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How to find

Answer: x=95 and y=17

Step-by-step explanation:

X-y=78

6y=7+x

6y-7=x

6y-7-y=78

5y-7=78

5y=85

y=17

x-17=78

x=78+17

x=95

Answer:

x=143

y=25

thus ur two numbers are 143 and 25

Answer:

D

Step-by-step explanation:

The income is given by:

[tex]y=-0.5x^2+6x+90[/tex]

And the costs are given by:

[tex]y=2.5x+30[/tex]

Where x is the number of units sold, in hundreds, and y is the total dollar amount, in thousands.

We want to find a viable solution for the number of units sold that would cause the income and cost to be the same.

So, we can set the two equations equal to each other and solve for x. Therefore:

[tex]-0.5x^2+6x+90=2.5x+30[/tex]

Subtract 2.5x and 30 from both sides:

[tex]-0.5x^2+3.5x+60=0[/tex]

Remove the decimals and the negative of the leading coefficient by multiply both sides by -2:

[tex]x^2-7x-120=0[/tex]

Factor. We can use -15 and 8. So:

[tex](x-15)(x+8)=0[/tex]

Zero Product Property:

[tex]x=15 \text{ or } x=-8[/tex]

The answer must be positive since we cannot sell negative units.

So, the value of x is:

[tex]x=15\text{ or } 1,500 \text{ units}[/tex]

Then using either equation, the value will be:

[tex]2.5(15)+30=67.5=\$67,500[/tex]

Our answer is D.

Answer:

d. 1,500 units sold and a value of $67,500

Step-by-step explanation:

Answer:

its all sides are equal and diagonal make 90° angle.

so, the answer option c.

Answer:

2419200 seconds

Step-by-step explanation:

this is the answer to your question

Answer: 2 cakes.

Step-by-step explanation:

There will be a total number of 6 people at Eli's cake party.

You want that each one of these 6 people to eat at least 1/5 of a cake.

Then you need to make, at least, 6 times 1/5 of a cake.

This is equal to:

6*(1/5) of a cake = 6/5 of a cake.

And we can rewrite this as:

(6/5) of a cake = (5 + 1)/5 of a cake = (5/5 + 1/5) of a cake = 1 cake + 1/5 of a cake.

But you can not bake only 1/5 of a cake, we need whole numbers.

Then we need to round up to the next whole number, which is 2.

This means that you need to bake at least 2 cakes.

Answer:

50$

Step-by-step explanation:

Answer:

Step-by-step explanation:

this is a rational function thus the domain is all real numbers except the values which make zero to denominator

hence x-4=0 ;x=4

the domain of that function is R- {4}

Answer:

45

Step-by-step explanation:

+hhsbsbbsjahsgsbsnkakwhsgevssv

Answer:

-18

Step-by-step explanation:

just multiply 9 and -2, and you'll get -18

Answer:

the first one is 6 ,9, 13.5

Step-by-step explanation:

Answer:

mid point={(7-1)/2,(1-5)/2=(3,-2)

Answer:

the answer of decimal is 331.82

Answer:

multiply 3 by both numbers in the parenthesis (answer is 30)

Step-by-step explanation:

3(4+6) you would do 3*4 and 3*6 so 12 and 18 add them you get 30

Answer:

70% of 300 is 210

-4(x+y)

= -4x - 4y

pls give me brainliest

Answer:

Please include the table below and the question

Step-by-step explanation:

Answer:

What is that?

Step-by-step explanation:

Answer:

Sure I do not know how to join others tho and I don't have wifi sadly :(

Step-by-step explanation:

Answer:

look below

Step-by-step explanation:

1*2=1

2^2=4

3^2=9

4^2=16

5^2=25

6^2=36

7^2=49

8^2=64

9^2=81

10^2=100

11^2=121

12^2=144

13^2=169

14^2=196

15^2=225

I had to memorize all of these up to 20 squared 2 years ago lol

Answer:

64

Step-by-step explanation:

Answer: 64. 16^6 = 16,777,216 and 32^6 is 1,073,741,824. 1,073,741,824 divided by 16,777,216 is 64

Answer:

Answer is A

Step-by-step explanation:

when u multiply 2789 x 3.875 u will get 10807.375 so now u have to figure out which answer give a greater amount of number than that, when you try the first answer which is 2800 x 4 u will get 11200 which is greater than the original equation

Answer:

The amount is $2367.32 and the interest is $1267.32

Step-by-step explanation:

Answer: 4

Step-by-step explanation:

Matthew makes a drink using lemonade and orange juice.

210ml of his drink was lemonade

140ml of his drink was orange juice

Based on the above, we can see that the ratio of lemonade to orange juice is 3:2. 70 is a common factor to 210 and 140. 210/70 = 3 while 140/70 = 2.

Therefore, since Rosie uses 6 litres of lemonade, the amount of orange juice that Rosie use will be:

= 6 × 3/2

= 4

Rosie needs 4 litres of orange juice.

Since x=7 is a vertical line, the slope is undefined. To find an equation that is parallel, the slopes must be equal. Since the slope is undefined, the slope of the parallel line is also undefined. However answer is x=4.

Answer:

19

Step-by-step explanation:

19 - 16 = 3

Answer:

Step-by-step explanation: Speed is distance an object travelled per unit time.

It is represented by letter v and can assume various units.

1) [tex]v=\frac{distance}{time}=\frac{d}{t}[/tex]

[tex]v=\frac{90}{5}[/tex]

v = 18 miles per hour

Her average speed is 18 mph.

2) Rearraging formula for distance:

d = v.t

d = 70 * 4

d = 280 miles

You would travel 280 miles.

3)  [tex]v=\frac{d}{t}[/tex]

[tex]v=\frac{315}{6}[/tex]

v = 52.5 mph

My average speed is 52.5 mph.

4) Rearranging formula to determine time:

[tex]t=\frac{d}{v}[/tex]

[tex]t=\frac{210}{90}[/tex]

t = 2.34 hours

It will take 2 hours and half to arrive in Leeds. So, we will be expected to arrive at 12:04.

5) The unit change but the way of calculating time is the same.

[tex]t=\frac{2000}{4}[/tex]

t = 500 s

or t = 8.34 minutes

It will take, for an athlete to run 2000m, 8.34 minutes.

6) a) All units must match, so for a speed in mph:

45 minutes is 0.75 hours. Total time is 8.75 hours.

[tex]v=\frac{420}{8.75}[/tex]

v = 560 mph

The average speed is 560 mph.

b) [tex]t=\frac{d}{v}[/tex]

[tex]t=\frac{420}{63}[/tex]

t = 6.67 hours

Sam will take 6.67 hours to covered the distance.

Answer:

8 square inches

Step-by-step explanation:

The formula for are is A=wl if we plug our numbers in we have A=4x2=8  In other terms we now know A=8

Answer: 36 hours

Step-by-step explanation:

t = total hours

t = 5d + 8w

t = 5(4) + 8(2)

t = 20 + 16

t = 36

Answer:

178.1

Step-by-step explanation:

In the first blank, write in 7 for x, and in the second blank, write in 8 for y.  Then perform the indicated multiplication and addition.

12.3(7) + 11.5(8), or

86.1    +  92   =   178.1

Answer:

18 I believe

Step-by-step explanation:

72/4

Answer:

each friend got 18 bows

to find how many bows each friend got;

total ÷ amount of friends=

72÷4 = 18

(to find amount she gave her friends individually;

amount each friend got - amount her mom gave them

= 18-6=12)