All categories

3 years ago

PLZZ HELPP!!! pic attached (30 points)

Mathematics

1 answer:

natima [27]3 years ago

7 0

Answer:

Figure it out dummy this is easy

Step-by-step explanation:

You might be interested in

15 postcards, 10 envelopes, and a notepad cost 1 dollar and 68 cents. The envelope is 8 times cheaper than the notepad and 2 cen

Vlad1618 [11]

15 postcards, 10 envelopes, and a notepad cost------------------- 1.68 dolars

Postcards------------x

Envelopes------------y

Notepad--------------z

15x+10y+z=1.68

Y=z/8 y=0.02+x

Z=8y x=y-0.02

15(y-0.02)+10y+8y=1.68

15y-0.30+18y=1.68

33y=1.98 y=0.06

Z=8*0.06=0.48

X=0.06-0.02=0.04

Costs

Postcards------------0.04 dolars/ 4 cents

Envelopes------------0.06 dolars/ 6 cents

Notepad--------------0.48 dolars/ 48 cents

3 0

4 years ago

How do we define argument? What is the basic structure of an argument?

Kazeer [188]

Its c cause its like method or principle of reasoning

4 0

3 years ago

Read 2 more answers

What is the value of x? Enter your answer in the box. x =

d1i1m1o1n [39]

Answer:

x=20

Step-by-step explanation:

We can use similar triangle to find x. Put the smaller triangle over the larger triangle.

11 10

-------- = ----------

121+11 10 +5x+10

Combine like terms

11 10

-------- = ----------

132 20+5x

Using cross products

11 (20+5x) = 132*10

Distribute

220 +55x = 1320

Subtract 220 from each side

220-220 +55x = 1320-220

55x = 1100

Divide by 55

55x/55= 1100/55

x =20

6 0

3 years ago

What is the total surface area??? Please help

DedPeter [7]

Answer:

216

Step-by-step explanation:

8(6) + (10+6+8)(7)

48 + 24x7

48 + 168

216

7 0

3 years ago

A rectangle has a length of 23 feet less than 10 times it’s width . If the area of the rectangle is 770 square feet find the len

Tresset [83]

Answer:

The length of the rectangle is 54 feet .

Step-by-step explanation:

Given as :

The Area of rectangle = 770 square feet

The length is 23 feet less than 10 times its width

I.e Let The length of rectangle = L feet

And The breadth of rectangle = B feet

According to question

Length = 10 times width - 23

Or , L = 10 × B - 23

or, L = 10 B - 23

Now, Since Area of rectangle = A = Length × Breadth

Or, A = L × B

Or, 770 ft² = ( 10 B - 23 ) × B

Or, 770 = 10 B² - 23 B

Or, 10 B² - 23 B - 770 = 0

Now, solving this quadratic equation to get the value of B

Or, B = $\frac{-b\pm \sqrt{b^{2}-4\times a\times c}}{2\times a}$

or, B = $\frac{23\pm \sqrt{(-23)^{2}-4\times 10\times (-770)}}{2\times 10}$

Or, B = $\frac{-23\pm \sqrt{31329}}{20}$

Or, B = $\frac{-23 + 177}{20}$ , $\frac{-23 - 177}{20}$

∴ B = 7.7 , -10

So, The breadth of the rectangle = B = 7.7 feet

So, The length of the rectangle = L = ( 10 × 7.7 - 23 )

I.e L = 54 feet

Hence The length of the rectangle is 54 feet . Answer

6 0

3 years ago