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3 years ago

Does anyone know how to do this?

Mathematics

2 answers:

Arte-miy333 [17]3 years ago

5 0

Answer:

71%

Step-by-step explanation:

She has 65% for 1st paper which have 120marks, we can calcule how marks she done:

120*0,65=78

On the 2nd pper she done:

80*0,80=64

The total marks was 120+80=200

She done 78+64=142

200—>100%

142—->x%

X=14200/200=71

Total procent score is 71%

Andrew [12]3 years ago

4 0

Answer:

Yes

Step-by-step explanati

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__Na2O + __ H2O → __NaOH

Andrews [41]

Answer:

Na20+H20 -> 2NaOH

Step-by-step explanation:

8 0

2 years ago

To one decimal point how many millimeters are there in 57 inches

attashe74 [19]

1 inch =25.4 millimeters
therefore to calculate the number of millimeters that are in 57 inches we proceed as follows;
(25.4)/1*57
=1447.8/1
=1447.8 millimeters
The answer is 1447.8 mm
Therefore we conclude that there are 1,447.8 millimeters in 57 inches.

4 0

2 years ago

What is the measure of X?

AnnZ [28]

Answer:

A. 25.7°

Step-by-step explanation:

the sum of straight angle is 180°.

so, i subtract 154.3 from 180.

i get 25.7 °

3 0

2 years ago

HELP ME PLEASE I REALLY NEED HELP!? :(

Aleksandr [31]

Just answers since long and many simplifiction
it's like doing those multiplication memory things that had like 100 questions but now with algebra fractions

5. fourth or $\frac{5x-15}{x^{2}-3x-28}$
6. third or $\frac{4x+25}{x^{2}+5x+4}$
7.the answe ris x+3 since it can be factored out of the 5x+15 tingie (second )
8. fourth or $\frac{x^{2}+4x}{4}$
9. fourth or $\frac{2y+6}{9y-7}$ times $\frac{3}{2}$
10. third or $\frac{(x+3)(x+8)}{(x-8)(x-8)}$
11. second or $\frac{x-5}{x-4}$
12. third or 11(x+7)=60

5 0

2 years ago

irakobra [83]

First one is 14
Second one is 45
Third one is 43
Fourth one is 40

8 0

3 years ago

Read 2 more answers