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2 years ago

20 pages in 4 days = pages per day

Mathematics

2 answers:

sammy [17]2 years ago

7 0

Answer: 5

Step-by-step explanation:

because if you multiply 5 times 4 is 20 so you just need to divied 20 to 4 so you get 5.

solmaris [256]2 years ago

4 0

Answer:

5 pages per day

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You and your sister share a car with your mom. You get to use the car every fourth day. Your sister gets the car every fifth day

nadya68 [22]

Answer:

20th day

Step-by-step explanation:

you: 4,8,12,16,20,24

sister:5,10,15,20,25

20 is the day where they meet

3 0

3 years ago

Solve equation, check for extraneous solutions

fiasKO [112]

Start with

$1=\dfrac{1}{n^2}+\dfrac{n^2-4n-5}{3n^2}$

We observe that both fractions are not defined if $n=0$ . So, we will assume $n \neq 0$ .

We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

$1=\dfrac{3}{3n^2}+\dfrac{n^2-4n-5}{3n^2} = \dfrac{n^2-4n-2}{3n^2}$

We multiply both sides by $3n^2$ :

$n^2-4n-2=3n^2$

We move everything to one side and solve the quadratic equation:

$2n^2+4n+2=0 \iff 2(n^2+2n+1)=0 \iff 2(n+1)^2=0 \iff n+1=0 \iff n=-1$

We check the solution:

$1=\dfrac{1}{1}+\dfrac{1+4-5}{3} \iff 1 = 1+0$

which is true

8 0

3 years ago

Mai has picked picked 1 cup of strawberries for a cake, which is enough for 3/4 of the cake. How many cups does she need for the

Naily [24]

She will need 1/3 cup because she has already covered 3/4

8 0

3 years ago

Read 2 more answers

Help!!

Elza [17]

Answer:

$(b)\ 2x - 9 = -1$

$(c)\ -2x + 12 = 4$

$(e)\ 2(x - 10) = -12$

Step-by-step explanation:

Required

Which equals $x = 4$

$(a)\ 2x + 6 = 2$

Collect like terms

$2x = 2 - 6$

$2x = -4$

Divide both sides by 2

$x = -2$

$(b)\ 2x - 9 = -1$

Collect like terms

$2x = -1 + 9$

$2x = 8$

Divide both sides by 2

$x = 4$

$(c)\ -2x + 12 = 4$

Collect like terms

$-2x =- 12 + 4$

$-2x =-8$

Divide both sides by -2

$x = 4$

$(d)\ 2(x + 2) = 10$

Divide both sides by 2

$x + 2 =5$

Collect like terms

$x = 5-2$

$x = 3$

$(e)\ 2(x - 10) = -12$

Divide both sides by 2

$x - 10 = -6$

Collect like terms

$x = 10 - 6$

$x = 4$

Hence, the equations with the required solution are:

$(b)\ 2x - 9 = -1$

$(c)\ -2x + 12 = 4$

$(e)\ 2(x - 10) = -12$

3 0

2 years ago

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Vika [28.1K]

Answer:

-1.9b + 7.8

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

20 pages in 4 days = pages per day​

20 pages in 4 days = pages per day