All categories

3 years ago

Sara says if you subtract 17 from my number and multiply the difference by -7 you get -140. What is Sara's number?

Mathematics

2 answers:

Artist 52 [7]3 years ago

7 0

Answer:

(x-17)*(-7)=-140

x-17=20

x=37

Step-by-step explanation:

son4ous [18]3 years ago

5 0

Answer:

Step-by-step explanation:

-140 ÷ - 7

= 20 (the difference)

20 + 17

= 37

You might be interested in

In a one-way ANOVA, what is the difference between the among-groups variance MSA and the within-groups variance MSW?

LuckyWell [14K]

Answer:

$MSR=MSA=\frac{SSR}{k-1}$

And $MSE=MSW=\frac{SSE}{N-k}$

The difference is that MSA takes incount the variation between the groups and the grand mean, and the MSW takes in count the variation within groups respect to the mean of each group .

Step-by-step explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

If we assume that we have $j$ groups and on each group from $j=1,\dots,j$ we have $n_j$ individuals on each group we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2$

$SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2$

$SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2$

And we have this property

$SST=SS_{between}+SS_{within}=6750+8000=14750$

The degrees of freedom for the numerator on this case is given by $df_{num}=k-1$ where k represent the number of groups.

The degrees of freedom for the denominator on this case is given by $df_{den}=df_{between}=N-k$ .

And the total degrees of freedom would be $df=N-1$

We can find the $MSR=MSA=\frac{SSR}{k-1}$

And $MSE=MSW=\frac{SSE}{N-k}$

The difference is that MSA takes incount the variation between the groups and the grand mean, and the MSW takes in count the variation within groups respect to the mean of each group .

And the we can find the F statistic $F=\frac{MSR}{MSE}=$

8 0

3 years ago

Please help square root math

pantera1 [17]

Answer:

2<∛13<3 1<∛6<2

Step-by-step explanation:

Lets find the integers a and b ∛13 lies between.

a<∛13<b

a³<13<b³

=> a=2 so 2³=8 and b=3 so 3³=27 8<13<27

Similarly a<∛6<b

a³<6<b³

a=1 and b=2

7 0

3 years ago

Which equation is equivalent to log Subscript 3 Baseline (x 5) = 2?.

grin007 [14]

The equivalent equation is x - 4 = 0.

<h2>Linear system</h2>

It is a system of an equation in which the highest power of the variable is always 1. A one-dimension figure that has no width. It is a combination of infinite points side by side.

<h3>Simplification</h3>

Simplification is to make something easier to do or understand and to make something less complicated.

Given

The expression is $\rm log_3(x + 5) = 2$ .

The equivalent equation.

<h3>How to find the equivalent equation.</h3>

The expression is $\rm log_3(x + 5) = 2$ .

On simplifying. we get

$\begin{aligned} \rm log_3(x + 5) &= 2\\x + 5 &= 3^2\\x + 5 &= 9 \\x &= 9 - 5\\x &= 4\\x - 4 &= 0\\\end{aligned}$

The equivalent equation is x - 4 = 0.

More about the linear system link is given below.

brainly.com/question/20379472

4 0

3 years ago

The distance DA between earth and the sun is 93,000,000 miles, the distance DE between earth and the moon is 240,000 miles, and

Rudiy27

Answer:

Step-by-step explaidknation:

6 0

3 years ago

2x+5y how do i simplify this or do i just leave this as that

zheka24 [161]

Since they are not like terms (not the same variables) you cannot simply so you leave it like that.✨ This applies for addition and subtraction only. It’s different with multiplication and division.✨

8 0

2 years ago