3 years ago

Solve the equation 7z=105

Mathematics

1 answer:

zmey [24]3 years ago

4 0

The answer is 15 because u divide 7 on both sides

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Helene invested a total of $1,000 in two simple-interest bank accounts. One account paid 8% annual interest; the other paid 9% a

Lelu [443]

Answer: -600 and 1600 were invested into the two accounts.

Step-by-step explanation:

x = amount invested in the first account.

y = amount invested in the second account.

You start off with this equation

$x + y = 1000$

$0.08x + 0.09y=86$

Subtract both sides by y.

$x=1000-y$

Subsitude 1000 - x for x for the second equation.

$0.08(1000-y)+0.09y=$86$

Use the distributive property to solve for y.

$80-0.08y+0.09y=86$

$80-0.01y=86$

$6=-0.01y$

$=-600$

Subsitude -600 for y in the first equation and solve for x.

$x-600=1000$

$x=1600$

-600 and 1600 were invested into the two accounts.

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2 years ago

Please check screenshot

nata0808 [166]

Answer:

im sorry but whats the question exactly i will try to awnser it

Step-by-step explanation

6 0

3 years ago

40 POINTS!!!!!!!! The length of a rectangle is 7 millimeters longer than its width. The perimeter is more than 62 millimeters.

Arte-miy333 [17]

a) L = W + 7

b) 2 ( L + W ) > 62

c) 2 ( W + 7 + W ) > 62

2w+14+2w>62

4w+14>62

4w > 48

w > 12

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3 years ago

On a workday, the average decibel level of a busy street is 70 db, with 100 cars passing a given point every minute. if the numb

nignag [31]

70dB is represented by 100cars in 60sec. Therefore if the number of cats is reduced by 3/4 in the same amount of time(60s), then the decibel level will reduce by 3/4 also. So 70dB * .25= 17.5dB

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2 years ago

You purchased a 1.5-liter bottle of olive oil for $11.69. What was the cost per fluid ounce?

dlinn [17]

It would be approximately 23 cents per fluid ounce.

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2 years ago