All categories

4 years ago

PLEASE HELP!! Will give brainliest if you give explanation!

Mathematics

1 answer:

MArishka [77]4 years ago

3 0

The equation in slope-intercept is y=0.625x+7.

y = mx + b

where:
m is the slope of the line
b is the y-intercept of the line

The slope m of the line through any two points (x1, y1) and (x2, y2) is given by:

The y-intercept b of the line is the value of y at the point where the line crosses the y axis. Since for point (x1, y1) we have y1 = mx1 + b, the y-intercept b can be calculated by:

b = y1 - mx<span>1. hope that helped</span>

You might be interested in

Mrs. Salinas bought 10 pounds of a mixture made of M&Ms and peanuts. M&Ms sell for $3 pound. Peanuts sell for $2 pound.

jek_recluse [69]

Answer:

Mrs. Salinas buys 4 ounces M&Ms and 6 ounces Peanuts.

Step-by-step explanation:

Given,

Total weight of the mixture = 10 pounds.

Total money Mrs. Salinas paid = $24.

We have to find out the weight of each M&Ms and peanuts.

Solution,

Let the weight of M&Ms be x.

And the weight of peanuts be y.

Since total weight of the mixture is 10 pounds.

So, we can frame it in equation as;

$x+y=10\ \ \ \ \ equation\ 1$

Again, Total money paid by Mrs. Salinas is the sum of weight of M&Ms multiplied by price for each ounce and weight of peanuts multiplied by price for each ounce.

So, we can frame it in equation as;

$3x+2y=24\ \ \ equation\ 2$

Now, multiplying equation 1 by 2, we get;

$2(x+y)=10\times2\\\\2x+2y=20\ \ \ \ \ equation\ 3$

Now subtract equation 3 from equation 2, we get;

$(3x+2y)-(2x+2y)=24-20\\\\3x+2y-2x-2y=4\\\\x=4$

On substituting the value of x in equation 1, we get;

$x+y=10\\\\4+y=10\\\\y=10-4\\\\y=6$

Hence Mrs. Salinas buys 4 ounces M&Ms and 6 ounces Peanuts.

5 0

3 years ago

During a rock concert, the noise level (in decibels) in front row seats has a mean of 95 dB with a standard deviation of 8 dB. W

lorasvet [3.4K]

Answer:

$\frac{8}{9} *100= 88.89 \%$

So we have at least 88.89% of the noise level values within 3 deviation from the mean.

Step-by-step explanation:

For this case let define the random variable X as the noise level, we know the following properties for X:

$E(X) = 95 , Sd(X)= 8$

And for this case we don't know the distribution for the random variable X.

But we can use the Chebysev theorem who states that the minimum percentage of the data that lies within k standard deviations from the mean is given by:

$1 -\frac{1}{k^2}, k>1$

So for this case we have that k = 3 and if we use this theorem we have:

$1- \frac{1}{3^2}$

$1- \frac{1}{9}=\frac{8}{9}$

And we can convert this into % and we got:

$\frac{8}{9} *100= 88.89 \%$

So we have at least 88.89% of the noise level values within 3 deviation from the mean.

5 0

3 years ago

2. What is the solution to this equation?<br> 2 x + 3 = x - 4

ale4655 [162]

Answer:

x= -7

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Equation of a line...please help??

mezya [45]

The equation of a line is y=mx+b
To find the gradient you calculate the change in Y/change in X.
To find the y-intercept you should plug it in a graphic calculator.

8 0

3 years ago

Jaspers cafe has regular coffee and decaffeinated coffee. This morning , the café served 92 coffee In all , 25 % of which were r

RSB [31]

23 regular coffees were served.

25% means 1/4

25% x 92 = 23 regular coffees were served.

92 - 23 = 69 decaf coffees were served.

6 0

3 years ago