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Artemon [7]
3 years ago
7

Some help! i need someone to answer this for me!

Mathematics
1 answer:
vredina [299]3 years ago
7 0

Answer:

-27

Step-by-step explanation:

Substitute everything:

6^2/-4+ 6^2/-2

36/-4+36/-2

-9+-18

-27

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Alvin is 7 years younger than Elgas. The sum of their ages is 63. What is Elgas age?
Elden [556K]

Answer:

Elgas is 35.

Step-by-step explanation:

Let's set up an equation.

Alvin is 7 years younger than Elgas.

A = E - 7

The sum of their ages is 63.

A + E = 63

Let's use substitution.

Plug in the first equation of A into the second equation.

A + E = 63

(E - 7) + E = 63

Combine like terms.

2E - 7 = 63

Add 7 to both sides.

2E = 70

Divide both sides by 2.

E = 35

Elgas is 35.

Hope this helps!

6 0
3 years ago
Graph each inequality y-3x<-4
stealth61 [152]

graph each inequality y-3x<-4

First we solve the inequality for y

Add 3x on both sides, so inequality becomes

y < 3x -4

Now we graph it

for graphing , replace < symbol with = sign

y= 3x - 4

Now make a table, assume some number for x  and find out y

x         y

-1       y=3(-1)-4 = -7

0       y=3(0)-4 = -4

1       y=3(1)-4 = -1

Now plot (-1,-7), (0,-4) ,(1,-1) on graph

Join all the points and make a dotted line ( dotted line for <  or > symbol)

now we do shading

for < symbol we shade down

for > symbol we shade up

The graph is attached below







3 0
3 years ago
Solve for x.<br><br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B40%7D" id="TexFormula1" title="\frac{x}{40}" alt="\frac{
Rom4ik [11]

Answer:

The answer is C.

Step-by-step explanation:

In order to find x, you have to multiply both sides by 40 :

\frac{x}{40}  = 4

\frac{x}{40}  \times 40 = 4 \times 40

x = 160

6 0
4 years ago
Read 2 more answers
A diagonal of a cube measures
Gennadij [26K]

Answer: 7cm

Step-by-step explanation:

Use pythagorean theorum:

Variables:

Let the edge = A

Face diagonal (F) = 10cm

Inner diagonal (I) = sqrt(150) cm

A^2 = I^2 - F^2

A^2 = [sqrt(150)]^2 - 10^2

A^2 = 150 - 100

A^2 = 50

A = sqrt(50)

A = 7.0710678 cm

A = 7cm (to the nearest tenth)

so, length of an edge = 7cm

4 0
2 years ago
Solve the system of linear equations by elimination.<br><br> 2x+5y=16<br> 3x−5y=−1
andrew11 [14]

Hope you can read my handwriting XD You can see the rest when you open the picture.

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