Asked by Jenessa in Math

How do I solve both equations? Please explain how do you solve them. Thank you.

-4a×-2b+5ab+3b-2a12c-13d+e-623c+12d-e
 

Asked by Jenessa in Math

Can someone help me with both equations? Please?

Asked by Fatina in Math

Solve this:

Q. Estimate the value of   19.96 × 5.033.98correct to I significant figure. Use your answer from part (a) to estimate the value of ​19.96 × 0.503398

Asked by Blackkcatt in Physics

Hihi.... pls helpppp urgent! Thank you so much

Asked by Blackkcatt in Physics

Hihi, how to do this question? :) thanks~

Asked by Xin in Math

How to do this question?pls help. Thank you.

Asked by Al Shafiq in Math


Q. The diagram shows a sketch of a field.



Make an accurate scale drawing of the field. If the scale of 1 cm represent 10 m.

Asked by Izzat in Math

Solve this:

Asked by Lannan in Math

Solve this:
Q.2. A polygon has n sides. Four of the exterior angles are 23°, 35°, 18° and 14°, while each of the remaining (n - 4) exterior angles is 30°. Find the value of n.

Asked by Jiminsshi in Chemistry

Table 2.1 below shows information on substances A, B, C and D.
Table 2.1
substance melting point / °C boiling point / °C
A -250 -35
B -2 37
C 25 140
D 82 320

a)  Which of the substances above evaporates easily at room temperature?

b)  Draw the arrangement of the particles of substance A at -300°C in Figure 2.2 below


c)  Describe the arrangement and movement of the particles of substance D at 500 °C.

Asked by Jiminsshi in Chemistry

Solve this :

Q. (a)  A chromatogram was run on a drop of dye solution from some leaves as shown in Fig 8.1 below. The solvent used was an organic solvent, propanone.
(i)  Explain why the yellow spot is further away from the baseline then the green spot.

(ii)  Will running the dye of another leaf from another plant species with the same colour result in an identical chromatogram ? Explain. 

 

Asked by Cecilia in Chemistry

How to do the question

Asked by Jiminsshi in Physics

Solve this:
Q.d) At a depth of 40 m, the pressure exerted on the helmet is 50 N/cm2. Calculate the force exerted on the helmet window at this depth.

Asked by Jiminsshi in Chemistry

Solve this:
Q. A mixture of ethanol and water can be separated by fractional distillation. Ethanol and water boil at 78°C and 100°C respectively. Sketch and label on Fig. 6.2 below, the graph showing how temperature changes as a solution of ethanol and water is fractionally distilled.

Asked by Jiminsshi in Physics

Solve this:
Q. A mixture of ethanol and water can be separated by fractional distillation. Ethanol and water boil at 78°C and 100°C respectively. Sketch and label on Fig. 6.2 below, the graph showing how temperature changes as a solution of ethanol and water is fractionally distilled.

 

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