Ask question

Ask question

All categories

3 years ago

8

A boy has 11 coins in dimes and quarters. Their value is $1.70. How many of each does he have?

1 answer:

nydimaria [60]3 years ago

3 0

0.10x + 0.25(11 - x) = 1.70

<em>It has the correct values </em>

You might be interested in

8. Solve X=Students & Y=Teachers<br> X+Y=24<br> X=3Y

Len [333]

Answer:

x=18, y= 6

Step-by-step explanation:

if x+y=24

x= 24- y

in second case

x= 3y

24_ y = 3y

24=4y

y= 6

hence x = 24 _6 = 18

5 0

3 years ago

A school assembly had 90 students in attendance, and 80% of them were first-graders. How many first-graders were at the assembly

Sav [38]

the answer is 72! Hope this helps! :)

5 0

3 years ago

Read 2 more answers

Question 17 of 33

butalik [34]

Answer:

C

Step-by-step explanation:

i took the test

8 0

3 years ago

a hot air ballon cruising at 1000 feet begins to ascend. it ascends at a rate of 200 feet per minute Writing problems into slope

Gnesinka [82]

Answer:

y=200x+1000

Step-by-step explanation:

5 0

3 years ago

Simplify the radical expression completely LaTeX: 3\sqrt{5}\:-\:3\sqrt{11}+2\sqrt{121}-3\sqrt{90}3 5 − 3 11 + 2 121 − 3 90 A. La

lora16 [44]

Answer:

$3\sqrt{5}\:-\:3\sqrt{11}+22-9\sqrt{10}$

Step-by-step explanation:

Given

$3\sqrt{5}\:-\:3\sqrt{11}+2\sqrt{121}-3\sqrt{90}$

Required

Simplify the expression

$3\sqrt{5}\:-\:3\sqrt{11}+2\sqrt{121}-3\sqrt{90}$

Express the square root of 121 as 11

$3\sqrt{5}\:-\:3\sqrt{11}+2 * 11-3\sqrt{90}$

$3\sqrt{5}\:-\:3\sqrt{11}+22-3\sqrt{90}$

Express 90 as 9 * 10

$3\sqrt{5}\:-\:3\sqrt{11}+22-3\sqrt{9 * 10}$

Split the surd to 2

$3\sqrt{5}\:-\:3\sqrt{11}+22-3\sqrt{9} * \sqrt10}$

Express the square root of 9 as 3

$3\sqrt{5}\:-\:3\sqrt{11}+22-3 * 3 * \sqrt10}$

$3\sqrt{5}\:-\:3\sqrt{11}+22-9 * \sqrt10}$

$3\sqrt{5}\:-\:3\sqrt{11}+22-9\sqrt{10}$

Hence, the result of the expression is

$3\sqrt{5}\:-\:3\sqrt{11}+22-9\sqrt{10}$

7 0

3 years ago