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3 years ago

1/4 + 3/7 pls answer w workings out aswell!! thanks

2 answers:

6 0

Your answer is 19/28

First you find common denominators

1/4 and 3/7 both have 28 as a common denominator

Multiply the denominators to get the same denominator 1/4 by 7= 7/28 and 3/7 by 4= 12/28

Add that and you get 19/28 and it stays like that because you can’t simply it

xenn [34]3 years ago

3 0

Answer:

1/4 + 3/7 = 19/28

Step-by-step explanation:

Step 1: Find common denominator

Common denominator of 7 and 4 is 28 (since 7 × 4 = 28)

Step 2: Multiply fractions by the factor (equivalent to 1) that will bring each denominator to 28

1/4 × 7/7 = 7/28

3/7 × 4/4 = 12/28

Step 3: Simply add the newly-converted fractions

7/28 + 12/28 = 19/28

This fraction cannot be simplified, so the final answer is 19/28.

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3 years ago

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3 years ago

SBC is an isosceles triangle with main vertex S.

stira [4]

Answer + Step-by-step explanation:

1) D be the symmetric of B with respect to C then CD = BC

A the symmetric of C with respect to B then AB = BC

We obtain :

CD = BC

AB = BC

Then AB = CD

2) m∠SBA = 180 - SBC = 180 - SCB = m∠SCD

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4 0

2 years ago

Please help ASAP

sleet_krkn [62]

$A=P(1+ \frac{r}{n})^ \frac{t}{n}$
A=future amount
P=present amount
r=rate in decimal
n=number of times per year compounded
t=time in years

how many years to double
basically
A=2P at t=?
so we can simplify and ignore the pricipal given and do
$2=(1+ \frac{r}{n})^ \frac{t}{n}$
r=7%=0.07
n=2 (semiannualy means 2 times per year)
t=t

$2=(1+ \frac{0.07}{2})^ \frac{t}{2}$
$2=(1+ 0.035)^ \frac{t}{2}$
$2=(1.035)^ \frac{t}{2}$
take the ln of both sides
$ln2=(\frac{t}{2})ln1.035$
divide both sides by ln1.035
$\frac{ln2}{ln1.035} = \frac{t}{2}$
times 2 both sides
$\frac{2ln2}{ln1.035} =t$
use calculator
40.2976=t
nearest tenth
40.3
about 40.3 years

4 0

4 years ago

Elen planned to read a book of 40 pages in two days. On the first day, she read 4 hours reading 7 pages per hour. On the second

amm1812

Ok so 7 times 4 is 28 so she read 28 the first day. For the second day since 40-28= 12, 12 divided by 2 is 6. So she read 6 pages per hour.

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3 years ago

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