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4 years ago

10

Is asking and answering the only thing to do on this app?

2 answers:

SpyIntel [72]4 years ago

6 0

Yes pretty much. It is very helpful with homework and school problems. Please give brainliest.

Tresset [83]4 years ago

6 0

Yes you help other people with problems and you earn points to ask your own questions

You might be interested in

The ratio of books to magazines at jess house is 5:3 they are 21 magazines at jess house how many books are there?

TiliK225 [7]

First, 5/3 = 1.6
21 x 1.6 = 34.99999999
But, when I put it in a calculator, the 1.6 was repeated so:
Round 34.99999999 to 35
35 books

6 0

3 years ago

Read 2 more answers

Question 1: Classify the system of equations and identify the number of solutions. 7x + 3y = 10 3y = 9 − 7x Answers: consistent,

Vladimir [108]

Answer:

1. The equations is inconsistent and has no solution

2. The equations is consistent and has no solution

3. A pen costs $1.50 and a notebook costs $2.00

Step-by-step explanation:

Solving $7x + 3y = 10$ and $3y = 9 - 7x$

$7x + 3y = 10$ --- Equation 1

$3y = 9 - 7x$ --- Equation 2

Add 7x to both sides in equation 2

$7x + 3y = 9 - 7x + 7x$

$7x + 3y = 9$ --- Equation 3

Subtract equation 3 from 1

$(7x + 3y = 10) - (7x + 3y = 9)$

$7x - 7x + 3y - 3y = 10 - 9$

$0 + 0 = 1$

$0 \neq 1$

The equations is inconsistent and has no solution

Solving $3x + y = 4$ and $12x + 4y = 16$

$3x + y = 4$ -- Equation 1

$12x + 4y = 16$ ---- Equation 2

Make y the subject of formula in equation 1

$y = 4 - 3x$

Substitute 4 - 3x for y in equation 2

$12x + 4(4 - 3x) = 16$

$12x + 16 - 12x = 16$

Collect Like Terms

$12x - 12x = 16 - 16$

$0 = 0$

The equations is consistent and has no solution

3. Solving <em>John and Harry</em>

Given;

<em>Represent Pen with P and Notes with N</em>

John: $3P + 8N = 20.5$

Harry: $4P + 5N = 16.00$

Required

Find P and N

Make P the subject of formula in equation 2

$4P = 16 - 5N$

$P = \frac{16 - 5N}{4}$

Substitute $P = \frac{16 - 5N}{4}$ in equation 1

$3P + 8N = 20.5$

$3(\frac{16 - 5N}{4}) + 8N = 20.5$

Open the bracket

$\frac{48 - 15N}{4} + 8N = 20.5$

Take LCM

$\frac{48 - 15N + 32N}{4} = 20.5$

$\frac{48 + 17N}{4} = 20.5$

Multiply both sides by 4

$4 * \frac{48 + 17N}{4} = 20.5 * 4$

$48 + 17N = 82$

Subtract 48 from both sides

$48 - 48 + 17N = 82 - 48$

$17N = 82 - 48$

$17N = 34$

Divide both sides by 17

$17N/17 = 34/17$

$N = 34/17$

$N = 2$

Substitute 2 for N in $P = \frac{16 - 5N}{4}$

$P = \frac{16 - 5 * 2}{4}$

$P = \frac{16 - 10}{4}$

$P = \frac{6}{4}$

$P = 1.5$

<em>Hence, a pen costs $1.50 and a notebook costs $2.00</em>

5 0

3 years ago

What type of number is this: 5 3/4?

TiliK225 [7]

Answer:

it’s mixed number

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

a rhyolite rock has a volume of 9.5 ml. the density of the rock is 2.6 g/cm. what is the mass of the rock

barxatty [35]

3.653846153846154

Density = Mass/Volume
Density = 9.5/2.6 ≈ 3.65 g

3 0

3 years ago

The Royal Fruit Company produces two types of fruit drinks. The first type is 35% pure fruit juice, and the second type is 100%

8_murik_8 [283]

Answer:

pints of 35% pure fruit juice used=26.15

pints of 100% pure fruit juice used= 73.84

Step-by-step explanation:

Let

x =pints of 35% pure fruit juice

100-x=pints of 100% pure fruit juice

35%x+100%(100-x) =45%(260)

0.35x+ 100 - 1x = 117

-.0.65x= - 17

x= 26.15

100-x= 73.84

ans:

pints of 35% pure fruit juice used=26.15

pints of 100% pure fruit juice used= 73.84

4 0

4 years ago