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2 years ago

11

Plz help me asap wil give brainliest

1 answer:

Brums [2.3K]2 years ago

5 0

Answer:

A: a>-21 1/3

Step-by-step explanation:

You solve this just like an equation. do -16 divided by 3/4, to get -21 1/3, and since you didnt divide by a negative number, you keep the sign the same.

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What does a 23/100 reduced to?

natima [27]

Answer:

the answers is nothing because 23 is only divisible by its self

Step-by-step explanation:

4 0

2 years ago

Calculate the arithmetic sequence in which a9=17 and the common difference is d=-2.1

jek_recluse [69]

Answer:

$S_{31}=71.3$

Step-by-step explanation:

The nth term of an arithmetic sequence is given by the formula,

$U_n=a_1+(n-1)d$

We were given that the 9th term is $17$ .

$\Rightarrow 17=a_1+(9-1)(-2.1)$

$\Rightarrow 17=a_1+(8)\times(-2.1)$

$\Rightarrow 17=a_1-\frac{84}{5}$

$\Rightarrow 17+\frac{84}{5}=a_1$

$\Rightarrow a_1=\frac{169}{5}$

The sum of the first n-terms is given by the formula,

$S_n=\frac{n}{2}(2a_1+(n-1)d)$

To find $S_{31}$ , we substitute $n=31$ , $a_1=\frac{169}{5}$ and $d=-2.1$ .

$\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(31-1)(-2.1))$

$\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(30)(-2.1))$

$\Rightarrow S_{31}=\frac{31}{2}(\frac{23}{5})$

$\Rightarrow S_{31}=\frac{713}{10}$

$\Rightarrow S_{31}=71.3$

The correct answer is D

8 0

3 years ago

Read 2 more answers

Easy math i'll mark brainliest

german

Answer:

Q6: B Q7: D Q8: C Q9: D Q10: A

7 0

2 years ago

Read 2 more answers

Write the equation of the line parallel to y=8x-1 that contains the point (-6,2)

Tasya [4]

Equation: y = 8x - 1
Compare it with, y = mx + b
Slope, m = 8
Now, parallel line must have equal slope, = 8

We know, y - y1 = m(x - x1)
y - 2 = 8(x + 6)

Hope this helps!

6 0

2 years ago

Find the slope of each line 2-3. please help thank you.

atroni [7]

2)
(-3, 3) (2,0)
slope = (3-0)/(-3-2) = -3/5

3)
y = 3
so slope = 0

7 0

2 years ago