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4 years ago

?÷(−7)=(−4) what is the missing number

Mathematics

2 answers:

Degger [83]4 years ago

7 0

Answer:

? = 28

Step-by-step explanation:

Isolate the ?. Let "?" = x

x/(-7) = (-4)

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Multiply -7 to both sides:

(x/-7)(-7) = (-4)(-7)

x = -4 * -7

Simplify. Note that when you are multiplying or dividing two negative numbers, you will have a positive answer:

x = -4 * -7 = 4 * 7 = 28

28 is your answer.

Hunter-Best [27]4 years ago

3 0

Answer:

The answer is 28.

Step-by-step explanation:

To find the solution, you must multiply the other two numbers together to find the original number that is divided.

-7 * -4 = 28 Answer

28/-7 = -4

Hope this helps!

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Two parallel lines are crossed by a transversal. parallel lines c and b are cut by transversal a. on line c where it intersects

Ymorist [56]

It would just be 80. They are both in the bottom right and I'm guessing this is one the problems that look like this:

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4 0

3 years ago

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A certain company recently sold five-year $1000 bonds with an annual yield of 9.75%. After how much time could they be sold for

Brut [27]

Answer:

After 7 years and 5 months.

Step-by-step explanation:

Let x represent number of years.

We have been given that a certain company recently sold five-year $1000 bonds with an annual yield of 9.75%.

We can see that the value of bond is increasing exponentially, so we will use exponential growth formula to solve our given problem.

$y=a\cdot (1+r)^x$ , where,

y = Final value,

a = Initial value,

r = Rate in decimal form,

x = Time

$9.75\%=\frac{9.75}{100}=0.0975$

Substituting given values:

$y=1000\cdot (1+0.0975)^x$

$y=1000\cdot (1.0975)^x$

Since we need the selling price to be twice the original price, so we will substitute $y=2000$ in above equation as:

$2000=1000\cdot (1.0975)^x$

$\frac{2000}{1000}=\frac{1000\cdot (1.0975)^x}{1000}$

$2=1.0975^x$

Switch sides:

$1.0975^x=2$

Take natural log of both sides:

$\text{ln}(1.0975^x)=\text{ln}(2)$

Applying rule $\text{ln}(a^b)=b\cdot \text{ln}(a)$ :

$x\cdot \text{ln}(1.0975)=\text{ln}(2)$

$\frac{x\cdot \text{ln}(1.0975)}{\text{ln}(1.0975)}=\frac{\text{ln}(2)}{\text{ln}(1.0975)}$

$x=\frac{0.6931471805599453}{0.0930348659671894}$

$x=7.45040231265$

$x\approx 7.4504$

Since x represents time in years, so we need to convert decimal part into months by multiplying .4504 by 12 as 1 year equals 12 months.

7 years and 12*0.4504023 months = 7 years 5.4 months = 7 years 5 months

Therefore, after 7 years and 5 months the company could sold the bonds for twice their original price.

8 0

3 years ago

Show work and answer .............

Lelechka [254]

Answer:

1. 5

2. 5

3. -3

4.y= -1

5. 5

Step-by-step explanation:

1.)x- 2y= -25 ; y=3x

x-2(3x)=(-25)

x-6x=(-25) ; -5x=(-25) ; x=5

2.) 5x+3y =40; x=y

8y=40; y=5

3.) 4x-3y= -27; x=3y

4(3y)-3y= -27; 12y-3y=-27; 9y=-27; y=-3

4.)x-y=9; x=-8y; -8y-y=9; -9y=9; y=-1

5.) 2x+2y=30; y=2x ; 2x+2(2x)=30; 6x=30; x=5

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3 years ago

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joja [24]

Answer:

Step-by-step explanation:

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3 years ago

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erastovalidia [21]

Answer:

100/12

They will each have 8 ounces.

Step-by-step explanation:

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3 years ago

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