All categories

3 years ago

4(7-8n)=-2n+8(6-5n) point slope from

Mathematics

1 answer:

Viefleur [7K]3 years ago

8 0

Answer:

n = 2 i beleve

Step-by-step explanation:

i dont know if this is right but i did the math and im in 6th grade so im not really good with that stuff

<3 have a good day <3

You might be interested in

A restaurant offers delivery for their pizzas. The total cost is a delivery fee added to the price of the pizzas. One customer p

ludmilkaskok [199]

Answer

Find out the how many pizzas are delivered to a customer who pays $80 .

To prove

As given

A restaurant offers delivery for their pizzas.

The total cost is a delivery fee added to the price of the pizzas.

One customer pay $25 to have 2 pizzas delivered.

$Let\ us\assume\ cost\ of\ the\ one\ customer\ pay = x_{1} = 25$

$Let\ us\assume\ number\ of\ pizza = y_{1} = 2$

Another customer pays $58 for 5 pizzas.

$Let\ us\assume\ cost\ of\ the\ second\ customer\ pay = x_{2} = 58$

$Let\ us\assume\ number\ of\ pizza = y_{2} = 5$

Thus by using the slope formula

$m =\frac{y_{2} - y_{1}}{x_{2} - x_{1}}$

Putting the value in the formula

$m = \frac{5 - 2}{58 - 25}$

$m = \frac{3}{33}$

Simplify the above

$m = \frac{1}{11}$

This represented one pizza cost is $11.

Thus 2 pizza cost = $11 × 2

= $22

Thus

Delivery price = Total cost of 2 pizza including delivery fee - Cost of 2 pizza

= $25 - $22

= $3

Thus 5 pizza cost = $11 × 5

= $55

Thus

Delivery price = Total cost of 5 pizza including delivery fee - Cost of 5 pizza

= $58 - $55

= $3

Therefore the delivery charge is $3.

Now calculate the number of pizza for the customer who pays $80.

Cost of the pizza = Total cost of the pizza including delivery charges - Delivery charges

= $80 - $3

= $ 77

Let us assume that the number of pizza for the customer who pays $80 = x

Cost of one pizza = $11

Than the equation becomes

11 × x = 77

$x = \frac{77}{11}$

x = 7

Therefore the number of pizza are 7 delivered to a customer who pays $80 .

4 0

3 years ago

Solve the equation for x: |5x - 61 = -10

shusha [124]

Answer:

x=51/5

Step-by-step explanation:

Add 61 on both sides

You'll have 5x=51

So now 51/5 is your answer.

5 0

3 years ago

Read 2 more answers

∆abc is isosceles, ab = bc, and ch is an altitude. how long is ac, if ch = 84 cm and m∠hbc = m∠bac +m∠bch?

Tems11 [23]

Given that ∆abc is isosceles and ab = bc, then m<bac = m<acb and m<hbc = 180 - m<bac - m<acb

Given that m∠hbc = m∠bac +m∠bch, then m<hbc + m<bch = m<bac + 2m<bch

But m<hbc + m<bch = 90°, thus 90° = m<bac + 2m<bch

Also, m∠bac + m∠ach = 90° ⇒ m<bac + 2m<bch = m<bac + m<ach ⇒ 2m<bch = m<ach

Since, Δabc is isosceles with ab = bc ⇒ m<bac = m<acb.

Also, m<acb = m<ach + m<bch ⇒ m<acb = 3m<bch = m<bac

Since m<bch : m<ach = 1 : 2 ⇒ bh : ah = 1 : 2

Thus, $bh:bc:ch=1:3:\sqrt{8}$

Given that ch = 84 cm, then

$\frac{bc}{ch} = \frac{bc}{84} = \frac{3}{\sqrt{8}} \\ \\ \Rightarrow bc= \frac{3\times84}{\sqrt{8}} =63\sqrt{2}=ab$

Now, $ah= \frac{2}{3} (63\sqrt{2})=42\sqrt{2}$

$ac= \sqrt{ch^2+ah^2} \\ \\ = \sqrt{84^2+(42\sqrt{2})^2} \\ \\ = \sqrt{7056+3528} = \sqrt{10584} \\ \\ =42\sqrt{6}$

6 0

3 years ago

Solve the quadratic equation by using the quadratic formula. 2x^2-5x+1=0

ioda

Answer:

$x = \frac{5 + \sqrt{17} }{4}$