Ask question

Ask question

All categories

3 years ago

6

The new TV costs $350. The family saved up $210 in September. In October they saved up $140. Do they have enough for the new TV

now?

1 answer:

bija089 [108]3 years ago

5 0

Answer:

yes

Step-by-step explanation:

210 + 140 is 350 give me brain and thanks

You might be interested in

The sum of three numbers is 8. The third is 9

Ierofanga [76]

Answer:

→<u> </u><u>First</u><u> </u><u>value</u><u> </u><u>is</u><u> </u><u>1</u>

→<u> </u><u>Second</u><u> </u><u>value</u><u> </u><u>is</u><u> </u><u>2</u>

→<u> </u><u>Third</u><u> </u><u>value</u><u> </u><u>is</u><u> </u><u>5</u>

Step-by-step explanation:

• let numbers be x, y and z

${ \tt{z = 8y - 9 - - - (eqn \: 1)}} \\ \\ { \tt{10x = 8y - 7 - - - (eqn \: 2)}} \\ \\ { \tt{x + y + z = 8 - - - (eqn \: 3)}}$

• from eqn 2, make x the subject:

${ \tt{x = \frac{8y - 7}{10} }} \\$

• substitute all variables in eqn 3:

${ \tt{ \frac{8y - 7}{10} + y + 8y - 9 = 8}} \\ \\ { \tt{8y - 7 + 10y + 80y - 90 = 80}} \\ \\ { \tt{98y = 177}} \\ \\ { \boxed{ \tt{ \: y = 1.8}}}$

• find z

${ \tt{z = 8y - 9}} \\ \\ { \tt{z = 8(1.8) - 9}} \\ \\ { \tt{z = 14.4 - 9}} \\ \\ { \boxed{ \tt{ \: z = 5.4 \: }}}$

• find x:

${ \tt{x = \frac{8(1.8) - 7}{10} }} \\ \\ { \tt{x = \frac{7.4}{10} }} \\ \\ { \boxed{ \tt{ \: x = 0.74 \: }}}$

Rounding to nearest value:

${ \boxed{ \rm{x = 1}}} \\ { \boxed{ \rm{y =2 }}} \\ { \boxed{ \rm{z = 5}}}$

7 0

2 years ago

Jonas is doing a science experiment with his class. The teacher has 21 fluid ounce of pond water to share equally with 10 pairs

tiny-mole [99]

2.1 ounces because you divide 21 by 10 which equals 2.1

3 0

3 years ago

Please simplify y-4x-(1-6x)+3y+x

andriy [413]

You have to combine like numbers

y-4x-1(1-6x)+3y+x

4y -4x-(1-6x)+x

4y - 4x - 1 + 6x + x

4y + 3x - 1

7 0

3 years ago

How many ways are there to select 25 books from a collection of 27 books? i am just studying today

laiz [17]

notice, this will just be a Permutation.

$\bf _nP_r=\cfrac{n!}{(n-r)!}\qquad \qquad \stackrel{\textit{25 books off a total of 27}}{_{27}P_{25}=\cfrac{27!}{(27-25)!}} \\\\\\ _{27}P_{25}=\cfrac{27!}{2!}\implies 5444434725209176080384000000$

you can always check your calculator also for a [ ₙPᵣ ] button.

4 0

3 years ago

Question 1<br> Find the area:<br> 110 cm<br> 50 cm<br> 140 cm<br> 180 cm

blagie [28]

A list of four length-measurements doesn't actually have an area.

On my screen, the list is about 2cm wide and 4cm tall, so its area would be about 8cm². But that's just on my laptop screen. It would be different on a phone screen.

3 0

3 years ago