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3 years ago

Help me solve 4x - 3 < 7

Mathematics

2 answers:

yawa3891 [41]3 years ago

7 0

Answer:

Step-by-step explanation:

$4x - 3 < 7$

Add 3 to both sides of the equation

$4x - 3 + 3 < 7 + 3 \\ 4x < 7 + 3 \\ 4x < 10$

Divide both sides of the equation by 4

$\frac{4x}{4} < \frac{10}{4}$

Simplify

$x < \frac{5}{2}$

nexus9112 [7]3 years ago

4 0

I’m pretty sure The answer is x < 2.5 you try to get the x by itself so you’ll add 3 on both sides then divide 4 on both sides

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Aubrey went shopping at her favorite store target she bought three shirts and a pair of jeans that cost $28 she spent a total of

aliya0001 [1]

Answer:

Each shirt cost $20

Step-by-step explanation:

88- $28= 60

60/3= $20

8 0

2 years ago

Find the least squares regression equation using the school year (in number of years after 2000) for the input variable and the

Ad libitum [116K]

<u>Answer-</u>

<em>The least squares regression equation using the school year (in number of years after 2000) for the input variable and the average cost (in thousands of dollars) for the output variable is "y=0.937x+12.765" .</em>

<u>Solution-</u>

The independent variable / input variable= x = Number of years after 2000 ( = year-2000)

The dependent variable / output variable = y = Average cost in thousands of dollars

(The table has been attached herewith.)

To find the regression equation for a group of (x,y) points,

We have to calculate the slope and y-intercept, then we can put those values in the equation y = mx + c ( Slope - Intercept formula)

We know that,

$Slope=m=\frac{N\sum xy -\sum x\sum y}{N\sum x^{2}- (\sum x)^{2}}$

Putting the values from the table,

$m=\frac{(8 \times 1020.206)-(52 \times 150.894)}{(8 \times 3810)-(52^2)}$

( ∵ Instead of 150,894 we have to put 150.894 as we have find the line for year and thousands of dollars )

$\Rightarrow m =\frac{8161.648-7846.488}{3040-2704} =\frac{315.16}{336}=0.937$

Now, for the y-intercept,

$c =\frac{\sum y -m(\sum x)}{N}$

Putting the values,

$c=\frac{150.894-(52 \times 0.937)}{8}=\frac{102.125}{8}=12.765$

Now, putting the values of c and m, in the Slope-Intercept formula,

$y=0.937x+12.765$

3 0

3 years ago

Evaluate, 2x-6 if x=.5

kkurt [141]

Answer:

-5

Step-by-step explanation:

2x-6

2(.5)-6

1-6

-5

6 0

3 years ago

What is (2/3)^4 <br> does anybody know?

Sveta_85 [38]

Answer:

Step-by-step explanation:

<h2>hopes this helps. Mark as brainlest plz!</h2>

4 0

2 years ago

Help peeps i shall give brainalist .-_-.

Oksana_A [137]

The answer is B
R=89.49/2 pi
It give you the circumference and you need to find the radius

5 0

2 years ago