All categories

3 years ago

Jim has answered 7 E-mails. This is 35% of the E-mails he must answer. How many E-mails does he need to answer?

Mathematics

1 answer:

leonid [27]3 years ago

4 0

7/x = 35/100
35x= 7 x 100
35x= 700
X=700/35
x= 20

You might be interested in

Write an equation of the line that passes through (6,-10) and is perpendicular To the line that passes through 4,-6) and (3,-4)

iVinArrow [24]

Answer:

all work is shown and pictured

7 0

2 years ago

Here is an expression.

sp2606 [1]

Answer:

Step-by-step explanation:

is the situation could the expression model.

6 0

1 year ago

If(√14/√7-2)-(√14/√7+2)=a√7+b√2 find the values of a and b where a and b are rational numbers

seraphim [82]

Answer:

a = 4/3 and b = 0

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

<h2>Given expression:</h2>

$\dfrac{\sqrt{14} }{\sqrt{7}-2} -\dfrac{\sqrt{14} }{\sqrt{7}+2}$

<h2>Simplify it in steps:</h2>

Bring both fractions into common denominator:

$\dfrac{\sqrt{14} (\sqrt{7}+2)}{(\sqrt{7}-2)(\sqrt{7}+2)} - \dfrac{\sqrt{14} (\sqrt{7}-2)}{(\sqrt{7}-2)(\sqrt{7}+2)}$

Simplify:

$\dfrac{\sqrt{14} ((\sqrt{7}+2) - (\sqrt{7}-2))}{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{\sqrt{14} (\sqrt{7}+2 - \sqrt{7}+2)}{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{4\sqrt{14} }{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{4\sqrt{14} }{(\sqrt{7})^2-2^2} =$

$\dfrac{4\sqrt{14} }{7-4} =$

$\dfrac{4}{3} \sqrt{14} }$

Compare the result with given expression to get:

a = 4/3 and b = 0

4 0

2 years ago

Ruth decides to use the method of proportions and similar triangles to find the height of a tree. She measures the length of the

musickatia [10]

Answer:

c. 24 ft

Step-by-step explanation:

if the 12 inch ruler casts a 6 inch shadow (shadow has half size) then a tree with 12 feet long shadow will have a height of 24 feet

5 0

2 years ago

Plsssssssssssssssssssssssssssss

cestrela7 [59]

Answer:

2.7 litres of solution

Step-by-step explanation:

8 0

2 years ago