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3 years ago

Please help!! I need help.

Mathematics

2 answers:

Arada [10]3 years ago

7 0

Answer:

couch)14

chair)3

lamp)5

bed)6.25

table)10

Step-by-step explanation:

so, the whole question basically asks you to convert the units back and forth, (its very similar to the conversion of currency) & There are many ways to do this, ill show one of the methods, if u don't understand then i can show u another way....

ill do the first two-

COUCH-

1 inch: 0.5 ft

x inch:7ft { x is the missing value ((model length of couch)) }

Now cross multiply

0.5x=7*1

x=7/0.5

x=14 inches

CHAIR-

1 inch: 0.5 ft

6 inch: x

Do the same step -Cross multiply

1x=0.5*6

x=3/1

x=3

FrozenT [24]3 years ago

4 0

Answer:

14, 3, 5, 6.25, 10

Step-by-step explanation:

The scale is 1 inch = 0.5 ft.

Either divide the inches by 2 or multiply the feet by 2

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Use the grouping method to factor this polynomial x ^ 3 + 2x ^ 2 + 7x + 14

elena55 [62]

Answer:

B. ( $x^{2}$ +7)(x+2)

Step-by-step explanation:

The greates common factor between 7 and 14 is 7 so you know that one of the terms is going to be 7....but what times 7 equals 14...2

So we know that in one set of parentheses its going to be (something +2) and in another (something +7)

Well if we know that one is going to be 2, how do we go from 2 to 2 $x^{2}$ .....2 times $x^{2}$ equals $2x^{2}$

So now we know that one set of parentheses is going to be (something + 2) times ( $x^{2}$ +7)

So lastly, we have to find out how to get $x^{3}$ but since we already have a $x^{2}$ in the second set of parentheses all we have to do is put a x in the first set because x times $x^{2} = x^{3}$

Hope this helps!

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3 years ago

Rise over run algebra one help please

Ainat [17]

Answer:

Slope is -3

Equation is y = -3x + 2

Step-by-step explanation:

(0 , 2) and ( -1 , 5)

m= (y2-y1)/(x2-x1)

m= (5 - 2)/(-1 -0)

m= 3/-1

m= -3

y - y1 = m(x - x1)

y - 2 = -3(x - 0)

y - 2 = -3x + 0

y = -3x + 2

4 0

2 years ago

$17,818 is invested, part at 11% and the rest at 6%. If the interest earned from the amount invested at 11% exceeds the interest

erma4kov [3.2K]

Answer:We know the total amount of money invested. $17818

x+y=17818,

We know that the difference in interest earned by the two accounts is $490.33

0.11*x-0.06*y=490.33

x=17818-y

We substitute for x

0.11*(17818-y)-0.06*y=490.33

We multiply out

1959.98-0.11y-0.06*y=490.33

We combine like terms.

1469.65=0.17*y

Isolate y

y=1469.65/0.17

y=8645 at 6%

Calculate x

x=17818-8645

x=9173 at 11%

Check

0.11*9173-0.06*8645=490.33

interest earned at 11%=1009.03

interest earned at 6%=518.70

1009.03-518.7=490.33

490.33=490.33

Since this statement is TRUE and neither amount is negative then all is well.We know the total amount of money invested. $17818

x+y=17818,

We know that the difference in interest earned by the two accounts is $490.33

0.11*x-0.06*y=490.33

x=17818-y

We substitute for x

0.11*(17818-y)-0.06*y=490.33

We multiply out

1959.98-0.11y-0.06*y=490.33

We combine like terms.

1469.65=0.17*y

Isolate y

y=1469.65/0.17

y=8645 at 6%

Calculate x

x=17818-8645

x=9173 at 11%

Check

0.11*9173-0.06*8645=490.33

interest earned at 11%=1009.03

interest earned at 6%=518.70

1009.03-518.7=490.33

490.33=490.33

Since this statement is TRUE and neither amount is negative then all is well.

8 0

3 years ago

Figure ABCD is reflected across the x-axis. What are the coordinates of A' , B' , C' , and D' ? Enter your answer by filling in

sp2606 [1]

Answer:

Step-by-step explanation:

A' (2,-3)

B' (5,-5)

C' (7,-3)

D' (5,-2)

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3 years ago

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Serhud [2]

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