + 135 t + 76
B ) t 1/2 = (-b+/- √ ( b² - 4 ac ) / ( 2 a )
t 1/2 = (-135 - √(18,225 + 4,864))/ (-32) = ( - 135 - 151.95) / (- 32)=
= (-286.95) / (- 32) = 9.967 ≈ 9.0 s ( other solution is negative )
Answer:
2)  0 = -16 t² + 135 t + 76;  9 s 

7 0
4 years ago
Read 2 more answers
What is the value of 9 in 0.9? :))
Leya [2.2K]

Answer:

The value is 9 tenths :)

Step-by-step explanation:

6 0
3 years ago
SOS if anyone could help that would be appreciated!!!❤️
Anastaziya [24]

Answer:

See below

Step-by-step explanation:

2e)15-4x=10x+45

Solve:

15-4x=10x+45\\-4x-10x=45-15\\-14x=30\\ \boxed {x=-\dfrac{15}{7}}3(x+1)=21

Check:

15-4 \left(-\dfrac{15}{7} \right)=10\left(-\dfrac{15}{7} \right)+45

15+\dfrac{60}{7} \right)=-\dfrac{150}{7} +45

\dfrac{210}{7}  =30

30=30

3a) 3(x+1)=21

Solve:

3(x+1)=21\\3x+3=21\\3x=18\\x=6

3b) 2+3(x+1)=6x

2+3x+3=6x\\5=3x\\

x=\dfrac{5}{3}

3c) -2(2x-3)=-2

Solve:

-2(2x-3)=-2\\-4x+6=-2\\-4x=-8\\x=2

3 0
3 years ago
MARKING BRAINLIEST!!!!<br> find each product -7/9 x 3/5<br><br> -27/45<br> -7/15<br> 7/15<br> 27/45
Leno4ka [110]

Answer:

1.  .466-

2.  -0.6

3.  .466-

4.   .466-

5.  0.6

Step-by-step explanation:

3 0
3 years ago
Which graph represents a function?
Marrrta [24]

The one in the top left corner is the answer

6 0
3 years ago
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