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3 years ago

7

What's the value of a 2(a - 0.5a) + 3 = 4a - 1 + 5 -3a

1 answer:

pochemuha3 years ago

4 0

Answer: There are no solutions.

Step-by-step explanation:

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PLEASE HELP QUICKLY!!!<br> How are average IQs related to normal distribution

katen-ka-za [31]

Answer:

Read Explanation

Step-by-step explanation:

A standard devation of 15 means 68% of the norm group has scored between 85 (100 – 15) and 115 (100 + 15). In other words, 68% of the norm group has a score within one standard deviation of the average (100). Also, 95% of the norm group has an IQ score within two standard deviations of the average.

6 0

3 years ago

Emily has $3.15 worth of dimes and quarters. She has twice as many dimes as quarters. Determine the number of dimes and the numb

Cerrena [4.2K]

Answer:

The number of dimes is <u>14</u> and the number of quarters is <u>7</u>.

Step-by-step explanation:

Given:

Emily has $3.15 worth of dimes and quarters.

<em><u>She has twice as many dimes as quarters.</u></em>

Now, to determine the number of dimes and the number of quarters.

Let the number of quarters be $x.$

And the number of dimes be $2x.$

So, the total worth of dimes and quarters = $3.15.

Now, to get the number of dimes and quarters:

According to question:

$0.10(2x)+0.25x=3.15$

$0.20x+0.25x=3.15$

$0.45x=3.15$

<em>Dividing both sides by 0.45 we get:</em>

$x=7.$

<em>Thus, the number of quarters</em> = 7.

<em>So, the number of dimes</em> = $2x=2\times 7=14.$

Therefore, the number of dimes is 14 and the number of quarters is 7.

6 0

3 years ago

What is the slope of the line?

12345 [234]

You can find the slope using the following formula:

$\begin{gathered} m=\frac{y2-y1}{x2-x1} \\ where\colon \\ (x1,y1)=(0,2) \\ (x2,y2)=(1,0) \\ m=\frac{0-2}{1-0}=\frac{-2}{1}=-2 \end{gathered}$

8 0

1 year ago

Find the value of the length <br> x<br> rounded to 1 DP.

bagirrra123 [75]

Length of x is 98.2 m

<u>Step-by-step explanation:</u>

Step 1:

Use the trigonometric ratio tan 27° to find the common side of both the right angled triangles.

tan 27° = opposite side/adjacent side = opposite side/9

∴ Opposite side = 9 tan 27° = 9 × - 3.27 = -29.46 m

Step 2:

Use this side and trigonometric ratio cosine to find the value of x.

cos 49° = adjacent side/x = -29.46/x

∴ x = -29.46/cos 49° = -29.46/0.30

= 98.2 m (negative value neglected)

5 0

3 years ago

Read 2 more answers

Need help will mark brainliest

Black_prince [1.1K]

Answer:

64

Step-by-step explanation:

180-52/2=128/2=64

5 0

3 years ago

Read 2 more answers