All categories

2 years ago

Please help me and show your work/explain.

Mathematics

2 answers:

olga nikolaevna [1]2 years ago

5 0

Answer:

5x+3x+20 =

8x + 20 =

8*100 + 20 =

800 + 20 =

820 ← answer

Step-by-step explanation: :)

HOPE THIS HELPS!!!

Westkost [7]2 years ago

4 0

Answer:

Sam solve for x instead of substituting 100 for x

Step-by-step explanation:

5x+3x+20

5(100)+3(100)+20

500+300+20

820

You might be interested in

19) Write 987% in decimal form

RideAnS [48]

9.87 because when converting from a percent to decimal, you always move the decimal back 2 spaces.

8 0

2 years ago

Read 2 more answers

Please can I have an explanation also, I am terrible at these kinds of questions!

wlad13 [49]

Answer:

<em>The fraction of the beads that are red is</em>

Step-by-step explanation:

<u>Algebraic Expressions</u>

A bag contains red (r), yellow (y), and blue (b) beads. We are given the following ratios:

r:y = 2:3

y:b = 5:4

We are required to find r:s, where s is the total of beads in the bag, or

s = r + y + b

Thus, we need to calculate:

$\displaystyle \frac{r}{r+y+b} \qquad\qquad [1]$

Knowing that:

$\displaystyle \frac{r}{y}=\frac{2}{3} \qquad\qquad [2]$

$\displaystyle \frac{y}{b}=\frac{5}{4}$

Multiplying the equations above:

$\displaystyle \frac{r}{y}\frac{y}{b}=\frac{2}{3}\frac{5}{4}$

Simplifying:

$\displaystyle \frac{r}{b}=\frac{5}{6} \qquad\qquad [3]$

Dividing [1] by r:

$\displaystyle \frac{r}{r+y+b}=\displaystyle \frac{1}{1+y/r+b/r}$

Substituting from [2] and [3]:

$\displaystyle \frac{r}{r+y+b}=\displaystyle \frac{1}{1+3/2+6/5}$

Operating:

$\displaystyle \frac{r}{r+y+b}=\displaystyle \frac{1}{\frac{10+3*5+6*2}{10}}$

$\displaystyle \frac{r}{r+y+b}=\displaystyle \frac{10}{10+15+12}$

$\displaystyle \frac{r}{r+y+b}=\displaystyle \frac{10}{37}$

The fraction of the beads that are red is $\mathbf{\frac{10}{37}}$

8 0

2 years ago

Simplify then factor

erastova [34]

U.s marine core semper fi

5 0

2 years ago

12/y +9 at y =6 solve

liubo4ka [24]

Answer:

Step-by-step explanation:

12/6 =2 +9=11

3 0

2 years ago

Read 2 more answers

If there is a 4:6 ratio of dogs to cats in the store. What percentage of the store are dogs?

Liono4ka [1.6K]

60% of the store is dogs.

6 0

2 years ago

Read 2 more answers

Please help me and show your work/explain.​

Please help me and show your work/explain.