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3 years ago

I WILL MARK BRAINLIEST IF GOTTEN RIGHT!!!!!!!

Mathematics

1 answer:

Alex17521 [72]3 years ago

4 0

Answer:

a I don't know I just guess I hope you got it right I hope

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1) What is the first x in x + 3x = 16?

Lyrx [107]

1. x=22/5
2. x=4
3. x=4

5 0

3 years ago

Lucia has 50 sports cards she has 20 football cards 10 baseball card 15 basketball card and five hockey cards a single card is s

Ket [755]

The probability that the card is a football card is 20 out of 50 or 40%
the probability that the card is a basketball card is 10 out of 50 or 20%

4 0

3 years ago

Read 2 more answers

How do you Solve. 21r<7

kirza4 [7]

Answer:

r < 1/3

Step-by-step explanation:

21r<7

Divide each side by 21

21r/21<7/21

r < 1/3

4 0

3 years ago

Read 2 more answers

Express 3.3.3.5.5 using exponents

nadya68 [22]

I assume you mean 3*3*3*5*5 it would be 3^3 times 5^2. thats as simplified as i can make it. hope this helps! if anyone knows a better way to put these please post.

7 0

3 years ago

This table gives a few (x, y) pairs of a line in the coordinate plane. What is the x-intercept of the line?

PIT_PIT [208]

Answer:

Step-by-step explanation:

The x-intercept of a line is the value of x that makes y=0.

A line can be expressed in its slope-intercept form:

y=mx+b

Once determined the equation of the line, the x-intercept can be calculated by setting y=0 and solving for x.

Let's find the slope of the line.

Suppose we know the line passes through two points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

$\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

Let's pick the first two points of the table (-94,24) (-74,18). The slope is:

$\displaystyle m=\frac{18-24}{-74+94}=\frac{-6}{20}=-\frac{3}{10}$

The equation of the line is:

$\displaystyle y=-\frac{3}{10}x+b$

Now use one of the points to find b, for example (-94,24):

$\displaystyle 24=-\frac{3}{10}\cdot (-94)+b$

Operating:

$\displaystyle 24=\frac{141}{5}+b$

Solving:

$b=24-\frac{141}{5}=-\frac{21}{5}$

The complete equation of the line is:

$\displaystyle y=-\frac{3}{10}x-\frac{21}{5}$

To find the x-incercept, set y=0 and solve:

$\displaystyle 0=-\frac{3}{10}x-\frac{21}{5}$

$\displaystyle x=\frac{\frac{21}{5}}{-\frac{3}{10}}=-\frac{21}{5}\cdot \frac{10}{3}$

x=-14

5 0

3 years ago