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3 years ago

X+7=4 Algebraic equation

Mathematics

2 answers:

Vaselesa [24]3 years ago

5 0

The answer is x=

-3

Hope I helped!

DiKsa [7]3 years ago

4 0

X+7=4
-7 -7
x=-3

subtract the access numbers from the side with the variable, do to BOTH sides

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Write an equation of the form y = mx for the line shown below. If appropriate,

9966 [12]

Answer:

y = - 0.5x

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (- 4, 2) and (x₂, y₂ ) = (2, - 1) ← 2 points on the line

m = $\frac{-1-2}{2-(-4)}$ = $\frac{-3}{2+4}$ = $\frac{-3}{6}$ = - 0.5

The line crosses the y- axis at (0, 0 ) ⇒ c = 0

y = - 0.5x + 0 . that is

y = - 0.5x

6 0

3 years ago

A TV report conducted a survey of 947 people in New York City and found that 35% of the population believe that the Yankees will

garik1379 [7]

Answer:

$35\%$ represents the sample proportion of the population

Step-by-step explanation:

From the question we are told that

The sample size is n = 947

The proportion of the population that believes that the Yankees will miss the playoffs this year is $k = 35\% = 0.35$

From the question we are told the confidence level is 97%

The lower limit of the confidence level is a = 28%

The upper limit of the b = 42%

Generally the sample proportion of this population is mathematically represented as

$\^ p = \frac{a+ b}{2}$

=> $\^ p = \frac{28 + 42 }{2}$

=> $\^ p = 35\%$

Hence $35\%$ represents the sample proportion

8 0

3 years ago

cos2x=____. Check all that apply. A. 1-2sin^2 x. B. 2sin^2 x-1. C. sin^2 x-cos^2 x. D. cos^2 x-sin^2 x

g100num [7]

cos 2 x = cos² x - sin² x = 1 - sin² x - sin² x = 1 - 2 sin² x.
Answer: A ) 1 - sin² x and D ) cos² x - sin² x
Thank you.

7 0

3 years ago

Read 2 more answers

What is the probability of a coin landing on

VMariaS [17]

1 /3

On a coin, the probability of heads:

P ( H ) = 1 2/2

ON a die, the probability of getting a number less than 4:

P ( 1 , 2 , 3, 4 ) = 4 /6 P( H and no. less than 4 ) = 1 /2× 4 /6 = 1 /2 × 2/ 6 = 2/6 = 1 /3

if this is wrong im very sorry, not on top on my math at the moment

6 0

3 years ago

William has a 26 -liter glass tank. First, he wants to put some marbles in it, all of the same volume. Then, he wants to fill th

Ann [662]

Answer: 0.06 litre or 60 ml

Step-by-step explanation:

Given: The capacity of glass tank= 26 liter

If he add 20.9 liters of water after 85 marbles to fill it completely, then

The volume of 85 marbles= $26-20.9=5.1\ liters$

Since, the marbles have same volume.

∴ Volume of each marble= $\frac{\text{volume of 85 marbles}}{\text{85}}$

⇒ Volume of each marble= $\frac{5.1\ litre}{85}=0.06\ liters$

In milliliters, Volume of each marble= $0.06\times1000=60ml$

4 0

3 years ago