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3 years ago

14

I do not understand numbers 3 and 4

1 answer:

Margaret [11]3 years ago

8 0

3. jenny has 21 years old

and matthew is 42

4.juan has 48 years oldand his sister has 40

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10. ''Saving electricity in our homes is saving our money.'' Mention five ways of saving energy.

Elis [28]

Answer:

Some ways of saving energy include : turn off the fan / lights when you leave a room, hang your clothes out to dry, don't run your dishwasher half full, turn off the water when your not using it, don't stand in front of an open refrigerator door. Hope this helps :)

7 0

3 years ago

What are the x and y-intercepts of the line described by the equation?

Semmy [17]

Step-by-step explanation:

x intercept is at y=0

2x= 12.4

x = 6.2

y intervept is at x=0

4y= 12.4

y = 3.1

7 0

4 years ago

olasank [31]

A,b,d are the answer

4 0

3 years ago

Zinaida [17]

Answer:

$\frac{x}{5}-6=15$

(addition property of equality)

$\frac{x}{5}=21$

(multiplication property of equality)

$x=105$

Step-by-step explanation:

Given:

$\frac{x}{5}-6=15\\\frac{x}{5}=21\\x=105$

To find: appropriate properties to justify each step

Solution:

According to division property of equality, if both sides of an equation are divided by the same nonzero number, the sides remain equal.

According to multiplication property of equality, if both sides of an equation are multiplied by the same nonzero number, the sides remain equal.

According to addition property of equality, if same number is added to both sides of an equation, the sides remain equal.

According to subtraction property of equality, if same number is from both both sides of an equation, the sides remain equal.

$\frac{x}{5}-6=15$

Add 6 to both sides ( addition property of equality )

$\frac{x}{5}-6+6=15+6\\\\\frac{x}{5}=21$

Multiply both sides by 5 (multiplication property of equality)

$\frac{x}{5}=21\\\frac{x}{5}(5)=21(5)\\ x=105$

3 0

3 years ago

PLEASE HELP<br><br><br> Solve.<br><br> 5x+2/2 = 2x - 1<br><br> X = ________ ?

lakkis [162]

5x + 2/2 = 2x - 1
2/2 is basically 1 so
5x + 1 = 2x - 1
isolate the variable
5x + 1 = 2x - 1
-1 -1
5x = 2x -2
-2x -2x
3x = -2
solve
3x/3=-2/3
x=-2/3

4 0

4 years ago