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3 years ago

1- 1/4 + 2/5= please help

Mathematics

2 answers:

zlopas [31]3 years ago

4 0

Answer:

1.15:)

Step-by-step explanation:

ZanzabumX [31]3 years ago

4 0

Answer:

1.15

Step-by-step explanation:

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The mean of four numbers is 70. When a fifth number is included, the mean of the five numbers is 80. What is the fifth number?

Yakvenalex [24]

<h3>Answer: 120</h3>

=============================================

Explanation:

S = sum of the first four values

S/4 = 70 since we divide the sum by 4 to get the mean of the first four values

S = 280 is the result after multiplying both sides by 4

Let x be the fifth unknown value. Adding it onto S leads to S+x = 280+x. This represents the sum of all five values.

Dividing that sum 280+x over 5 leads to the new mean 80, which leads to...

----------

(280+x)/5 = 80

280+x = 5*80

x+280 = 400

x = 400-280

x = 120

The fifth number is 120

3 0

2 years ago

25 Uma conta de gás, no valor de R$ 48,00, com

melisa1 [442]

Answer:

R$49.02

R$49.09

Step-by-step explanation:

Por não pagar a conta em dia, o valor de 2% de juros foi adicionado, o novo valor base passa a ser:

$V = 1.02*48\\V=R\$48.96$

O valor a ser pago n dias após o dia 13 de abril é dado por:

$P=48.96*(1+\frac{0.033}{100} )^n$

No dia 17 de abril, n =4 e o valor a ser pago é:

$P=48.96*(1+\frac{0.033}{100} )^4\\P=R\$49.02$

Caso n =8, o valor a ser pago seria:

$P=48.96*(1+\frac{0.033}{100} )^8\\P=R\$49.09$

6 0

3 years ago

Write an equation of the line that passes through (2, -5) and is parallel to the line 2y = 3x + 10.

Leto [7]

Answer:

Use the given slope and point to substitute into the point-slope formula y−y1=m(x−x1).

Slope-intercept form:

y=3x²+4x−25

Point-slope form:

y+5=(3x+10)⋅(x−2)

Step-by-step explanation:

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3 years ago

What type of decimal is this fraction:11/20 ?

joja [24]

Terminating because the decimal ends rather than going on forever which would be repeating

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Margaret bought 40 ounces of bananas for $5.00. How much did Robert pay for 12 ounces?

Brrunno [24]

It’s 57.23 dhe paided for

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2 years ago

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