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3 years ago

Help I really need the answer to this.

Mathematics

2 answers:

JulijaS [17]3 years ago

8 0

It’s either b or c

It either of those.

Anna35 [415]3 years ago

4 0

Answer:

Step-by-step explanation:

The sides are congruent so you can write the equation (4x+9)=21.

Now you subtract 9 from 21 and you get 4x=12.

All you gotta do now is divide and you get x=3.

Hope this helps!:)

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I need help urgently! Will mark the brainliest

agasfer [191]

Answer: 100

Step-by-step explanation:

4(5)^5

4 x 5^5

4 x 25

100

6 0

3 years ago

( PICTURE PROVIDED)

12345 [234]

Answer:

2x + 2x+2 = 3x + 1

4x + 2 = 3x + 1

Subtract 3x from both sides

4x - 3x + 2 = 3x - 3x + 1

x + 2 = 1

Subtract 2 from both sides

x + 2 - 2 = 1 - 2

x = -1

Hope this helped!!!

~Shane

6 0

3 years ago

Simplify (5^3)^6 leaving your answer in index form.

Ket [755]

Answer:

5^18.

Step-by-step explanation:

By the law of indices:

(a^b)^c = a^(bc)

So (5^3)^6

= 5^(3*6)

= 5^18.

4 0

3 years ago

Find the population standard deviation (σ not S) for the data set: {75,80,90,95,75,85,55,80,90,95}

Marianna [84]

The steps to work out standard deviation is as follows

Step 1: Find the mean of the data

$\frac{75+80+90+95+75+85+55+80+90+95}{10}=82$

Step 2: Subtract the mean from each data value

$75-82=-7$
$80-82=-2$
$90-82=7$
$95-82=13$
$75-82=-7$
$85-82=3$
$55-82=-27$
$80-82=-2$
$90-82=8$
$95-82=13$

Step 3: Add up the answers from step 2 $\sqrt{2.9}=1.7$

$-2+(-2)+7+13+(-7)+3+(-2)+(-2)+8+13=29$

Step 4: Divide the answer is step 3 by the number of data

$\frac{29}{10}=2.9$

Step 5: Square root the answer in step 4

$\sqrt{2.9} =1.7$

5 0

4 years ago

The first term of an arithmetic sequence is -30 and the common difference is 8. Find the 20th term.

Sedaia [141]

Answer:

122.

Step-by-step explanation:

nthe term = a1 + d(n - 1) so here:

20th term = -30 + 8(20 - 1)

- 30 + 152

= 122.

4 0

3 years ago

Help I really need the answer to this.​

Help I really need the answer to this.