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evablogger [386]
3 years ago
10

Help help i will give brainliest please look at picture

Mathematics
2 answers:
Goryan [66]3 years ago
4 0

Answer:

Your answer is right, it is 343cm

Step-by-step explanation:

14 \times 21  = 294 \\ 28 - 21 = 7 \\ (7 \times 14) \div 2 = 49 \\ 294 + 49 = 343

nydimaria [60]3 years ago
3 0

Answer:

B

Step-by-step explanation:

not completely sure that's right sorry if its Wong

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Systems of Equations via Elimination
Natalka [10]

Answer:

Step-by-step explanation:

The shop sold 70 ice cream cones. It means that x + y = 70Small cones cost 3.95 and large cones cost 5.75. The total sales made from the selling 70 ice creams is $370.10. It means that 3.95x + 5.75y = 370.1 - - - - - - - - - -1Substituting x = 70 - y into equation 1, it becomes3.95(70 - y) + 5.75y = 370.1276.5 - 3.95y + 5.75y = 370.1- 3.95y + 5.75y = 370.1 - 276.51.8y = 93.6y = 93.6/1.8y = 52x = 70 - 52x = 18. Ww

Read more on Brainly.com - brainly.com/question/14570469#readmore

5 0
4 years ago
Help this is due today!!!!
KIM [24]

\frac{4}{32}  \times 100 = 12.5\%
7 0
3 years ago
A water yank holds 18,000 gallons. How long will it take for the water level to reach 6,000 gallons if the water is used at an a
Oduvanchick [21]

Answer:

see below  PLEASE GIVE BRAINLIEST

Step-by-step explanation:

18,000 - 6000 = 12,000

12,000 ÷ 450 = 26.66 = 26 days 16 hours

8 0
3 years ago
There are 4 blue marbles, 8 red marbles and 5 green marbles. Write a part to whole ratio comparing green marbles.
fredd [130]

Answer:

5:17

Step-by-step explanation:

there are 17 total marbles and 5 that are green. The part is 5 and the whole is 17.

4 0
2 years ago
Read 2 more answers
A^-1/[a^-1 - b^-1] + a^-1/[a^-1 + b^-1]
o-na [289]

\dfrac{a^{-1}}{a^{-1}-b^{-1}}+\dfrac{a^{-1}}{a^{-1}+b^{-1}}=a^{-1}\left(\dfrac{a^{-1}+b^{-1}}{(a^{-1}-b^{-1})(a^{-1}+b^{-1})}+\dfrac{a^{-1}-b^{-1}}{(a^{-1}+b^{-1})(a^{-1}-b^{-1})}\right)

=a^{-1}\left(\dfrac{(a^{-1}+b^{-1})+(a^{-1}-b^{-1})}{a^{-2}-b^{-2}}\right)

=\dfrac{2a^{-2}}{a^{-2}-b^{-2}}

=\dfrac{2b^2}{b^2-a^2}

5 0
3 years ago
Read 2 more answers
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